java.lang.Object
- org.apache.commons.math.linear.AbstractRealVector

All Implemented Interfaces:

RealVector

Direct Known Subclasses:

ArrayRealVector, OpenMapRealVector
```
public abstract class AbstractRealVector
extends Object
implements RealVector
```
This class provides default basic implementations for many methods in the RealVector interface.

Since:

2.1

Nested Class Summary
- Nested classes/interfaces inherited from interface org.apache.commons.math.linear.RealVector
  RealVector.Entry

Constructor Summary

Constructors
Constructor Description

AbstractRealVector()

Method Summary

All Methods Instance Methods Abstract Methods Concrete Methods
Modifier and Type	Method	Description
`RealVector`	`add(double[] v)`	Compute the sum of this vector and `v`.
`RealVector`	`add(RealVector v)`	Compute the sum of this vector and `v`.
`abstract AbstractRealVector`	`copy()`	Returns a (deep) copy of this vector.
`double`	`dotProduct(double[] v)`	Compute the dot product.
`double`	`dotProduct(RealVector v)`	Compute the dot product.
`RealVector`	`ebeDivide(double[] v)`	Element-by-element division.
`RealVector`	`ebeMultiply(double[] v)`	Element-by-element multiplication.
`double[]`	`getData()`	Returns vector entries as a double array.
`double`	`getDistance(double[] v)`	Distance between two vectors.
`double`	`getDistance(RealVector v)`	Distance between two vectors.
`double`	`getL1Distance(double[] v)`	Distance between two vectors.
`double`	`getL1Distance(RealVector v)`	Distance between two vectors.
`double`	`getL1Norm()`	Returns the L₁ norm of the vector.
`double`	`getLInfDistance(double[] v)`	Distance between two vectors.
`double`	`getLInfDistance(RealVector v)`	Distance between two vectors.
`double`	`getLInfNorm()`	Returns the L_∞ norm of the vector.
`int`	`getMaxIndex()`	Get the index of the maximum entry.
`double`	`getMaxValue()`	Get the value of the maximum entry.
`int`	`getMinIndex()`	Get the index of the minimum entry.
`double`	`getMinValue()`	Get the value of the minimum entry.
`double`	`getNorm()`	Returns the L₂ norm of the vector.
`Iterator<RealVector.Entry>`	`iterator()`	Generic dense iterator.
`RealVector`	`map(UnivariateRealFunction function)`	Acts as if implemented as:
`RealVector`	`mapAbs()`	Map the `Math.abs(double)` function to each entry.
`RealVector`	`mapAbsToSelf()`	Map the `Math.abs(double)` function to each entry.
`RealVector`	`mapAcos()`	Map the `Math.acos(double)` function to each entry.
`RealVector`	`mapAcosToSelf()`	Map the `Math.acos(double)` function to each entry.
`RealVector`	`mapAdd(double d)`	Add a value to each entry.
`RealVector`	`mapAddToSelf(double d)`	Add a value to each entry.
`RealVector`	`mapAsin()`	Map the `Math.asin(double)` function to each entry.
`RealVector`	`mapAsinToSelf()`	Map the `Math.asin(double)` function to each entry.
`RealVector`	`mapAtan()`	Map the `Math.atan(double)` function to each entry.
`RealVector`	`mapAtanToSelf()`	Map the `Math.atan(double)` function to each entry.
`RealVector`	`mapCbrt()`	Map the `Math.cbrt(double)` function to each entry.
`RealVector`	`mapCbrtToSelf()`	Map the `Math.cbrt(double)` function to each entry.
`RealVector`	`mapCeil()`	Map the `Math.ceil(double)` function to each entry.
`RealVector`	`mapCeilToSelf()`	Map the `Math.ceil(double)` function to each entry.
`RealVector`	`mapCos()`	Map the `Math.cos(double)` function to each entry.
`RealVector`	`mapCosh()`	Map the `Math.cosh(double)` function to each entry.
`RealVector`	`mapCoshToSelf()`	Map the `Math.cosh(double)` function to each entry.
`RealVector`	`mapCosToSelf()`	Map the `Math.cos(double)` function to each entry.
`RealVector`	`mapDivide(double d)`	Divide each entry.
`RealVector`	`mapDivideToSelf(double d)`	Divide each entry.
`RealVector`	`mapExp()`	Map the `Math.exp(double)` function to each entry.
`RealVector`	`mapExpm1()`	Map the `Math.expm1(double)` function to each entry.
`RealVector`	`mapExpm1ToSelf()`	Map the `Math.expm1(double)` function to each entry.
`RealVector`	`mapExpToSelf()`	Map `Math.exp(double)` operation to each entry.
`RealVector`	`mapFloor()`	Map the `Math.floor(double)` function to each entry.
`RealVector`	`mapFloorToSelf()`	Map the `Math.floor(double)` function to each entry.
`RealVector`	`mapInv()`	Map the 1/x function to each entry.
`RealVector`	`mapInvToSelf()`	Map the 1/x function to each entry.
`RealVector`	`mapLog()`	Map the `Math.log(double)` function to each entry.
`RealVector`	`mapLog10()`	Map the `Math.log10(double)` function to each entry.
`RealVector`	`mapLog10ToSelf()`	Map the `Math.log10(double)` function to each entry.
`RealVector`	`mapLog1p()`	Map the `Math.log1p(double)` function to each entry.
`RealVector`	`mapLog1pToSelf()`	Map the `Math.log1p(double)` function to each entry.
`RealVector`	`mapLogToSelf()`	Map the `Math.log(double)` function to each entry.
`RealVector`	`mapMultiply(double d)`	Multiply each entry.
`RealVector`	`mapMultiplyToSelf(double d)`	Multiply each entry.
`RealVector`	`mapPow(double d)`	Map a power operation to each entry.
`RealVector`	`mapPowToSelf(double d)`	Map a power operation to each entry.
`RealVector`	`mapRint()`	Map the `Math.rint(double)` function to each entry.
`RealVector`	`mapRintToSelf()`	Map the `Math.rint(double)` function to each entry.
`RealVector`	`mapSignum()`	Map the `Math.signum(double)` function to each entry.
`RealVector`	`mapSignumToSelf()`	Map the `Math.signum(double)` function to each entry.
`RealVector`	`mapSin()`	Map the `Math.sin(double)` function to each entry.
`RealVector`	`mapSinh()`	Map the `Math.sinh(double)` function to each entry.
`RealVector`	`mapSinhToSelf()`	Map the `Math.sinh(double)` function to each entry.
`RealVector`	`mapSinToSelf()`	Map the `Math.sin(double)` function to each entry.
`RealVector`	`mapSqrt()`	Map the `Math.sqrt(double)` function to each entry.
`RealVector`	`mapSqrtToSelf()`	Map the `Math.sqrt(double)` function to each entry.
`RealVector`	`mapSubtract(double d)`	Subtract a value from each entry.
`RealVector`	`mapSubtractToSelf(double d)`	Subtract a value from each entry.
`RealVector`	`mapTan()`	Map the `Math.tan(double)` function to each entry.
`RealVector`	`mapTanh()`	Map the `Math.tanh(double)` function to each entry.
`RealVector`	`mapTanhToSelf()`	Map the `Math.tanh(double)` function to each entry.
`RealVector`	`mapTanToSelf()`	Map the `Math.tan(double)` function to each entry.
`RealVector`	`mapToSelf(UnivariateRealFunction function)`	Acts as if it is implemented as:
`RealVector`	`mapUlp()`	Map the `Math.ulp(double)` function to each entry.
`RealVector`	`mapUlpToSelf()`	Map the `Math.ulp(double)` function to each entry.
`RealMatrix`	`outerProduct(double[] v)`	Compute the outer product.
`RealMatrix`	`outerProduct(RealVector v)`	Compute the outer product.
`RealVector`	`projection(double[] v)`	Find the orthogonal projection of this vector onto another vector.
`void`	`set(double value)`	Set all elements to a single value.
`void`	`setSubVector(int index, double[] v)`	Set a set of consecutive elements.
`void`	`setSubVector(int index, RealVector v)`	Set a set of consecutive elements.
`Iterator<RealVector.Entry>`	`sparseIterator()`	Specialized implementations may choose to not iterate over all dimensions, either because those values are unset, or are equal to defaultValue(), or are small enough to be ignored for the purposes of iteration.
`RealVector`	`subtract(double[] v)`	Subtract `v` from this vector.
`RealVector`	`subtract(RealVector v)`	Subtract `v` from this vector.
`double[]`	`toArray()`	Convert the vector to a double array.
`void`	`unitize()`	Converts this vector into a unit vector.
`RealVector`	`unitVector()`	Creates a unit vector pointing in the direction of this vector.

Methods inherited from class java.lang.Object
equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface org.apache.commons.math.linear.RealVector
append, append, append, ebeDivide, ebeMultiply, getDimension, getEntry, getSubVector, isInfinite, isNaN, projection, setEntry

- Constructor Detail
  - AbstractRealVector
```
public AbstractRealVector()
```
- Method Detail
  - setSubVector
```
public void setSubVector(int index,
                         RealVector v)
                  throws MatrixIndexException
```
    Set a set of consecutive elements.
    
    Specified by:
    
    setSubVector in interface RealVector
    
    Parameters:
    
    index - index of first element to be set.
    
    v - vector containing the values to set.
    
    Throws:
    
    MatrixIndexException
    
    See Also:
    
    RealVector.setSubVector(int, double[])
  - setSubVector
```
public void setSubVector(int index,
                         double[] v)
                  throws MatrixIndexException
```
    Set a set of consecutive elements.
    
    Specified by:
    
    setSubVector in interface RealVector
    
    Parameters:
    
    index - index of first element to be set.
    
    v - vector containing the values to set.
    
    Throws:
    
    MatrixIndexException
    
    See Also:
    
    RealVector.setSubVector(int, RealVector)
  - add
```
public RealVector add(double[] v)
               throws IllegalArgumentException
```
    Compute the sum of this vector and v.
    
    Specified by:
    
    add in interface RealVector
    
    Parameters:
    
    v - Vector to be added.
    
    Returns:
    
    this + v.
    
    Throws:
    
    DimensionMismatchException - if v is not the same size as this vector.
    
    IllegalArgumentException
  - add
```
public RealVector add(RealVector v)
               throws IllegalArgumentException
```
    Compute the sum of this vector and v.
    
    Specified by:
    
    add in interface RealVector
    
    Parameters:
    
    v - Vector to be added.
    
    Returns:
    
    this + v.
    
    Throws:
    
    DimensionMismatchException - if v is not the same size as this vector.
    
    IllegalArgumentException
  - subtract
```
public RealVector subtract(double[] v)
                    throws IllegalArgumentException
```
    Subtract v from this vector.
    
    Specified by:
    
    subtract in interface RealVector
    
    Parameters:
    
    v - Vector to be subtracted.
    
    Returns:
    
    this - v.
    
    Throws:
    
    DimensionMismatchException - if v is not the same size as this vector.
    
    IllegalArgumentException
  - subtract
```
public RealVector subtract(RealVector v)
                    throws IllegalArgumentException
```
    Subtract v from this vector.
    
    Specified by:
    
    subtract in interface RealVector
    
    Parameters:
    
    v - Vector to be subtracted.
    
    Returns:
    
    this - v.
    
    Throws:
    
    DimensionMismatchException - if v is not the same size as this vector.
    
    IllegalArgumentException
  - mapAdd
```
public RealVector mapAdd(double d)
```
    Add a value to each entry.
    
    Specified by:
    
    mapAdd in interface RealVector
    
    Parameters:
    
    d - Value to be added to each entry.
    
    Returns:
    
    this + d.
  - mapAddToSelf
```
public RealVector mapAddToSelf(double d)
```
    Add a value to each entry. The instance is changed in-place.
    
    Specified by:
    
    mapAddToSelf in interface RealVector
    
    Parameters:
    
    d - Value to be added to each entry.
    
    Returns:
    
    this.
  - copy
```
public abstract AbstractRealVector copy()
```
    Returns a (deep) copy of this vector.
    
    Specified by:
    
    copy in interface RealVector
    
    Returns:
    
    a vector copy.
  - dotProduct
```
public double dotProduct(double[] v)
                  throws IllegalArgumentException
```
    Compute the dot product.
    
    Specified by:
    
    dotProduct in interface RealVector
    
    Parameters:
    
    v - vector with which dot product should be computed
    
    Returns:
    
    the scalar dot product between instance and v
    
    Throws:
    
    DimensionMismatchException - if v is not the same size as this vector.
    
    IllegalArgumentException
  - dotProduct
```
public double dotProduct(RealVector v)
                  throws IllegalArgumentException
```
    Compute the dot product.
    
    Specified by:
    
    dotProduct in interface RealVector
    
    Parameters:
    
    v - vector with which dot product should be computed
    
    Returns:
    
    the scalar dot product between instance and v
    
    Throws:
    
    DimensionMismatchException - if v is not the same size as this vector.
    
    IllegalArgumentException
  - ebeDivide
```
public RealVector ebeDivide(double[] v)
                     throws IllegalArgumentException
```
    Element-by-element division.
    
    Specified by:
    
    ebeDivide in interface RealVector
    
    Parameters:
    
    v - vector by which instance elements must be divided
    
    Returns:
    
    a vector containing this[i] / v[i] for all i
    
    Throws:
    
    DimensionMismatchException - if v is not the same size as this vector.
    
    IllegalArgumentException
  - ebeMultiply
```
public RealVector ebeMultiply(double[] v)
                       throws IllegalArgumentException
```
    Element-by-element multiplication.
    
    Specified by:
    
    ebeMultiply in interface RealVector
    
    Parameters:
    
    v - vector by which instance elements must be multiplied
    
    Returns:
    
    a vector containing this[i] * v[i] for all i
    
    Throws:
    
    DimensionMismatchException - if v is not the same size as this vector.
    
    IllegalArgumentException
  - getDistance
```
public double getDistance(RealVector v)
                   throws IllegalArgumentException
```
    Distance between two vectors.
    This method computes the distance consistent with the L₂ norm, i.e. the square root of the sum of elements differences, or euclidian distance.
    
    Specified by:
    
    getDistance in interface RealVector
    
    Parameters:
    
    v - vector to which distance is requested
    
    Returns:
    
    distance between two vectors.
    
    Throws:
    
    DimensionMismatchException - if v is not the same size as this vector.
    
    IllegalArgumentException
    
    See Also:
    
    RealVector.getL1Distance(RealVector), RealVector.getLInfDistance(RealVector), RealVector.getNorm()
  - getNorm
```
public double getNorm()
```
    Returns the L₂ norm of the vector.
    The L₂ norm is the root of the sum of the squared elements.
    
    Specified by:
    
    getNorm in interface RealVector
    
    Returns:
    
    norm
    
    See Also:
    
    RealVector.getL1Norm(), RealVector.getLInfNorm(), RealVector.getDistance(RealVector)
  - getL1Norm
```
public double getL1Norm()
```
    Returns the L₁ norm of the vector.
    The L₁ norm is the sum of the absolute values of elements.
    
    Specified by:
    
    getL1Norm in interface RealVector
    
    Returns:
    
    norm
    
    See Also:
    
    RealVector.getNorm(), RealVector.getLInfNorm(), RealVector.getL1Distance(RealVector)
  - getLInfNorm
```
public double getLInfNorm()
```
    Returns the L_∞ norm of the vector.
    The L_∞ norm is the max of the absolute values of elements.
    
    Specified by:
    
    getLInfNorm in interface RealVector
    
    Returns:
    
    norm
    
    See Also:
    
    RealVector.getNorm(), RealVector.getL1Norm(), RealVector.getLInfDistance(RealVector)
  - getDistance
```
public double getDistance(double[] v)
                   throws IllegalArgumentException
```
    Distance between two vectors.
    This method computes the distance consistent with the L₂ norm, i.e. the square root of the sum of elements differences, or euclidian distance.
    
    Specified by:
    
    getDistance in interface RealVector
    
    Parameters:
    
    v - vector to which distance is requested
    
    Returns:
    
    distance between two vectors.
    
    Throws:
    
    DimensionMismatchException - if v is not the same size as this vector.
    
    IllegalArgumentException
    
    See Also:
    
    RealVector.getL1Distance(double[]), RealVector.getLInfDistance(double[]), RealVector.getNorm()
  - getL1Distance
```
public double getL1Distance(RealVector v)
                     throws IllegalArgumentException
```
    Distance between two vectors.
    This method computes the distance consistent with L₁ norm, i.e. the sum of the absolute values of elements differences.
    
    Specified by:
    
    getL1Distance in interface RealVector
    
    Parameters:
    
    v - vector to which distance is requested
    
    Returns:
    
    distance between two vectors.
    
    Throws:
    
    DimensionMismatchException - if v is not the same size as this vector.
    
    IllegalArgumentException
    
    See Also:
    
    RealVector.getDistance(RealVector), RealVector.getLInfDistance(RealVector), RealVector.getL1Norm()
  - getL1Distance
```
public double getL1Distance(double[] v)
                     throws IllegalArgumentException
```
    Distance between two vectors.
    This method computes the distance consistent with L₁ norm, i.e. the sum of the absolute values of elements differences.
    
    Specified by:
    
    getL1Distance in interface RealVector
    
    Parameters:
    
    v - vector to which distance is requested
    
    Returns:
    
    distance between two vectors.
    
    Throws:
    
    DimensionMismatchException - if v is not the same size as this vector.
    
    IllegalArgumentException
    
    See Also:
    
    RealVector.getDistance(double[]), RealVector.getLInfDistance(double[]), RealVector.getL1Norm()
  - getLInfDistance
```
public double getLInfDistance(RealVector v)
                       throws IllegalArgumentException
```
    Distance between two vectors.
    This method computes the distance consistent with L_∞ norm, i.e. the max of the absolute values of elements differences.
    
    Specified by:
    
    getLInfDistance in interface RealVector
    
    Parameters:
    
    v - vector to which distance is requested
    
    Returns:
    
    distance between two vectors.
    
    Throws:
    
    DimensionMismatchException - if v is not the same size as this vector.
    
    IllegalArgumentException
    
    See Also:
    
    RealVector.getDistance(RealVector), RealVector.getL1Distance(RealVector), RealVector.getLInfNorm()
  - getLInfDistance
```
public double getLInfDistance(double[] v)
                       throws IllegalArgumentException
```
    Distance between two vectors.
    This method computes the distance consistent with L_∞ norm, i.e. the max of the absolute values of elements differences.
    
    Specified by:
    
    getLInfDistance in interface RealVector
    
    Parameters:
    
    v - vector to which distance is requested
    
    Returns:
    
    distance between two vectors.
    
    Throws:
    
    DimensionMismatchException - if v is not the same size as this vector.
    
    IllegalArgumentException
    
    See Also:
    
    RealVector.getDistance(double[]), RealVector.getL1Distance(double[]), RealVector.getLInfNorm()
  - getMinIndex
```
public int getMinIndex()
```
    Get the index of the minimum entry.
    
    Returns:
    
    index of the minimum entry or -1 if vector length is 0 or all entries are NaN
  - getMinValue
```
public double getMinValue()
```
    Get the value of the minimum entry.
    
    Returns:
    
    value of the minimum entry or NaN if all entries are NaN
  - getMaxIndex
```
public int getMaxIndex()
```
    Get the index of the maximum entry.
    
    Returns:
    
    index of the maximum entry or -1 if vector length is 0 or all entries are NaN
  - getMaxValue
```
public double getMaxValue()
```
    Get the value of the maximum entry.
    
    Returns:
    
    value of the maximum entry or NaN if all entries are NaN
  - mapAbs
```
public RealVector mapAbs()
```
    Map the Math.abs(double) function to each entry.
    
    Specified by:
    
    mapAbs in interface RealVector
    
    Returns:
    
    a vector containing the result of applying the function to each entry
  - mapAbsToSelf
```
public RealVector mapAbsToSelf()
```
    Map the Math.abs(double) function to each entry.
    The instance is changed by this method.
    
    Specified by:
    
    mapAbsToSelf in interface RealVector
    
    Returns:
    
    for convenience, return this
  - mapAcos
```
public RealVector mapAcos()
```
    Map the Math.acos(double) function to each entry.
    
    Specified by:
    
    mapAcos in interface RealVector
    
    Returns:
    
    a vector containing the result of applying the function to each entry
  - mapAcosToSelf
```
public RealVector mapAcosToSelf()
```
    Map the Math.acos(double) function to each entry.
    The instance is changed by this method.
    
    Specified by:
    
    mapAcosToSelf in interface RealVector
    
    Returns:
    
    for convenience, return this
  - mapAsin
```
public RealVector mapAsin()
```
    Map the Math.asin(double) function to each entry.
    
    Specified by:
    
    mapAsin in interface RealVector
    
    Returns:
    
    a vector containing the result of applying the function to each entry
  - mapAsinToSelf
```
public RealVector mapAsinToSelf()
```
    Map the Math.asin(double) function to each entry.
    The instance is changed by this method.
    
    Specified by:
    
    mapAsinToSelf in interface RealVector
    
    Returns:
    
    for convenience, return this
  - mapAtan
```
public RealVector mapAtan()
```
    Map the Math.atan(double) function to each entry.
    
    Specified by:
    
    mapAtan in interface RealVector
    
    Returns:
    
    a vector containing the result of applying the function to each entry
  - mapAtanToSelf
```
public RealVector mapAtanToSelf()
```
    Map the Math.atan(double) function to each entry.
    The instance is changed by this method.
    
    Specified by:
    
    mapAtanToSelf in interface RealVector
    
    Returns:
    
    for convenience, return this
  - mapCbrt
```
public RealVector mapCbrt()
```
    Map the Math.cbrt(double) function to each entry.
    
    Specified by:
    
    mapCbrt in interface RealVector
    
    Returns:
    
    a vector containing the result of applying the function to each entry
  - mapCbrtToSelf
```
public RealVector mapCbrtToSelf()
```
    Map the Math.cbrt(double) function to each entry.
    The instance is changed by this method.
    
    Specified by:
    
    mapCbrtToSelf in interface RealVector
    
    Returns:
    
    for convenience, return this
  - mapCeil
```
public RealVector mapCeil()
```
    Map the Math.ceil(double) function to each entry.
    
    Specified by:
    
    mapCeil in interface RealVector
    
    Returns:
    
    a vector containing the result of applying the function to each entry
  - mapCeilToSelf
```
public RealVector mapCeilToSelf()
```
    Map the Math.ceil(double) function to each entry.
    The instance is changed by this method.
    
    Specified by:
    
    mapCeilToSelf in interface RealVector
    
    Returns:
    
    for convenience, return this
  - mapCos
```
public RealVector mapCos()
```
    Map the Math.cos(double) function to each entry.
    
    Specified by:
    
    mapCos in interface RealVector
    
    Returns:
    
    a vector containing the result of applying the function to each entry
  - mapCosToSelf
```
public RealVector mapCosToSelf()
```
    Map the Math.cos(double) function to each entry.
    The instance is changed by this method.
    
    Specified by:
    
    mapCosToSelf in interface RealVector
    
    Returns:
    
    for convenience, return this
  - mapCosh
```
public RealVector mapCosh()
```
    Map the Math.cosh(double) function to each entry.
    
    Specified by:
    
    mapCosh in interface RealVector
    
    Returns:
    
    a vector containing the result of applying the function to each entry
  - mapCoshToSelf
```
public RealVector mapCoshToSelf()
```
    Map the Math.cosh(double) function to each entry.
    The instance is changed by this method.
    
    Specified by:
    
    mapCoshToSelf in interface RealVector
    
    Returns:
    
    for convenience, return this
  - mapDivide
```
public RealVector mapDivide(double d)
```
    Divide each entry.
    
    Specified by:
    
    mapDivide in interface RealVector
    
    Parameters:
    
    d - Value to divide by.
    
    Returns:
    
    this / d.
  - mapDivideToSelf
```
public RealVector mapDivideToSelf(double d)
```
    Divide each entry. The instance is changed in-place.
    
    Specified by:
    
    mapDivideToSelf in interface RealVector
    
    Parameters:
    
    d - Value to divide by.
    
    Returns:
    
    this.
  - mapExp
```
public RealVector mapExp()
```
    Map the Math.exp(double) function to each entry.
    
    Specified by:
    
    mapExp in interface RealVector
    
    Returns:
    
    a mapped copy of the vector.
  - mapExpToSelf
```
public RealVector mapExpToSelf()
```
    Map Math.exp(double) operation to each entry. The instance is changed in-place.
    
    Specified by:
    
    mapExpToSelf in interface RealVector
    
    Returns:
    
    the mapped vector.
  - mapExpm1
```
public RealVector mapExpm1()
```
    Map the Math.expm1(double) function to each entry.
    
    Specified by:
    
    mapExpm1 in interface RealVector
    
    Returns:
    
    a vector containing the result of applying the function to each entry
  - mapExpm1ToSelf
```
public RealVector mapExpm1ToSelf()
```
    Map the Math.expm1(double) function to each entry.
    The instance is changed by this method.
    
    Specified by:
    
    mapExpm1ToSelf in interface RealVector
    
    Returns:
    
    for convenience, return this
  - mapFloor
```
public RealVector mapFloor()
```
    Map the Math.floor(double) function to each entry.
    
    Specified by:
    
    mapFloor in interface RealVector
    
    Returns:
    
    a vector containing the result of applying the function to each entry
  - mapFloorToSelf
```
public RealVector mapFloorToSelf()
```
    Map the Math.floor(double) function to each entry.
    The instance is changed by this method.
    
    Specified by:
    
    mapFloorToSelf in interface RealVector
    
    Returns:
    
    for convenience, return this
  - mapInv
```
public RealVector mapInv()
```
    Map the 1/x function to each entry.
    
    Specified by:
    
    mapInv in interface RealVector
    
    Returns:
    
    a vector containing the result of applying the function to each entry
  - mapInvToSelf
```
public RealVector mapInvToSelf()
```
    Map the 1/x function to each entry.
    The instance is changed by this method.
    
    Specified by:
    
    mapInvToSelf in interface RealVector
    
    Returns:
    
    for convenience, return this
  - mapLog
```
public RealVector mapLog()
```
    Map the Math.log(double) function to each entry.
    
    Specified by:
    
    mapLog in interface RealVector
    
    Returns:
    
    a vector containing the result of applying the function to each entry
  - mapLogToSelf
```
public RealVector mapLogToSelf()
```
    Map the Math.log(double) function to each entry.
    The instance is changed by this method.
    
    Specified by:
    
    mapLogToSelf in interface RealVector
    
    Returns:
    
    for convenience, return this
  - mapLog10
```
public RealVector mapLog10()
```
    Map the Math.log10(double) function to each entry.
    
    Specified by:
    
    mapLog10 in interface RealVector
    
    Returns:
    
    a vector containing the result of applying the function to each entry
  - mapLog10ToSelf
```
public RealVector mapLog10ToSelf()
```
    Map the Math.log10(double) function to each entry.
    The instance is changed by this method.
    
    Specified by:
    
    mapLog10ToSelf in interface RealVector
    
    Returns:
    
    for convenience, return this
  - mapLog1p
```
public RealVector mapLog1p()
```
    Map the Math.log1p(double) function to each entry.
    
    Specified by:
    
    mapLog1p in interface RealVector
    
    Returns:
    
    a vector containing the result of applying the function to each entry
  - mapLog1pToSelf
```
public RealVector mapLog1pToSelf()
```
    Map the Math.log1p(double) function to each entry.
    The instance is changed by this method.
    
    Specified by:
    
    mapLog1pToSelf in interface RealVector
    
    Returns:
    
    for convenience, return this
  - mapMultiply
```
public RealVector mapMultiply(double d)
```
    Multiply each entry.
    
    Specified by:
    
    mapMultiply in interface RealVector
    
    Parameters:
    
    d - Multiplication factor.
    
    Returns:
    
    this * d.
  - mapMultiplyToSelf
```
public RealVector mapMultiplyToSelf(double d)
```
    Multiply each entry. The instance is changed in-place.
    
    Specified by:
    
    mapMultiplyToSelf in interface RealVector
    
    Parameters:
    
    d - Multiplication factor.
    
    Returns:
    
    this.
  - mapPow
```
public RealVector mapPow(double d)
```
    Map a power operation to each entry.
    
    Specified by:
    
    mapPow in interface RealVector
    
    Parameters:
    
    d - Operator value.
    
    Returns:
    
    a mapped copy of the vector.
  - mapPowToSelf
```
public RealVector mapPowToSelf(double d)
```
    Map a power operation to each entry. The instance is changed in-place.
    
    Specified by:
    
    mapPowToSelf in interface RealVector
    
    Parameters:
    
    d - Operator value.
    
    Returns:
    
    the mapped vector.
  - mapRint
```
public RealVector mapRint()
```
    Map the Math.rint(double) function to each entry.
    
    Specified by:
    
    mapRint in interface RealVector
    
    Returns:
    
    a vector containing the result of applying the function to each entry
  - mapRintToSelf
```
public RealVector mapRintToSelf()
```
    Map the Math.rint(double) function to each entry.
    The instance is changed by this method.
    
    Specified by:
    
    mapRintToSelf in interface RealVector
    
    Returns:
    
    for convenience, return this
  - mapSignum
```
public RealVector mapSignum()
```
    Map the Math.signum(double) function to each entry.
    
    Specified by:
    
    mapSignum in interface RealVector
    
    Returns:
    
    a vector containing the result of applying the function to each entry
  - mapSignumToSelf
```
public RealVector mapSignumToSelf()
```
    Map the Math.signum(double) function to each entry.
    The instance is changed by this method.
    
    Specified by:
    
    mapSignumToSelf in interface RealVector
    
    Returns:
    
    for convenience, return this
  - mapSin
```
public RealVector mapSin()
```
    Map the Math.sin(double) function to each entry.
    
    Specified by:
    
    mapSin in interface RealVector
    
    Returns:
    
    a vector containing the result of applying the function to each entry
  - mapSinToSelf
```
public RealVector mapSinToSelf()
```
    Map the Math.sin(double) function to each entry.
    The instance is changed by this method.
    
    Specified by:
    
    mapSinToSelf in interface RealVector
    
    Returns:
    
    for convenience, return this
  - mapSinh
```
public RealVector mapSinh()
```
    Map the Math.sinh(double) function to each entry.
    
    Specified by:
    
    mapSinh in interface RealVector
    
    Returns:
    
    a vector containing the result of applying the function to each entry
  - mapSinhToSelf
```
public RealVector mapSinhToSelf()
```
    Map the Math.sinh(double) function to each entry.
    The instance is changed by this method.
    
    Specified by:
    
    mapSinhToSelf in interface RealVector
    
    Returns:
    
    for convenience, return this
  - mapSqrt
```
public RealVector mapSqrt()
```
    Map the Math.sqrt(double) function to each entry.
    
    Specified by:
    
    mapSqrt in interface RealVector
    
    Returns:
    
    a vector containing the result of applying the function to each entry
  - mapSqrtToSelf
```
public RealVector mapSqrtToSelf()
```
    Map the Math.sqrt(double) function to each entry.
    The instance is changed by this method.
    
    Specified by:
    
    mapSqrtToSelf in interface RealVector
    
    Returns:
    
    for convenience, return this
  - mapSubtract
```
public RealVector mapSubtract(double d)
```
    Subtract a value from each entry.
    
    Specified by:
    
    mapSubtract in interface RealVector
    
    Parameters:
    
    d - Value to be subtracted.
    
    Returns:
    
    this - d.
  - mapSubtractToSelf
```
public RealVector mapSubtractToSelf(double d)
```
    Subtract a value from each entry. The instance is changed in-place.
    
    Specified by:
    
    mapSubtractToSelf in interface RealVector
    
    Parameters:
    
    d - Value to be subtracted.
    
    Returns:
    
    this.
  - mapTan
```
public RealVector mapTan()
```
    Map the Math.tan(double) function to each entry.
    
    Specified by:
    
    mapTan in interface RealVector
    
    Returns:
    
    a vector containing the result of applying the function to each entry
  - mapTanToSelf
```
public RealVector mapTanToSelf()
```
    Map the Math.tan(double) function to each entry.
    The instance is changed by this method.
    
    Specified by:
    
    mapTanToSelf in interface RealVector
    
    Returns:
    
    for convenience, return this
  - mapTanh
```
public RealVector mapTanh()
```
    Map the Math.tanh(double) function to each entry.
    
    Specified by:
    
    mapTanh in interface RealVector
    
    Returns:
    
    a vector containing the result of applying the function to each entry
  - mapTanhToSelf
```
public RealVector mapTanhToSelf()
```
    Map the Math.tanh(double) function to each entry.
    The instance is changed by this method.
    
    Specified by:
    
    mapTanhToSelf in interface RealVector
    
    Returns:
    
    for convenience, return this
  - mapUlp
```
public RealVector mapUlp()
```
    Map the Math.ulp(double) function to each entry.
    
    Specified by:
    
    mapUlp in interface RealVector
    
    Returns:
    
    a vector containing the result of applying the function to each entry
  - mapUlpToSelf
```
public RealVector mapUlpToSelf()
```
    Map the Math.ulp(double) function to each entry.
    The instance is changed by this method.
    
    Specified by:
    
    mapUlpToSelf in interface RealVector
    
    Returns:
    
    for convenience, return this
  - outerProduct
```
public RealMatrix outerProduct(RealVector v)
                        throws IllegalArgumentException
```
    Compute the outer product.
    
    Specified by:
    
    outerProduct in interface RealVector
    
    Parameters:
    
    v - vector with which outer product should be computed
    
    Returns:
    
    the square matrix outer product between instance and v
    
    Throws:
    
    DimensionMismatchException - if v is not the same size as this vector.
    
    IllegalArgumentException
  - outerProduct
```
public RealMatrix outerProduct(double[] v)
                        throws IllegalArgumentException
```
    Compute the outer product.
    
    Specified by:
    
    outerProduct in interface RealVector
    
    Parameters:
    
    v - vector with which outer product should be computed
    
    Returns:
    
    the square matrix outer product between instance and v
    
    Throws:
    
    DimensionMismatchException - if v is not the same size as this vector.
    
    IllegalArgumentException
  - projection
```
public RealVector projection(double[] v)
                      throws IllegalArgumentException
```
    Find the orthogonal projection of this vector onto another vector.
    
    Specified by:
    
    projection in interface RealVector
    
    Parameters:
    
    v - vector onto which instance must be projected
    
    Returns:
    
    projection of the instance onto v
    
    Throws:
    
    DimensionMismatchException - if v is not the same size as this vector.
    
    IllegalArgumentException
  - set
```
public void set(double value)
```
    Set all elements to a single value.
    
    Specified by:
    
    set in interface RealVector
    
    Parameters:
    
    value - single value to set for all elements
  - toArray
```
public double[] toArray()
```
    Convert the vector to a double array.
    The array is independent from vector data, it's elements are copied.
    
    Specified by:
    
    toArray in interface RealVector
    
    Returns:
    
    array containing a copy of vector elements
  - getData
```
public double[] getData()
```
    Returns vector entries as a double array.
    
    Specified by:
    
    getData in interface RealVector
    
    Returns:
    
    double array of entries
  - unitVector
```
public RealVector unitVector()
```
    Creates a unit vector pointing in the direction of this vector.
    The instance is not changed by this method.
    
    Specified by:
    
    unitVector in interface RealVector
    
    Returns:
    
    a unit vector pointing in direction of this vector
  - unitize
```
public void unitize()
```
    Converts this vector into a unit vector.
    The instance itself is changed by this method.
    
    Specified by:
    
    unitize in interface RealVector
  - sparseIterator
```
public Iterator<RealVector.Entry> sparseIterator()
```
    Specialized implementations may choose to not iterate over all dimensions, either because those values are unset, or are equal to defaultValue(), or are small enough to be ignored for the purposes of iteration. No guarantees are made about order of iteration. In dense implementations, this method will often delegate to RealVector.iterator().
    
    Specified by:
    
    sparseIterator in interface RealVector
    
    Returns:
    
    a sparse iterator
  - iterator
```
public Iterator<RealVector.Entry> iterator()
```
    Generic dense iterator. It iterates in increasing order of the vector index.
    
    Specified by:
    
    iterator in interface RealVector
    
    Returns:
    
    a dense iterator
  - map
```
public RealVector map(UnivariateRealFunction function)
               throws FunctionEvaluationException
```
    Acts as if implemented as:
    return copy().map(function);
    Specified by:
    
    map in interface RealVector
    
    Parameters:
    
    function - Function to apply to each entry.
    
    Returns:
    
    a new vector.
    
    Throws:
    
    FunctionEvaluationException - if the function throws it.
  - mapToSelf
```
public RealVector mapToSelf(UnivariateRealFunction function)
                     throws FunctionEvaluationException
```
    Acts as if it is implemented as:
    Entry e = null; for(Iterator it = iterator(); it.hasNext(); e = it.next()) { e.setValue(function.value(e.getValue())); }
    Specified by:
    
    mapToSelf in interface RealVector
    
    Parameters:
    
    function - Function to apply to each entry.
    
    Returns:
    
    this vector.
    
    Throws:
    
    FunctionEvaluationException - if the function throws it.

Class AbstractRealVector

Nested Class Summary

Nested classes/interfaces inherited from interface org.apache.commons.math.linear.RealVector

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Methods inherited from interface org.apache.commons.math.linear.RealVector

Constructor Detail

AbstractRealVector

Method Detail

setSubVector

setSubVector

add

add

subtract

subtract

mapAdd

mapAddToSelf

copy

dotProduct

dotProduct

ebeDivide

ebeMultiply

getDistance

getNorm

getL1Norm

getLInfNorm

getDistance

getL1Distance

getL1Distance

getLInfDistance

getLInfDistance

getMinIndex

getMinValue

getMaxIndex

getMaxValue

mapAbs

mapAbsToSelf

mapAcos

mapAcosToSelf

mapAsin

mapAsinToSelf

mapAtan

mapAtanToSelf

mapCbrt

mapCbrtToSelf

mapCeil

mapCeilToSelf

mapCos

mapCosToSelf

mapCosh

mapCoshToSelf

mapDivide

mapDivideToSelf

mapExp

mapExpToSelf

mapExpm1

mapExpm1ToSelf

mapFloor

mapFloorToSelf

mapInv

mapInvToSelf

mapLog

mapLogToSelf

mapLog10

mapLog10ToSelf

mapLog1p

mapLog1pToSelf

mapMultiply

mapMultiplyToSelf

mapPow

mapPowToSelf

mapRint

mapRintToSelf

mapSignum

mapSignumToSelf

mapSin

mapSinToSelf

mapSinh

mapSinhToSelf