Package org.apache.poi.ss.formula.functions

Class Trend

  • All Implemented Interfaces:
    Function
    public final class Trend
extends java.lang.Object
implements Function
    Implementation for the Excel function TREND

    Syntax:
    TREND(known_y's, known_x's, new_x's, constant)

    Parameter descriptions
    known_y's, known_x's, new_x'stypically area references, possibly cell references or scalar values
    constantTRUE or FALSE: determines whether the regression line should include an intercept term

    If known_x's is not given, it is assumed to be the default array {1, 2, 3, ...} of the same size as known_y's.
    If new_x's is not given, it is assumed to be the same as known_x's
    If constant is omitted, it is assumed to be TRUE

    • Constructor Summary

      Constructors 
      Constructor Description
      Trend()  

    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      ValueEval evaluate​(ValueEval[] args, int srcRowIndex, int srcColumnIndex)  

      • Methods inherited from class java.lang.Object

        equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

    • Constructor Detail

      • Trend

        public Trend()

    • Method Detail

      • evaluate

        public ValueEval evaluate​(ValueEval[] args,
                          int srcRowIndex,
                          int srcColumnIndex)
        Specified by:
        evaluate in interface Function
        Parameters:
        args - the evaluated function arguments. Empty values are represented with BlankEval or MissingArgEval, never null.
        srcRowIndex - row index of the cell containing the formula under evaluation
        srcColumnIndex - column index of the cell containing the formula under evaluation
        Returns:
        The evaluated result, possibly an ErrorEval, never null. Note - Excel uses the error code #NUM! instead of IEEE NaN, so when numeric functions evaluate to Double.NaN be sure to translate the result to ErrorEval.NUM_ERROR.