org.apache.poi.ss.formula.functions

Class Trend

java.lang.Object

org.apache.poi.ss.formula.functions.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)

known_y's, known_x's, new_x's	typically area references, possibly cell references or scalar values
constant	TRUE 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 and Description
Trend()

Method Summary

Modifier and Type	Method and Description
ValueEval	evaluate(ValueEval[] args, int srcRowIndex, int srcColumnIndex)

Methods inherited from class java.lang.Object

clone, equals, finalize, 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.