Scale2D

Advanced Analysis Library Only

AnalysisLibErrType Scale2D (void *inputArray, int numberRows, int numberColumns, void *outputArray, double *offsetValue, double *scalingFactor);

Purpose

Scales the input array and returns the scale and offset constants. The scaled output array is in the range [–1 : 1]. Scale2D can obtain the (i, j)th element of the scaled array using the following formulas:



offset = min + scale

where max and min are the maximum and minimum values in the input array, respectively.

You can use LinEv2D to reconstruct the input array using the scale and offset constants. Scale2D can perform the operation in place; that is, the input and output arrays can be the same.

Parameters

Input
Name Type Description
inputArray numeric array Input array used as the basis for the scaling operation. This matrix must be an array of doubles.
numberRows integer Number of rows used in the scaling operation.
numberColumns integer Number of columns used in the scaling operation.
Output
Name Type Description
outputArray numeric array Scaled array, as an array of doubles.
offsetValue double-precision Offsetting constant of the input array.
scalingFactor double-precision Scaling constant of the input array.

Return Value

Name Type Description
status AnalysisLibErrType A value that specifies the type of error that occurred. Refer to analysis.h for definitions of these constants.