Scale2D

Advanced Analysis Library Only

AnalysisLibErrType Scale2D (void *inputArray, ssize_t numberOfRows, ssize_t numberOfColumns, 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.

The following uses the Scale2D function.

double inputData[10][10], scaledData[10][10];
double offset, scalingFactor;
int i, j, numRows, numCols;
AnalysisLibErrType status;

numRows = 10;
numCols = 10;
/* Use a For loop to generate a 2D array of random numbers between 0.0 and 1.0 */
for (j = 0; j < 10; j++)

for (i = 0; i < 10; i++)

inputData[i][j] = Random(0.0, 1.0);

/* Scale inputData and return offset and scaling factor */
status = Scale2D(inputData, numRows, numCols, scaledData, &offset, &scalingFactor);

Parameters

Return Value

Additional Information

Library: Advanced Analysis Library

Include file: analysis.h

LabWindows/CVI compatibility: LabWindows/CVI 3.1 and later