National Instruments 320682C {

Chapter 3 Analysis Library

char *message = GetAnalysisErrorString (int errorNum)

Purpose

Converts the error number returned by an Analysis Library function into a meaningful error

message.

Parameters

Input errorNum integer Status returned by an

Analysis function.

Return Value

message string Explanation of error.

int status = Histogram (double inputArray[], int numberofElements, double base,

double top, int histogramArray[], double axisArray[],

int intervals);

Purpose

Computes the histogram of the inputArray. The histogram is obtained by counting the number

of times that the elements in the input array fall in the ith interval. Let

x = (xTop - xBase) / intervals

yx,i =

{

1 if i x x - xBase < (i + 1) x

0otherwise

∆∆≤

The ith element of the histogram is:

hist y x i

−

∑

(,)

The values of the histogram axis are the mid-point values of the intervals:

axis i x x xBase

i=+ +∆∆/2