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Chapter 3 Analysis Library
© National Instruments Corporation 3-19 LabWindows/CVI Standard Libraries
GetAnalysisErrorString
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.
Histogram
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
y
x,i
=
{
1 if i x x - xBase < (i + 1) x
0otherwise
∆∆≤
The ith element of the histogram is:
hist y x i
ij
j
n
=
=
−
∑
(,)
0
1
The values of the histogram axis are the mid-point values of the intervals:
axis i x x xBase
i
=+ +∆∆/2