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Chapter 3 Analysis Library
© National Instruments Corporation 3-35 LabWindows/CVI Standard Libraries
Return Value
status
integer Refer to error codes in
Table 3-2.
ToRect1D
int status = ToRect1D (double magnitude[], double phaseRadians[],
int numberofElements, double outputArrayReal[],
double outputArrayImaginary[]);
Purpose
Converts the set of polar coordinate points (magnitude, phaseRadians) to a set of rectangular
coordinate points (outputArrayReal, outputArrayImaginary). The function obtains the ith
element of the rectangular set by using the following formulas.
x mag phase
ii i
=∗cos( )
y mag phase
ii i
=∗sin( )
The function performs the operations in place; that is, outputArrayReal and magnitude, and
outputArrayImaginary and phaseRadians, can be the same arrays, respectively.
Parameters
Input
magnitude
double-precision
array
Magnitude.
phaseRadians
double-precision
array
Phase (in radians).
numberofElements
integer Number of elements.
Output
outputArrayReal
double-precision
array
X coordinate.
outputArrayImaginary
double-precision
array
Y coordinate.
Return Value
status
integer Refer to error codes in
Table 3-2.