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Chapter 2 NI-DSP Analysis VI Reference
NI-DSP SRM for LabVIEW for Windows 2-66 Part 3: NI-DSP Function Reference
DSP Rectangular To Polar
Converts a set of rectangular coordinate
points (X, Y) to a set of polar coordinate
points (Magnitude, Phase). The i
th
element of the polar coordinate set is
obtained by using the following fomulas:
Magnitude(i) = X(i)
2
+Y(i)
2
Phase(i) = arctan(Y(i)/X(i))
Note: The operation is perfomed in place and the input arrays X and Y are overwritten by Magnitude and Phase.
X is the DSP Handle Cluster that indicates the memory buffer on the DSP board that contains the
input signal array X.
Y is the DSP Handle Cluster that indicates the memory buffer on the DSP board that contains the
input signal array Y.
Magnitude is the DSP Handle Cluster that is identical to X but with the caculated polar coordinate
amplitude values already stored in the memory buffer on the DSP board.
Phase is the DSP Handle Cluster that is identical to Y but with the caculated polar coordinate phase
values already stored in the memory buffer on the DSP board.
error in(no error) contains the error information from a previous VI. If an error occurs, it is passed
out error out and no other calls are made.
error out contains the error information for this call.