Frequency Response Function NxM output format

[squidmixer]

Hi,

When the Frequency Response Function for magnitude, phase, and coherence

is used in the NxM "all cross pairs" polymorphism, the format of the outputs

are still 1-D arrays of clusters instead of a 2-D NxM sized array of clusters.

Does anyone know how the indexing of this 1-D array would correspond to

indexing of the would be 2-D array?  Or is it just [index/M, index%M].

Thanks,

Kevin

[MDC]

Hi Kevin,

First, thanks for posting this request.  You've helped us find a gap in our context help.  The documentation on X-Y pairing should be improved and the VI documentation should be extended to cover all instances of this polymorphic VI.  Here is some text that should be added to the "X-Y pairing" description:

"all cross pairs" means that the pairs are formed by matching each signal from array X with ALL signals from array Y, continuing in this fashion for each signal in X. If there are N signals in X and M signals in Y, the total number of cross pairs is N x M. The paired signal results Xchan-Ychan are returned in the order 1-1, ... 1-M, 2-1, ... 2-M, ... N-M. "

Hope this helps,

Mike C

LabVIEW Math & Signal Processing

National Instruments