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microphone plot response documentation results different from execution results
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I have taken an example program from MATLAB documentation as below (phased array)
freq = [500 1000];
hmic = phased.CustomMicrophoneElement(...
'PolarPatternFrequencies',freq);
hmic
hmic.PolarPattern= mag2db([...
0.5+0.5*cosd(hmic.PolarPatternAngles);...
0.6+0.4*cosd(hmic.PolarPatternAngles)]);
plotResponse(hmic,freq,'Format','Polar');
ha = phased.ULA('NumElements',4,'ElementSpacing',0.5,...
'Element',hmic);
figure;
plotResponse(ha,freq,340,'Format','Polar')
ha = phased.ULA('NumElements',4,'ElementSpacing',0.5,...
'Element',hmic);
figure;
plotResponse(ha,freq,340,'Format','Polar')
When I run the results are different in the sense that the polar angle measurement is in reverse order. In the documentation plots, the angle measurement is positive for clockwise where as I get positive for anticlockwise. Why is this?
Is the documentation to be updated?
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Antworten (1)
Honglei Chen
am 27 Mai 2015
The documentation is not up to date. Thanks for catching that. The plot is now counter clockwise so the positive angles are above 0 degrees and negative angles are below 0 degrees. This seems to match people's expectation better.
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