microphone plot response documentation results different from execution results

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?

Answer 1

[Honglei Chen]

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.