How to color/shade a sector of a polar plot with customized axis?

Question

matteog 2020-5-5

0
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https://ww2.mathworks.cn/matlabcentral/answers/523147-how-to-color-shade-a-sector-of-a-polar-plot-with-customized-axis

评论： matteog 2020-5-5

Dear all,

I have a problem I hope you could help me through. I am trying to obtain a polar plot like this: i.e. with some sectors colored/shaded, let's say between 30 and 60°, but I'd like to be able to do that for any sector I want, and customized axis (labels, ticks etc).

Now, this is the code I ran:

polarplot(theta, rho); %where theta and rho are my angular and radial data

pax=gca;

pax.ThetaTick= 0:45:360

pax.ThetaGrid= 'off'

pax.FontSize= 10

pax.ThetaTickLabel={'Knee Flexion','Inphase (KF - HF)','Hip Flexion','antiphase (HF - KE)','Knee Extension','Inphase (KE - HE)','Hip Extension','Antiphase (HE - KF)'}

pax.FontWeight='bold'

And what I obtain is something like this: I found no way, with gca options, to color/shade a sector, but I could customize all the rest.

Then I tried to use another option: polar instear of polarplot, with the following code:

teta= linspace(13*pi/8,15*pi/8,500);

rho = [0 100*ones(499,1)'];

a = polar(teta,rho)

patch( get(a,'XData'), get(a,'YData'),[0, 0.4470, 0.7410],'FaceAlpha',0.2)

hold on

a=polar(theta2, rho2, 'o')

%where theta and rho are the contour of the sector I'm shading, and Theta2 and Rho2 are the data I'm interested in representing

And what I get is:

Now, the good news is that I obtain my shaded sector, but I am not able to customize the axis or the thetaticks anymore as in the previous figure.