# Can't Get ThetaZeroLocation to Work Properly Using polarplot

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Peter Beringer on 4 Dec 2021
Edited: Peter Beringer on 5 Dec 2021
Hi all,
I have binaural audio measurements made with a head and torso simulator on a turntable. Impulse response were measured for 81 angles at 3° increments (so, 240° to 120° via 0°) to cover the maximum rotation of a human head (and beyond). So, the angle values are a vector ...
Angles = [240:3:357, 0:3:120]; % Vector of angle/azimuth positions
But when I try to plot with the zero location at 'top' (i.e., "north", "12 o'clock", etc.), it stays at the default of 'right. No other directions work either. My feeling is that the ordering of my angles vector is interfering, but I have no idea why - it plots how I'd like, just on its side.
The example here works fine:
... but not with my angle vector as the theta value, which is what leads me to think that's the issue. The full plotting code I'm using (with random numbers for simulated data) is ...
Angles = [240:3:357, 0:3:120]; % Vector of angle/azimuth positions
rho = rand(1,81);
ax = polaraxes;
ax.ThetaZeroLocation = 'top';
polarplot(theta,rho);
Many thanks in advance for any advice or suggestions people have. Cheers!

Adam Danz on 4 Dec 2021
Edited: Adam Danz on 4 Dec 2021
You have to either hold the axes after setting ThetaZeroLocation or set ThetaZeroLocation after plotting. Otherwise, when you plot using polarplot it resets the properties.
Angles = [240:3:357, 0:3:120];
Angles = [240:3:357, 0:3:120]; % Vector of angle/azimuth positions
rho = rand(1,81);
ax = polaraxes;
ax.ThetaZeroLocation = 'top';
hold(ax, 'on') % <----------- hold
polarplot(theta,rho);
Peter Beringer on 5 Dec 2021
Edited: Peter Beringer on 5 Dec 2021
Thanks both of you for giving me clarification on that. The weird thing is that after getting an answer, I then looked at some other plotting code of mine, I've always specified properties after the plotting function call. Why on earth I thought this needed to be specfied prior I'll never know (stupidity would be a good guess). Oh, well, live and learn ... haha.
Thanks again!

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