Can't Get ThetaZeroLocation to Work Properly Using polarplot
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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
theta = deg2rad(Angles);
rho = rand(1,81);
ax = polaraxes;
ax.ThetaZeroLocation = 'top';
polarplot(theta,rho);
Many thanks in advance for any advice or suggestions people have. Cheers!
采纳的回答
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
theta = deg2rad(Angles);
rho = rand(1,81);
ax = polaraxes;
ax.ThetaZeroLocation = 'top';
hold(ax, 'on') % <----------- hold
polarplot(theta,rho);
4 个评论
Peter Beringer
2021-12-5
Here's another example that sets the direction of the y-axis to reverse, the scale of the x-axis to log, and the color of the axes to blue. All of that is reverted by the plotting function since I did not hold the axes.
I usually do all plotting before I set graphics properties.
ax = axes();
ax.YDir = 'reverse'; % reverse direction of y axis
ax.Color = 'red'; % axis color blue
ax.XScale = 'log'; % set log scale on x axis
plot(ax, 1:5, rand(1,5))
Steven Lord
2021-12-5
This behavior is not limited to polarplot. High-level plotting functions basically call newplot before they create their lines, surfaces, etc. newplot checks certain figure and axes properties to determine how to prepare the figure and axes for those new lines, surfaces, etc. hold changes those figure and axes properties. See the documentation page for more details.
Peter Beringer
2021-12-5
编辑：Peter Beringer
2021-12-5
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