Changing bin edges on polar histogram

Question

JVM 2018-4-17

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https://ww2.mathworks.cn/matlabcentral/answers/395430-changing-bin-edges-on-polar-histogram

编辑： Scott MacKenzie 2021-5-6

Hi, I am making a polar histogram showing wind directions. I would like each bin to represent each tick rather than representing the directions between to ticks as shown below. How do I change that, so e.g. the bin representing North takes value from [337.5 : 22.5]?

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Stephanie Reeves 2021-4-21

I realize this was posted two years ago, but did you find the answer? I have the same problem. Currenting Googling and have come up with nothing. :/ Thank you!

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Answer 1

Scott MacKenzie 2021-5-6

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https://ww2.mathworks.cn/matlabcentral/answers/395430-changing-bin-edges-on-polar-histogram#answer_693630

编辑：Scott MacKenzie 2021-5-6

在 MATLAB Online 中打开

I suggest you work with bin edges in addition to the number of bins. Below are two examples. On the right, the bins are wind directions, as in your example, with the bins centered in each compass point.

% test data
y = 2*pi * rand(1,100);
tiledlayout('flow');
nexttile;
n = 8; % number of bins
binTheta = 360 / n;
edges = (0:binTheta:360) + binTheta/2;
edges = deg2rad(edges);
polarhistogram(y, edges);
nexttile;
n = 16; % number of bins
labels = { 'E', 'ENE', 'NE', 'NNE', 'N', 'NNW' 'NW', 'WNW', 'W', ...
    'WSW', 'SW', 'SSW', 'S', 'SSE', 'SE', 'SES'};
binTheta = 360 / n;
edges = (0:binTheta:360) + binTheta/2;
edges = deg2rad(edges);
polarhistogram(y, edges);
ax = gca;
ax.ThetaTick = 0:binTheta:360;
ax.ThetaTickLabels = labels;