How to create a color plot based on the number of occurance?

Hi! I have a polar plot and we can see most of the data points fall within the 0° and 180° line. And the rest of the points are uniformly scattered. I want to plot a color graph that changes the color with the number of occurance in that region. For example, intense red color in the 0° and 180° line and white color where there is less data point.

The r and theta values are attache din this question. Any feedback will be greatly aprpeciated!!

[Walter Roberson]

https://www.mathworks.com/matlabcentral/fileexchange/67597-cirheatmap maybe?

Answer 1

[Hyunuk Ha]

The most easiest way is : use your r data as color map.

I made simple example as :

load('theta.mat');

load('r.mat');

polardata = [r, theta];

polardata = rmmissing(polardata);

figure; polarscatter(polardata(:,1),polardata(:,2), [], polardata(:,2));

colormap(gca,'parula') % Change colormap as you want.