Polar Scatter Plot using 3 Data Set

Hello, I am trying to draw a polar chart using 3 data sets. The first data set is the set value, the second data set indicates at which azimuth this value set will be found. Finally, color changes need to be made in the value ranges in the primary value setting. How do I do this?

[Dyuman Joshi]

polarscatter

[Alexi]

But how to add third value ? is this correct ? I added the 3rd value set as an example. How do I adjust the color scale according to the size of the values of the elements of the 3rd value set?

clc;

clear;

th = linspace(0,2*pi,20);

r = rand(1,20);

a=[1:1:20];

sz = 75;

polarscatter(th,r,sz,a,'filled')

[Dyuman Joshi]

From what I understood - The 4th input to polarscatter() corresponds to the colors of the markers. So you should provide the values (variable a in your case) accordingly.

Check out the Marker Colors sub-section in the Input Arguments section of the documentaion for more info.

Answer 1

[Star Strider]

Try this —

th = linspace(0,2*pi,20);
r = rand(1,20);
a=[1:1:20];
sz = 75;
% polarscatter(th,r,sz,a,'filled')  

[x,y,z] = pol2cart(th, r, a);

tv = linspace(0, 360, 13);
tv2 = linspace(0, 359, 360);
rc = 1;

figure
scatter3(x,y,z,50,z,'filled')
hold on
plot3((rc*[1;1]*cosd(tv)), (rc*[1;1]*sind(tv)), ([0;20]+rc*ones(size(tv))), ':k')
plot3((rc*[0;1]*cosd(tv)), (rc*[0;1]*sind(tv)), (rc*[1;1]*ones(size(tv))), ':k')
plot3((rc*[0;1]*cosd(tv)), (rc*[0;1]*sind(tv)), (20+rc*[1;1]*ones(size(tv))), ':k')
plot3((rc*cosd(tv2)), (rc*sind(tv2)), (20+rc*[1;1]*ones(size(tv2))), ':k')
plot3((rc*cosd(tv2)), (rc*sind(tv2)), (0+rc*[1;1]*ones(size(tv2))), ':k')
hold off
text((1.15*rc*cosd(tv(1:end-1))), (1.15*rc*sind(tv(1:end-1))), (0+rc*ones(size(tv(1:end-1)))), compose('%3d°',tv(1:end-1)), 'Horiz','center', 'Vert','middle')
set(gca,'Visible',0)

EDIT — (4 Oct 2023 at 15:23)

Tweaked plot grid & tick labels.

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