Polar Scatter Plot using 3 Data Set

Question

Alexi 2023-10-4

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/2028974-polar-scatter-plot-using-3-data-set

编辑： Star Strider 2023-10-4

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?

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Alexi 2023-10-4

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 2023-10-4

编辑：Dyuman Joshi 2023-10-4

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.

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Answer 1

Star Strider 2023-10-4

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链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/2028974-polar-scatter-plot-using-3-data-set#answer_1325369

编辑：Star Strider 2023-10-4

在 MATLAB Online 中打开

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.

.