Axes of polar plot

104 views (last 30 days)
alberto tonizzo
alberto tonizzo on 15 Aug 2022
Commented: alberto tonizzo on 16 Aug 2022
Hi,
I'm plotting a contour plot on top of a polar plot but I can't see the axes (rho?) underneath the contour plot. Does anyone know how to do that?
The code I'm using and the generated figure are below.
Thank you!
% Creating mesh
[phi_HL_upwelling_Mesh,theta_HL_upwelling_Mesh]= meshgrid(deg2rad(phi_HL_upwelling),(theta_HL_upwelling));
% Convert to Cartesian
x = (180 - theta_HL_upwelling_Mesh).*cos(phi_HL_upwelling_Mesh);
y = (180 - theta_HL_upwelling_Mesh).*sin(phi_HL_upwelling_Mesh);
% 2D matrix
z = squeeze(rrs_upwelling(i_st,:,:,i_lambda));
h = polar(x,y);
hold on;
contourf(x,y,z);
set(h,'Visible','off');
axis image;
  2 Comments
alberto tonizzo
alberto tonizzo on 16 Aug 2022
I'd rather not doing it manually, I have quite a few plots to make. Thanks.

Sign in to comment.

Accepted Answer

Walter Roberson
Walter Roberson on 16 Aug 2022
%when you use polar() the lines are given hidden handles
ax = gca;
LL = setdiff(findall(ax, 'Type', 'line'), ax.Children);
You can now proceed to set ZData on each member of LL to something that is above the contourf plot. Some of the entries in LL will have only 2 data points,
For example,
zoff = 10;
set(LL, {'ZData'}, cellfun(@(C) C*0 + zoff, {LL.XData}, 'uniform', 0).')
The content of the XData is multiplied by 0, to give a zero vector the same size; zoff is added to give a constant vector.
It could instead have been coded as
zoff = 10;
set(LL, {'ZData'}, cellfun(@(C) zoff*ones(size(C)), {LL.XData}, 'uniform', 0).')
Using the property name inside a cell array is a trick that is not well documented. set() allows you to set multiple properties at once, or set properties for multiple objects, if you use a cell array for the property name(s)
  3 Comments
alberto tonizzo
alberto tonizzo on 16 Aug 2022
Would you be able to write a few lines of code? I'm not familiar with patch nor findall.
Thank you so much!

Sign in to comment.

More Answers (0)

Products

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!