Change Backgroundcolour of Plot

Hey I created a polarplot of a matrix with 3 colums so the polarplot has 3 "circles". I want to change the Background colour between the first and third "circle" to grey

[KSSV]

Show us the code you tried.

Answer 1

[Star Strider]

Try this for a start —

a = linspace(0, 2*pi, 200);
r = [1;2;3]*ones(size(a));
[A,R] = pol2cart(a.',r.');
radials = linspace(0, 2*pi, 13);
circs = [0; max(r(:,1))]*ones(size(radials));
[Arad,Rrad] = pol2cart(radials,circs);                                      % Radials
[Acrc,Rcrc] = pol2cart(a,(0:0.5:max(r(:,1)))'*ones(size(a)));               % Circles

figure
plot(A, R, 'LineWidth',2)
hold on
plot(Arad, Rrad, '-k')
plot(Acrc', Rcrc', '-k')
[X,Y] = pol2cart([a flip(a)], [r(1,:) flip(r(3,:))]);
patch(X, Y, [1 1 1]*0.25, 'FaceAlpha',0.2, 'EdgeColor','none')
hold off
axis('equal')
set(gca,'Visible','off')
d30 = deg2rad(30);
text(cos(d30)*Acrc(:,1), sin(d30)*Acrc(:,1), compose('%.1f',Acrc(:,1)), 'Horiz','center', 'Vert','top', 'Rotation',30)
text(Arad(2,1:end-1)*1.1, Rrad(2,1:end-1)*1.1, compose('%.0f°',rad2deg(radials(1:end-1))), 'Horiz','center', 'Vert','middle')

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