I have to plot a circle from a (2,N) matrix where x and y are the coordinates of N points around the circle. Center is (0,3) and theta=pi/2 and phi is 0-2pi.. Radius is 2. Should look like the red circle in the back on the picture
MATLAB: Circle plot from (2,N) Matrix
centercirclematrixradius
Related Solutions
Use the FAQ to draw a circle, then exponentiate:
xCenter = 12;yCenter = 10;theta = 0 : 0.01 : 2*pi;radius = 5;x = radius * cos(theta) + xCenter;y = radius * sin(theta) + yCenter;xe = exp(x);ye = exp(y);loglog(xe, ye, 'LineWidth', 2);axis square;grid on;hold on;% Draw second circle
radius = 3;x = radius * cos(theta) + xCenter;y = radius * sin(theta) + yCenter;xe = exp(x);ye = exp(y);loglog(xe, ye, 'LineWidth', 2);
If you want to fill a circular area with a particular color, you can use this code:
center=[10,20];%xy coordinates of the center
radius=15;figure(1),clf(1)%create a new figure (or bring focus to an old one and clear it)
theta=linspace(0,2*pi,100);x=radius*cos(theta)+center(1);y=radius*sin(theta)+center(2);patch(x,y,'r')daspect([1 1 1])%make data scale rectangular
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