I have a stream function for a tornado and I watned to plot it using contour function, but it's not working:
m1=-3000;m2 = 5800;%strength
[r,theta] = meshgrid(-20:1:20,0:0.1:2*pi);psi = (m1/(2*pi))*theta + (m2/(2*pi))*log(r);contour(r,theta,psi);
How should I fix it so the plot looks something like this:
I also want to plot a circle in the middle with radius r = a constant value
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