polar graph : invisible axis
Do someone know how to make invisible the axis of a polar graph ?
Here's an example on wich I don't manage to eliminate the axis :
rho=2.4:0.1:3.2;theta=(1/3:0.02:1/2)*%pi; z=30+round(theta'*(1+rho^2)); f=gcf(); f.color_map=hotcolormap(128); clf();graypolarplot(theta,rho,z)
Thanks in advance,