[Scilab-users] Regarding multiply-armed equiangular (or Logarithmic) spirals

[Samuel Gougeon]

Le 16/09/2012 17:29, bkpsusmitaa a écrit :
> Actually, I want to generate a multiarmed spiral such as this:
> http://mailinglists.scilab.org/file/n4024823/Multiarmed.Spiral.png
> Can someone help?
> Regards
>    
OK, thank you for the illustration. For instance, you may use something 
like this:

a = (0:11)/12*360;       // starting angles
r = (0:30)'              // range of radii
R = r*ones(a)            // matrix of radii for all branches
A = r*ones(a)+ones(r)*a  // matrix of angles for all branches. You can 
change the f(A,R) relationship
X = R.*cosd(A)           // polar to cartesian transform
Y = R.*sind(A)           // ..
plot(X,Y)
a = gca();
a.isoview = "on";



Regards
Samuel

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