From cartesian to polar with points

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Francesco
Francesco 2013-5-13
Hi If i have 100 points that define vectors in this way: V=[a1,b1;a2,b2;a3,b3;a4,b4...] a1, b1 is the location of starting point a2,b2 is the location of ending points and in this way I defined the first vector (line)
a3, b3 is the location of 2nd starting point a4,b4 is the location of 2nd ending points
...
How i can convert these vectors (not from axis origin) into polar coordinates? If I use point by point it's calculated for each point from the origin.
Thanks

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回答（1 个）

Matt J
Matt J 2013-5-13
dV=diff(V,1,1);
dV(2:2:end,:)=[];
[theta,rho]=cart2pol(dV(:,1),dV(:,2));

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