Create coordinates on a convex hull

I have a convex hull, defined by

k=convhull(x,y)
P=[x(k),y(k)]
kS=polyshape(P)
kP=perimeter(kShape)

How can I divide the perimeter of the convex hull into n (e.g. 500) equal distance/lengths, and find the respective coordinates?

Answer 1

[Bruno Luong]

% test data
xy=rand(100,2);

P=xy(convhull(xy),:);
d=[0;cumsum(sqrt(sum(diff(P).^2,2)))];
xyi=interp1(d,P,linspace(0,d(end),501)); % first point ~= last point

plot(P(:,1),P(:,2),'or',xyi(:,1),xyi(:,2),'b.-');

Answer 2

[Bjorn Gustavsson]

Perhaps this function is overkill, but to me it seems as if this FEX-contribution should help:

xy2sn, I don't know if it is the functionality of xy2sn or the sn2xy that most resembles your request.

Perhaps either of these contributions solves your problem better:

arclength, interparc. But one of these should get you at least 90% of the way.

HTH