Creating equidistant point on a 2D boundary plot

Question

Lorenzo Pollicini 2023-10-25

0
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https://ww2.mathworks.cn/matlabcentral/answers/2038266-creating-equidistant-point-on-a-2d-boundary-plot

评论： Lorenzo Pollicini 2023-10-25

Dear All,

I have a 1953x3 matrix projPoint containing the X and Y coordinates of some points. I was able to obtain the contour of the figure by using the boundary function:

K = boundary(projPoint(:,1), projPoint(:,2));
Unrecognized function or variable 'projPoint'.
plot(projPoint(K2,1), projPoint(K2,2), 'b');

I would like to create points at a equidistant distance (XY modulus = 2) following the boundary line, so that I all the new points created on the 2D line are at a equidistant distance.

I have tried to use interp function as shown:

xq= min(projPoint):2:max(projPoint);
yq = interp1(projPoint(:,1),projPoint(:,2),xq);

but I get the error:

Error using matlab.internal.math.interp1
Sample points must be unique.
Error in interp1 (line 188)
        VqLite = matlab.internal.math.interp1(X,V,method,method,Xqcol);
 