find the index of Curve intersections

Hi all,

I am programing to find the indexes of the intersections of two lines. I use the code Curve intersection by NS to find the intersection value but am not able to find the indexes of the intersection value using the 'k = find(y==constant)'. I think the reason is that the intersections are not in the two lines, so it returens back to null.

Thank you in advance.

kind regards.

Answer 1

[KSSV]

Use knnsearch. This will give you the exact point if exists...or the nearest point to the intersection.....

Answer 2

[Yang Lu]

Hi,

I use InterX reference from https://uk.mathworks.com/matlabcentral/fileexchange/11837-fast-and-robust-curve-intersections to find the intersection coordinates first and then use 'find' command to search the shortest arc-length which is corresponding to the index of the intersection coordiantes.

Thank you.