Array of index, should return indexed values on the same array format

Hello,

I used knnsearch to find the 100 nearest points from a set of points. I end up having a matrix m=Nx100 that lists all the indexes of the 100 closest to a point. For instance I have (matrix shortened to 4x6):

m=[1 215 106405 210 37814 21780 ; 2 197 13769 21537 40151 40168 ; 3 200 212 503 3375 3943 ; 4 241 250 262 266 271]

Here it means that

The 1st point's 6 closest points are indexes 1, 215, 106405, 210, 37814, 21780

The 2nd point's 6 closest points are indexes 2, 197, 13769, 21537, 40151, 40168

I then have a vector v which represents a weight associated to each points. Hence I would like to have a matrix, Nx100, where each value would be the v(i), something like :

[v(1) v(215) v(106405) v(210) v(37814) v(21780) ; v(2) v(197) v(13769)....................]

I am sure there is a simple way to do it, but I couldn't find the answer.

Answer 1

[Sindar]

It sounds like

weights = v(m);

should work