Find zero crossings in multidimensional matrix

Hello,

I have a multidimensional (5-D) matrix that is a sparse sampling of a smooth function. I would like to interpolate to find the coordinates where the matrix is zero. Does anyone know a way to do this?

Thank you Nate

Answer 1

[Bish Erbas]

Code below finds all zero elements of the example 2x2x5 matrix.

B = repmat([0 1],[2 2 5]);
B(B==0)

[Guillaume]

My understanding of the question is that the matrix does not contain the zeros. The zeros would be found by finding adjacent points that have different sign and interpolating between them.

Also, the matrix is sparse.

[Nate]

Thank you for your answer.

I think I wasn't clear. The matrix does not have zeros in it, but it crosses zero at multiple points.

I was wondering if there was anything like crossing.m in the file exchange that would work with multidimensional data.

[Nate]

Guillaume is correct. However, my matrix isn't sparse though (bad choice of words on my part).

[Bish Erbas]

Sorry for my misunderstanding.