MATLAB: Finding second smallest element in a row.

Question

I have a row

X = [441 137 594 507 417 581 312 362 263 151 472 512 129 70 298 255 442 574 289 157 0];

I want to find the second smallest (non zero) element from X along with the column number.

Answer 1

X = [441 137 594 507 417 581 312 362 263 151 472 512 129 70 298  255 442  574 289  157 0];
out=min(setdiff(X,min(X)))

or

M=sort(X)
out=M(2)