nnz
number of non zero entries in a matrix
Syntax
n=nnz(X)
Arguments
- X
real or complex sparse (or full) matrix
- n
integer, the number of non zero elements in X
Description
nnz counts the number of non zero entries in a sparse or full matrix
Examples
sp=sparse([1,2;4,5;3,10],[1,2,3]); nnz(sp) a=[1 0 0 0 2]; nnz(a)
See also
- spget — retrieves entries of sparse matrix
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