NONZEROS Retrieve Nonzero Matrix Entries

Section: Array Generation and Manipulations

USAGE

Returns a dense column vector containing the nonzero elements of the argument matrix. The syntax for its use is 
   y = nonzeros(x)

where x is the argument array. The argument matrix may be sparse as well as dense.

Example

Here is an example of using nonzeros on a sparse matrix. 
--> a = rand(8); a(a>0.2) = 0;
--> A = sparse(a)

A = 
	Matrix is sparse with 19 nonzeros
--> nonzeros(A)

ans = 

    0.1767 
    0.0337 
    0.1943 
    0.0846 
    0.0200 
    0.1884 
    0.0519 
    0.0745 
    0.0538 
    0.0838 
    0.0560 
    0.1657 
    0.0433 
    0.1788 
    0.1374 
    0.1702 
    0.0513 
    0.1767 
    0.0528 

--> 
quit