ISSPARSE Test for Sparse Matrix

Section: Inspection Functions

Usage

Test a matrix to see if it is sparse or not. The general format for its use is 
   y = issparse(x)

This function returns true if x is encoded as a sparse matrix, and false otherwise.

Example

Here is an example of using issparse: 
--> a = [1,0,0,5;0,3,2,0]

a = 
 1 0 0 5 
 0 3 2 0 

--> issparse(a)

ans = 
 0 

--> A = sparse(a)

A = 
 1 1 1
 2 2 3
 2 3 2
 1 4 5
--> issparse(A)

ans = 
 1