# issparse

## Purpose

Check for sparse matrix storage class.

## Synopsis

    k = issparse(X)

## Description

`issparse(X)` returns 1 if the storage class of `X` is sparse and 0 otherwise. Since most of MATLAB's functions work correctly and efficiently with both sparse and full matrices, `issparse(X)` is not needed very often.

## Examples

    if issparse(X)
        nrm = normest(X);
    else
        nrm = norm(X);
    end

## See Also

    full, sparse

(c) Copyright 1994 by The MathWorks, Inc.