# size

## Purpose

Matrix dimensions.

## Synopsis

    d = size(X)
    [m n] = size(X)
    m = size(X,1)
    n = size(X,2)

## Description

`d` `=` `size(X)`, where `X` is an `m`-by-`n` matrix, returns a vector with two integer components, `d` `=` ``[m n].

`[m n]` `=` `size(X)` `size` returns the two integers in two separate variables.

With a second input argument

`m` `=` `size(X,1)` returns the row size of `X`.

`n` `=` `size(X,2)` returns the column size of `X`.

## See Also

    exist, length, whos

(c) Copyright 1994 by The MathWorks, Inc.