# mxIsDouble

## Purpose

Inquire if the Matrix is of type double.

## C Synopsis

    int mxIsDouble(pm)
      Matrix *pm;

## Fortran Synopsis

    integer*4 function mxIsDouble(pm)
    integer*4 pm

## Arguments

`pm`
  pointer to Matrix structure

## Description

This routine allows you to determine whether or not a Matrix contains double-precision numbers. At the moment, it always returns 1, but we recommend its use so that, in the event new data types are introduced into MATLAB, your existing MEX-file code will be more robust.

(c) Copyright 1994 by The MathWorks, Inc.