mxIsDouble (External Interfaces Reference)

Determine if mxArray is of type double

Fortran Syntax

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

Arguments

pm
Pointer to an mxArray.

Returns

Logical 1 (true) if mxArray is of type double; and logical 0 (false) otherwise. If mxIsDouble returns 0, the array has no Fortran access functions and your Fortran program cannot use it.

Description

Call mxIsDouble to determine whether or not the specified mxArray represents its real and imaginary data as double-precision, floating-point numbers.

Older versions of MATLAB store all mxArray data as double-precision, floating-point numbers. However, starting with MATLAB 5, MATLAB can store real and imaginary data in a variety of numerical formats.

Calling mxIsDouble is equivalent to calling

```
mxGetClassName(pm) .eq. 'double'
```

mxIsComplex mxIsEmpty