engEvalString (Fortran)

Evaluate expression in string

Fortran Syntax

#include "engine.h"
integer*4 engEvalString(ep, string)
mwPointer ep
character*(*) string

Description

engEvalString evaluates the expression contained in string for the MATLAB^® engine session, ep, previously started by engOpen.

UNIX Operating Systems

On UNIX^® systems, engEvalString sends commands to the MATLAB workspace by writing down a pipe connected to the MATLAB stdin process. MATLAB reads back from stdout any output resulting from the command that ordinarily appears on the screen, into the buffer defined by engOutputBuffer.

To turn off output buffering in Fortran, use:

engOutputBuffer(ep, '')

Microsoft Windows Operating Systems

On a Windows^® system, engEvalString communicates with MATLAB using a Component Object Model (COM) interface.

Input Arguments

expand all

`ep` — Pointer to engine
`mwPointer`

Pointer to engine, specified as mwPointer.

`string` — Expression to evaluate
`character()`

Expression to evaluate, specified as character*(*).

Output Arguments

expand all

`status` — Status
`integer*4`

Status, returned as integer*4. The function returns 1 if the engine session is no longer running or the engine pointer is invalid or NULL. Otherwise, returns 0 even if the MATLAB engine session cannot evaluate the command.

Examples

See these examples in matlabroot/extern/examples/eng_mat:

fengdemo.F for a Fortran example.

Version History

Introduced before R2006a