writing a mex statement for outputting values of some variables to the console.

I am preparing a MEX file.

I want to output the values of some variables to the console.

What MEX statement can do that for me?

[dpb]

Insufficient data...MEX routines are simply the glue layer between the alternate language and MATLAB, the functionality is written with the other language -- so in Fortran you would use write statements, in C the fprintf library function.

[Magdy Hanna]

How can I specify the console as the output medium?

Using write(6 , *) did not work.

Answer 1

[Walter Roberson]

https://www.mathworks.com/help/matlab/apiref/mexprintf.html

#include "fintrf.h"
integer*4 mexPrintf(message)
character*(*) message

You would prepare the message into a character variable ahead of time, by using WRITE to the character variable. See for example https://stackoverflow.com/questions/5808034/how-to-write-output-to-a-string-in-fortran

[James Tursa]

Also note that you need to add the newline manually. E.g., something like this (CAUTION: UNTESTED)

#include "fintrf.h"
integer*4, external :: mexPrintf
integer*4 result
character*50 message
integer :: myvariable = 123
write(message,*) myvariable
result = mexPrintf( message // achar(10) ) ! adding a line feed