Hi, Agilicz, I call fortran in one of my codes... However, the output of my program is to big and somehow Mathematica does not get all of it. Nevertheless, I will insert here and maybe you can use it

First, I start a shell process and I write a line to change the shell folder to my work folder

process = StartProcess[$SystemShell];
WriteLine[process, "cd /home/path/to/folder/"]

Now, I run the program

WriteLine[process, "./prog"];

If i want to insert some input, I use the same logic

WriteLine[process, "String with input"];

Finally, I kill the process

KillProcess@process;

In my case, my Fortran code does the output of the results. So, i dont need to work with it on Mathematica.

I hope that it can help you.

Best.

Hi Rohit,

Good point, I mean a compiled, executable code. ( .exe ) . Do you possibly have a simple example?

Tx, best regards

Andras

Andras,

You should also consider RunProcess[]. It will start your program and wait for, and then return the output (if this is what you want).

Estevao -- Are you certain that your program's output is too large for MMA to read? It is possible that you are reading the output before the print is complete and the print buffer is flushed. It may be a timing issue. Another fix for this (if it really is a limitation - or the timing is problematic) is to put a C code wrapper around your FORTRAN and use WSTP to communicate -- then you can send data back and forth to your FORTRAN code.

Regards,

Neil

Andras,

Is this what you want? I would use Replace[] (Shortcut: "/."):

{1, 2, -3, -4, 2, 5} /. x_ /; x < 0 -> 0

output:

{1, 2, 0, 0, 2, 5}

if x is less then zero return 0, otherwise return the value.

Regards

Neil

@Neil, @Estevao,

Thank you very much for both of you, you saved me hours.

many happy greetings

Andras