Running MATLAB with a shell script, redirecting stdin and stdout

Let's say I have this MATLAB function

function a = testfun(in1, in2)
a=in1+in2;
disp(a);

I would like to have a shell script that runs on Cygwin as follows:

./testscript.sh < inputforfunction.txt > outputoffunction.txt

The input file would contain in1 and in2. After running this command, the output file will contain the result of running testfun(in1,in2), namely 3 if in1=1 and in2=2, for example.

What I have till now is:

#!/bin/sh
matlab -nodesktop -nosplash -r "try, testfun($1,$2); end; quit;"

Executing the below opens MATLAB's command window, prints 40, then exits.

./testscript.sh 23 17

However, I don't know how to redirect the input to a text file, save the printed output of the MATLAB function somewhere, then redirect it to the output file.

Thanks!

Answer 1

[Robert Cumming]

help diary

[Elias Khalil]

Hi Robert. Thanks for this, it inspired me to use -logfile which is similar. Still haven't got to make the redirection work though.

Answer 2

[Walter Roberson]

If you want to accept inputs from a file that has been redirected, then you need to use input() to read from the file.

[Elias Khalil]

Hey Walter, thanks. I understand that "input(msg)" asks for user input, how can this be used to read input from a file and pass it to a MATLAB function in a shell script?

[Walter Roberson]

#!/bin/sh
matlab -nodesktop -nosplash -r "try; vs = input('','s'); v =sscanf(v, '%f'); testfun(v(1),v(2)); end; quit;"

OR

#!/bin/sh
read in1 in2
matlab -nodesktop -nosplash -r "try; testfun($in1,$in2); end; quit;"