compiled matlab script where incorrect variables are passing

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nines
nines 2025-7-8
评论： Star Strider 2025-7-9
Hello,
I compiled a matlab script and am submitting it as a job in bash:
#!/bin/bash
# Generates and submits one SLURM job per slice, using the compiled
# TSE_multispinecho_EPG executable + MATLAB Runtime.
# ------------- USER‑ADJUSTABLE PARAMETERS --------------------------
PROJECT_DIR="/path/to/dir"
PROJECT_NAME="project"
SLICE=1
SUBJECT_CODE='subj1'
EXEC="$PROJECT_NAME/bin/TSE_multispinecho_EPG" # compiled executable
# -------------------------------------------------------------------
cat > "$JOB" <<EOF
#!/bin/bash
echo " slice : ${SLICE}"
"${EXEC}" "${PROJECT_DIR}" "${PROJECT_NAME}" "${SUBJECT_CODE}" "${SLICE}"
EOF
# ---- submit -----
sbatch "$JOB"
done
and then the beginning of the matlab functions looks like:
function TSE_multispinecho_EPG(project_directory, project_name, subject_code, slice);
%% TSE multi spin echo EPG
fprintf('slice within function: %d\n', slice);
and the slice number should be 1. When I run the bash command, I get '1', but when it gets the matlab part of the script I am getting '49'.
I cleared the cache, I made sure there weren't any extra slice variables causing renaming issues.
I can run the non-compiled command just fine, and then slice 1 will be printed correctly:
matlab -nodisplay -nosplash -r "TSE_multispinecho_EPG("/projectdir", "projectname", "subj01", "1")"
Any help would be much appreciated,
Thanks.

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采纳的回答

Star Strider
Star Strider 2025-7-8
编辑：Star Strider 2025-7-8
Ran in:
The '49' is the ASCII code for '1' --
Q = double('1')
Q = 49
Mystery solved!
You may need to change parts of your code, or perhaps use the str2double function --
N = str2double('1')
N = 1
It all depends on what you want to do, and the result you want.
EDIT -- (8 Jul 2025 at 19:26)
The problem may be here:
slice = '1';
fprintf('slice within function: %d\n', slice)
slice within function: 49
so one option could be --
fprintf('slice within function: %s\n', slice);
slice within function: 1
.
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更多回答（1 个）

Walter Roberson
Walter Roberson 2025-7-8
Ran in:
Note that
double('1')
ans = 49
so somehow you are getting a quoted 1 instead of a numeric 1.
I would suggest trying
matlab -nodisplay -nosplash -r "TSE_multispinecho_EPG("/projectdir", "projectname", "subj01", 1)"
  1 个评论
Walter Roberson
Walter Roberson 2025-7-8
Ah, I did not notice that the executable was compiled. Compiled executables always receive their parameters as strings, never as actual numeric values.

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