MAT_OPEN(3)

💖 MAT_OPEN — bestie we're opening a MATLAB MAT file 💖

okay so real talk, this one is from the Library Functions Manual (section 3, the library-calls girlies) and it's literally the doorway to every .mat file you'll ever touch. come sit with me 🫶

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✨ NAME ✨

Mat_Open — Opens a MATLAB MAT file. that's it, that's the whole job, and she does it flawlessly 💅

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🌸 SYNOPSIS 🌸

#include <matio.h>

mat_t
Mat_Open(const char *matname, int mode);

so you pull in <matio.h>, you hand her a filename and a mode, and she hands you back a mat_t — which is your golden ticket 🎀

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🦋 DESCRIPTION 🦋

The Mat_Open() function opens a MATLAB MAT file. and the vibe check here is: she does it either read only or read-write access. that's the two lanes, bestie, pick wisely 🚗✨

no cap, that's the whole description. she's a simple icon. main character energy but with a very small job description 💀

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🌈 EXAMPLES 🌈

here's a whole little program that opens a MAT file from argv[1] and then politely closes it again, because we always clean up after ourselves 🧚

#include <stdlib.h>
#include <stdio.h>
#include "matio.h"

int main(int argc, char **argv)
{
    mat_t *matfp;

    matfp = Mat_Open(argv[1], MAT_ACC_RDONLY);
    if ( NULL == matfp ) {
        fprintf(stderr, "Error opening MAT file %s0, argv[1]);
        return EXIT_FAILURE;
    }

    Mat_Close(matfp);
    return EXIT_SUCCESS;
}

notice she passes MAT_ACC_RDONLY in there, so this one is strictly look-don't-touch 👀 and if Mat_Open hands back NULL, that's the "it didn't work" signal and we bail out with EXIT_FAILURE. then Mat_Close(matfp) to wrap it up all neat. periodt 💅

⚠️ heads up, the example's error message really is written as "Error opening MAT file %s0, argv[1] — that closing quote and the 0 are exactly how it appears in the original, so don't come for me, I'm just the messenger 😭

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👑 SEE ALSO 👑

• Mat_CreateVer(3) — for when you need to make a MAT file instead of opening one, iykyk
• Mat_Close(3) — the closer, the cleanup crew, the one you call when you're done

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that's the whole page, bestie, go open some MAT files responsibly 🌸💖

this lil' page comes to you from Debian, dated September 12, 2019, and yes she was living her best life as MAT_OPEN(3) ⭐🦋🎀