C-2DMatrix

STB-Style, simple, 2D matrix of doubles with a few most useful operations on matrices.

Quick Start

Download matrix.h; #define MATRIX_IMPLEMENTATION and #include "matrix.h".
Link with -lm when compiling.

Take a look at the header part of matrix.h to see all available functionality.

#include <stdio.h>

#define MATRIX_IMPLEMENTATION
#include "matrix.h"

int main() {
    matrix m1 = matrix_new(2, 1);
    matrix_set(&m1, 0, 0, 1.0);
    matrix_set(&m1, 1, 0, -1.0);

    matrix m2 = matrix_new(1, 2);
    matrix_set(&m1, 0, 0, 2.0);
    matrix_set(&m1, 1, 0, 1.5);

    matrix m3 = matrix_matmul(&m1, &m2);
    printf("m3 size - %zu x %zu\n", m3.height, m3.width);
    matrix_print(&m3, stdout);

    // Output:
    // m3 size - 2 x 2
    // 2.0 1.5
    // -2.0 -1.5

    matrix_del(&m1);
    matrix_del(&m2);
    matrix_del(&m3);
    return 0;
}

See https://github.com/nothings/stb for more info on the STB-style libraries.

No dynamic allocations

It is possible to avoid dynamic allocations of matrices altogether. This is useful if e.g. matrix sizes are known at compile time.

Take a look at test.c - most of the function don't use matrix_new/_del/_copy.

For convince, if MATRIX_NO_MALLOC is defined, declarations and definitions for functions using dynamic memory are not provided at all.

Running tests

./build_test.sh
./test