Specs:

$gcc-7 --version
gcc-7 (Homebrew GCC 7.3.0_1) 7.3.0
Copyright (C) 2017 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

$elixir --version
Elixir 1.6.1 (compiled with OTP 20)

Compilation

gcc-7 -undefined dynamic_lookup -dynamiclib niftest.c -o niftest.so -I /usr/local/Cellar/erlang/20.2.4/lib/erlang/usr/include

Usage

Change compilation in test file and run ./test

Docs

EMatrix: list of lists of doubles

EVector: list of doubles

Matrix: custom data type (ERL_NIF_TERM)

Vector: custom data type (ERL_NIF_TERM)

---

make_vector(EVector) -> Vector

make_matrix(EMatrix) -> Matrix

make_list(Vector) -> EVector

make_deep_list(Matrix) -> EMatrix

vsum(Vector, Vector) -> Vector

msum(Matrix, Matrix) -> Matrix

scale(double, Vector) -> Vector

scale(double, Matrix) -> Matrix

get_col(int, Matrix) -> Matrix

get_row(int, Matrix) -> Matrix

get_col(int(1 or -1), Matrix) -> Matrix

mult(Matrix, Vector) -> Vector

mult(Matrix, Matrix) -> Vector