mematrica

an easy to use library for working with matrices.

Features

• Matrix-scalar addition, substraction, multiplication
• Matrix-matrix addition, substraction, multiplication
• Matrix indexing
• Matrix determinant search
• Inverse matrix search
• Matrix transpose
• Matrix from file reading
• Matrix to file writing

Usage

[dependencies]
mematrica = "0.2.2"

Examples

extern crate mematrica;

use mematrica::*;

fn main() {
    let mut matrix_2x2 = Matrix2::new(1, 2, 3, 4); // creates a matrix 2x2 with elements 1, 2, 3, 4
    
    let double = matrix_2x2 * 2; // multiplies matrix on 2

    assert_eq!(vec![vec![2, 4], vec![6, 8]], double.get_elements()); 
}

Using from_vec()

extern crate mematrica;

use mematrica::*;

fn main() {
    let matrix_2x2 = Matrix2::from_vec_as_rows(vec![1, 2]);

    assert_eq!(vec![vec![1, 2], vec![1, 2]], matrix_2x2.get_elements()); 
}

to_file() & from_file() example

extern crate mematrica;

use mematrica::*;

fn main() {
    let m = Matrix2::new(1, 2, 3, 4);
    m.to_file(String::from("./src/bin/file.txt"), ',');

    let q = Matrix2::<i32>::from_file(String::from("./src/bin/file.txt"), ',');

    assert_eq!(vec![vec![1, 2], vec![3, 4]], q.get_elements());
}

Other ways to create matrix

• zero: creates a matrix with zeros as its elements
• one: creates a matrix with ones as its elements
• identity: creates an identity matrix
• from_file: reads matrix from file
• from_element: creates a matrix from element
• from_vec: creates matrix from vector as its rows or columns (from_vec_as_rows or from vec_as_columns)

Get element by index

extern crate mematrica;

use mematrica::*;

fn main() {
    let mut matrix_2x2 = Matrix2::new(1, 2, 3, 4);

    assert_eq!(1, matrix_2x2[(0, 0)]);

    // change element
    matrix[(0, 0)] = 2;
    assert_eq!(2, matrix_2x2[(0, 0)]);
}

Elementary operations

extern crate mematrica;

use mematrica::*;

fn main() {
    let m1 = CMatrix::from_element(2, 2, 4);
    let m2 = Matrix2::from_element(2);

    assert_eq!(vec![vec![16, 16], vec![16, 16]], (m1*m2).get_elements()); //also can use '+' '-'
}

You can find more examples in examples folder