nmatrixjs

MatrixJs

MatrixJs is a small Javascript Library use to compute matrix

Usage

MatrixJs can do basic computing of matrix. such as - Finding Determinant, Transponse, Minor, Adjoint and more - Inversing

Tutorials

1. First We Import Matrix from MatrixJs

import Matrix from "./MatrixJS";

2. To Create a Matrix we initate a Matrix class with 2 Dimenstional Array

let MyMatrix = new Matrix([
	[1, 2, 3],
	[4, 5, 6],
	[7, 8, 9],
]);

3. To access the matrix use

console.log(MyMatrix.matrix);

Size of Matrix

returns an array of [row, column]

let size = MyMatrix.size();
let [row, column] = MyMatrix.size();

console.log(size); // [3, 3]

Determinant

let determinant = MyMatrix.det();

or without creating a variable for the matrix

let determinant = new Matrix([
	[1, 2, 3],
	[4, 5, 6],
	[7, 8, 9],
]).det();

Inverse

let inverse = MyMatrix.inverse();

or you can just change the matrix by passing true as a parameter

MyMatrix.inverse(true);

Transponse

let transposed = MyArray.transponse();

or to change the Matrix itself pass true parameter

MyMatrix.transponse(true);
console.log(MyMatrix.matrix);

/*
[
    [1, 4, 7],
    [2, 5, 8],
    [3, 6, 9]
]
*/

Cofactor, Minor

Cofactor and Minor take two arguments row and column

let cofactor = MyMatrix.cofactor(0, 1); // 6
let minor = MyMatrix.minor(0, 0); // -6