Matrix js

light module to create, count, operate, and manipulate. matrix 2D, matrix 3D and vector

installation

install using npm

# using npm
npm install matrix-nodejs --save

how to usage

basic rules

// must require with dustructuring object
// import object matrix
const { matrix } = require("matrix-nodejs")
// import class Matrix
const { Matrix } = require("matrix-nodejs")
// or import object matrix & class Matrix
const { matrix, Matrix } = require("matrix-nodejs")

// example
let A = [
   [1, 2],
   [3, 4]
  ]
let B = [
   [5, 6],
   [7, 8]
  ]
// example initialize matrix
const A = new Matrix(a)
A.addition(a, b) // incorrect
A.addition(b) // correct

// example without initialize matrix
matrix.addition(a) // incorrect
matrix.addition(a, b) // correct

declare matrix

const { matrix } = require("matrix-nodejs")

/* matrix a (2D) */
let a = [
    [1, 2],
    [3, 4]
  ]
  
/* matrix b (3D) */
let b = [
    [1, 2, 3],
    [4, 5, 6],
    [7, 8, 9]
  ]
  
// initialize matrix A from array a
let A = new Matrix(a)

example usage

basic usage

const { 
  matrix, // object 
  Matrix // class
} 
= require("matrix-nodejs")

// create array matrix
const a = [
    [1, 2],
    [3, 4]
  ]
const b = [
    [5, 6],
    [7, 8]
  ]
const c = [
    [9, 0],
    [1, 2]
  ]
  
const result = matrix.addition(a, b) // return array matrix a + b

// initialize matrix from array
const C = new Matrix(c)

// just call method without passing matrix in argument function
console.log(C.size())

// passing matrix to addition with matrix initialized
console.log(C.addition(a)) // matrix c + matrix a
console.log(result) // result matrix a + b

multiple matrix

const { matrix } = require("matrix-nodejs")
const a = [
    [1, 2],
    [3, 4]
  ]
const b = [
    [5, 6],
    [7, 8]
  ]
const c = [
    [9, 0],
    [1, 2]
  ]

const AxB = matrix.multiple(a, b) // return array matrix
const multiple = matrix.multipleX(1/2, a) // return array matrix

// initialize matrix C from array c
const C = new Matrix(c)

C.multipleX(1/2) // return c * 1/2
C.multiple(b) // return c * 1/2

console.log(AxB) // result matrix a * b
console.log(multiple) // result 1/2 * matrix a

vector

cross vector

const { vector } = require("matrix-nodejs")

/* generate arrat vector from I-J-K */
// example i + 2j + 3k
let a = vector.generate({
  i: 1,
  j: 2,
  k: 3
})

// example string vector (strict space)
let b = vector.destruct("- 2j + 3i - k") // return array

let AxB = vector.cross(a, b) // return object
let angle = vector.angle(a, b) // return number

console.log(AxB.string) // - 11i - 5j + 7k
console.log(AxB.matrix) // [ [-11], [-5], [7] ]
console.log(angle) // 86 degree

list properties

matrix

• addition (matrix a + matrix b)
• subtraction (matrix a - matrix b)
• det2D (determinant matrix 2D)
• det3D (determinant matrix 3D)
• dot (matrix a . matrix b)
• multiple (matrix a * matrix b)
• multipleX (any * a matrix)
• length (count total length of matrix)
• rows (count total rows of matrix)
• invers (return invers matrix)
• transpost (return transpost matrix)
• size (return dimension of matrix)

vector

• generate (generate array vector)
• destruct (destruct array vector from string)
• cross (multiple cross two vector)
• angle (find angle of two vector)

built with ❤️ by Fiandev