Matrixa NPM | npm.io

const linearAlgebra = require('linear-algebra')();
const Matrix = linearAlgebra.Matrix; `
const csv = require('csvtojson');
	
const convert = require('matrixa');

const math = require('mathjs');
const csv = require('csvtojson');
	
const convert = require('matrixa');

toMatrixArray

In areas like computational decision science and operation research it is common to work with collections of matrices. This package aims to provide a parser of csv that contains data from not one but several matrices. So this is a simple library extension for csvtojson to parse that csv with an array of matrices into a usable object of mathjs or linear-algebra npm library.

Installation

npm i matrixa

Example Usage

csv()
  .fromFile(csvFilePath)
  .then((jsonObj) => {
      

console.log(convert.toMatrixArray(jsonObj, 'mathjs')[1]);


  });

Returns:

{ data: [ [ 1, 3, 0.33 ], [ 0.33, 1, 0.2 ], [ 3, 5, 1 ] ],
  rows: 3,
  cols: 3 }

csv()
  .fromFile(csvFilePath)
  .then((jsonObj) => {
      

console.log(convert.toMatrixArray(jsonObj, 'linear-algebra')[1]);


  });

Returns:

Matrix {
  _data: [ [ 1, 3, 0.33 ], [ 0.33, 1, 0.2 ], [ 3, 5, 1 ] ],
  _size: [ 3, 3 ],
  _datatype: undefined }

Documentation

Argument	Description	Mandatory	Type	Rules
jsonObj	jsonObj is the json array that contains the data from the csv.	True	JSON Array	Each row MUST contain the data of a matrix, rows separated by a blank column.
package	package speficies which package you are using.	True	String	This argument MUST be a string containing 'mathjs' or 'linear-algebra' depending on the package the user wants to use.