Ramda Matrices

Ramda-based library for working with matrices in JavaScript

How to use

Install this package:

npm i ramda-matrix

Import the library into your script:

import * as M from 'ramda-matrix';

Start hacking!

const A = M.parse`
   1 2/3 3
  -1 2   3
`;

console.table(M.matrixByMatrix(A,A));

Documentation

Documentation is located in src/index.ts

Features

• Strongly-typed (TypeScript)
• Purely functional
• Every function is curried
• Tiny bundle size
• Support for most common linear algebra functions and utilities:
  • parse a matrix from a string (parse)
  • add/subtract two matrices (sum, diff)
  • transpose (transpose)
  • multiply matrix by a scalar/vector/matrix(matrixByScalar, matrixByVector, matrixByMatrix)
  • compare matrices (equal, isIdentity)
  • generating matrices (identity, traverse, fill)

NOTE: you can print any matrix by calling console.table:

console.table(A);

NOTE: JavaScript is infamous for floating point rounding errors. Most of them can be metigated by rounding each cell, like this:

parseInt(cell.toFixed("3"))

Changelog

Status indicators:

• (b) signifies a breaking change
• (i) signifies change of behaviour for existing functions

1.1.2 [Hot-Fix]

• Fix a bug with parse returning NaN when line contains whitespaces at the beginning (i)

1.1.1

• Add a markowChain function
• Add a rotationMatrix function
• Improve documentation

1.1.0

• Make parse support floating-point numbers and fractions (i)
• Improve documentation
• Make function names more consistent (b)
• Remove rotate function (b)

1.0.4

• Initial release

TODO

• Add functions for elementary matrix operations
• Make det work with any matrix
• Add a rref function
• Add an inverse function
• Add a rotate function
• Add a reflect function?
• Make identity accept single argument