konpeito

!MIT License

"konpeito" is a library to "compute". :)

What

- The library for math calculations.
- When calculating, use method chain.
- Coding in ES6, and published ES6 modules and UMD.
- API reference is complete.

Features

This library has 4 functions.
- BigInteger
- BigDecimal
- Fraction
- Matrix

Has the following features.
- BigDecimal and Fraction are constructed by BigInteger.
- Matrix is constructed by array of Complex.
- Matrix can't use huge real numbers like BigInteger or BigDecimal, but they are powerful. Initialization can be described as Scilab, Octave, MATLAB.
- Does not support sparse matrix.

Please check the console and main.mjs.
- BigDecimal
- BigInteger
- Matrix
- UMD

Install for node.js

1. This library can be installed using npm.
``
npm install konpeito
`

2. Then you can include it in your code:
`
var konpeito = require("konpeito");
`

If you want to use in the ES6 module, please execute with the following command.
`
node --experimental-modules main.mjs
`

Install for browser

1. Download the zip by GitHub.

2. Please use mjs file when using ES6 modules. And use js file when using UMD.
- ./build/konpeito.esm.min.js
- ./build/konpeito.umd.min.js

$3


`html

`

$3

`html


`

Repository

- https://github.com/natade-jp/konpeito.git

Sample

$3

- A calculation class for arbitrary-precision integer arithmetic.
- BigInt of ES2019 is not used.

`javascript
const konpeito = require("konpeito");
const BigInteger = konpeito.BigInteger;
const $ = BigInteger.create;

console.log($("-1234567890").mul("987654321098765432109876543210").toString());
> -1219326311248285321124828532111263526900

console.log($("7").pow("50").toString());
> 1798465042647412146620280340569649349251249
`

$3

- A calculation class for arbitrary-precision floating point arithmetic.
- The calculation uses the BigInteger.

`javascript
const konpeito = require("konpeito");
const BigDecimal = konpeito.BigDecimal;
const MathContext = konpeito.MathContext;
const $ = BigDecimal.create;

BigDecimal.setDefaultContext(MathContext.UNLIMITED);
console.log($("-123456.7890").mul("987654321098765.432109876543210").toString());
> -121932631124828532112.4828532111263526900
`

$3

- A calculation class for fractions with infinite precision.
- The calculation uses the BigInteger.

`javascript
const konpeito = require("konpeito");
const Fraction = konpeito.Fraction;
const $ = Fraction.create;

console.log($("1/3").add("0.(3)").mul(10).toString());
> 20 / 3
`

$3

- Matrix is a general-purpose calculation class with signal processing and statistical processing.
- The calculation uses the Complex.
- Some methods do not support complex arithmetic.

`javascript
const konpeito = require("konpeito");
const Matrix = konpeito.Matrix;
const $ = Matrix.create;

console.log($("[1 2;3 4;5 6]").toString());
>
1 2
3 4
5 6
const USV = $("[1 2;3 4;5 6]").svd();
console.log(USV.U.toString());
>
0.2298 -0.8835 0.4082
0.5247 -0.2408 -0.8165
0.8196 0.4019 0.4082
console.log(USV.S.toString());
>
9.5255 0.0000
0.0000 0.5143
0.0000 0.0000
console.log(USV.V.toString());
>
0.7849 0.6196
-0.6196 0.7849
console.log(USV.U.mul(USV.S).mul(USV.V.T()).toString());
>
1.0000 2.0000
3.0000 4.0000
5.0000 6.0000

console.log($("[1+j 2-3j -3 -4]").fft().toString());
> -4.0000 - 2.0000i 1.0000 - 5.0000i 0.0000 + 4.0000i 7.0000 + 7.0000i

console.log($("[1 2 30]").dct().toString());
> 19.0526 -20.5061 11.0227
``