Interpolate valueson the go
Last updated a year ago by theiliad .
MIT · Repository · Bugs · Original npm · Tarball · package.json
`\$ cnpm install @theiliad/interpolatejs `
SYNC missed versions from official npm registry.

# interpolateJS

Lagrange interpolation to the rescue!

## Intro

InterpolateJS constructs a linear interpolation function `p(x)` for your provided set of x and y-values, using the Lagrange basis polynomials.

Using `.evaluate()` you can then provide an x-value to the function, and get an interpolated y-value.

## Getting started

### Installation:

``````npm i --save @theiliad/interpolatejs
``````

## Usage

import/require:

``````import { interpolation, fraction } from "@theiliad/interpolatejs/index";

const xValues = [fraction(1, 3), fraction(1, 4), 1];
const yValues = [2, -1, 7];
const pOfx = interpolation(xValues, yValues);

console.log("p(1/3) =", pOfx.evaluate(fraction(1, 3)));
// ==> p(1/3) = 2
``````

In-browser CDN Usage:

``````<script src="https://unpkg.com/@theiliad/interpolatejs"></script>
<script>
const { interpolation, fraction } = interpolateJS;

const xValues = [fraction(1, 3), fraction(1, 4), 1];
const yValues = [2, -1, 7];

const pOfx = interpolation(xValues, yValues);
console.log(
"p(1/3) =",
pOfx.evaluate(
fraction(1, 3)
)
);
</script>
``````

## Current Tags

• 1.0.6                                ...           latest (a year ago)

## 7 Versions

• 1.0.6                                ...           a year ago
• 1.0.5                                ...           a year ago
• 1.0.4                                ...           a year ago
• 1.0.3                                ...           a year ago
• 1.0.2                                ...           a year ago
• 1.0.1                                ...           a year ago
• 1.0.0                                ...           a year ago
Maintainers (1)