This package is a fork of https://travis-ci.org/Tom-Alexander/regression-js, which is no longer maintained.
regression-js is a JavaScript module containing a collection of linear least-squares fitting methods for simple data analysis.
This module works on node and in the browser. It is available as the '@jazeee/regression' package on npm.
npm install --save @jazeee/regression
import regression from '@jazeee/regression';
const result = regression.linear([[0, 1], [32, 67], [12, 79]]);
const gradient = result.equation[0];
const yIntercept = result.equation[1];
Data is passed into the model as an array. A second parameter can be used to configure the model. The configuration parameter is optional. null
values are ignored. The precision option will set the number of significant figures the output is rounded to.
Below are the default values for the configuration parameter.
{
order: 2,
precision: 2,
}
-
equation
: an array containing the coefficients of the equation -
string
: A string representation of the equation -
points
: an array containing the predicted data in the domain of the input -
residuals
: an array containing the difference between predicted data and source data in the domain of the input -
r2
: the coefficient of determination (R2) -
predict(x)
: This function will return the predicted value
Fits the input data to a straight line with the equation . It returns the coefficients in the form [m, c]
.
Fits the input data to a exponential curve with the equation . It returns the coefficients in the form [a, b]
.
Fits the input data to a logarithmic curve with the equation . It returns the coefficients in the form [a, b]
.
Fits the input data to a power law curve with the equation . It returns the coefficients in the form [a, b]
.
Fits the input data to a polynomial curve with the equation . It returns the coefficients in the form [an..., a1, a0]
. The order can be configure with the order
option.
const data = [[0,1],[32, 67] .... [12, 79]];
const result = regression.polynomial(data, { order: 3 });
- Install the dependencies with
npm install
- To build the assets in the
dist
directory, usenpm run build
- You can run the tests with:
npm run test
ornpm run test -- --watch
. npm run lint --fix