Class: Least Squares Fit (graphs, line Graph)

Name:	Least Squares Fit Support forum
Base name:	`linefit`
Description:	Plot graph with lines defined by least square fit
Search tags:	graphs, line Graph
Version:	`1`
Required PHP version:	`4`
License:	GNU General Public License (GPL)
All time users:	664 users
All time rank:	2729
Week users:	3 users
Week rank:	1972

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Supplied by:

Name: Sally Evans <e-mail contact>

Published packages: 1

Country: United Kingdom - PHP jobs in United Kingdom

Home page: ???

Age: ???

All time rank: 1530

Week rank: 1237

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Innovation Award:

October 2007
Number 6

Least squares fit is an algorithm for calculating the coordinates of a straight line that is located at a minimal distance to a set of points.

It is often used to draw scientific graphs of points that are expected to be aligned according to a linear equation.

This class can compute the coordinates and render a line that represents the least squares fit line for a given set of points.

Manuel Lemos

Groups:

Algorithms	Numerical and statistical algorithms	View top rated classes
Graphics	Colors, images, charts and picture formats	View top rated classes
Math	Math related classes.	View top rated classes

Detailed description:

This class can be used to plot graphs with lines defined by the least square fit algorithm.

It takes the coordinates of a set of points and draws lines that minimize the distance to the points using the least square fit algorithm.

The generated graph is saved to a file in PNG format.

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Files:

File	Role	Description
`Lingraph.php`	Example	Example
`Line-graph.php`	Doc.	Webpage
`plot.png`	Output	Picture
`Screenshot.jpg`	Screen	Screeenshot
`testdata.csv`	Data	Data for Line-graph.php
`ymxc.class`	Class	Class

Download all files: linefit.tar.gz linefit.zip

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Class: Least Squares Fit

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