PHP Classes

Least Squares Fit: Plot graph with lines defined by least square fit

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linefit 1GNU General Publi...4Algorithms, Graphics, Math


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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PHP Programming Innovation award nominee
October 2007
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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.

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  • Screenshot.jpg
  Files folder image Files  
File Role Description
Accessible without login Plain text file Lingraph.php Example Example
Accessible without login Plain text file Line-graph.php Doc. Webpage
Accessible without login Image file plot.png Output Picture
Accessible without login Plain text file testdata.csv Data Data for Line-graph.php
Plain text file ymxc.class Class Class

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