File:LinearRegression.svg

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Summary

DescriptionLinearRegression.svg	Illustration of linear regression on a data set.
Date	24 June 2007
Source	self-made in Gnuplot.
Author	Berland
Other versions	Italian version

Gnuplot source code

set terminal svg fname "Helvetica" fsize 25
set output "LinearRegression.svg"
set key left
set xtics axis 4.0,0.5
set ytics nomirror 1
set border 2
f(x) = a*x + b
fit f(x) 'randpts' using 1:2 via a,b
set yrange [-0.9:4]
plot 'randpts' with points pointtype 7 pointsize 0.3 title 'Datapoints', \
	f(x) with lines linetype 3 linewidth 3 title 'Regression',  \
	0 with lines linetype -1 notitle

The datafile 'randpts' was made in GNU Octave using the commands

f = fopen('randpts', 'w');
for i=1:200; 
   x=rand(1); 
   y=0.2*randn(1) + 3*x + 0.35; 
   fprintf(f, '%g %g\n', x, y); 
end
fclose(f)

(identical code also works in Matlab.)

Licensing

This work has been released into the public domain by its author, I, Berland. This applies worldwide.
In some countries this may not be legally possible; if so:
I, Berland grants anyone the right to use this work for any purpose, without any conditions, unless such conditions are required by law.

File history

Click on a date/time to view the file as it appeared at that time.

	Date/Time	Dimensions	User	Comment
current	12:50, 28 October 2008	600 × 480 (41 KB)	F l a n k e r	Reverted to version as of 10:01, 28 October 2008
	10:16, 28 October 2008	600 × 480 (42 KB)	F l a n k e r	Using Helvetica as the font
	10:13, 28 October 2008	600 × 480 (42 KB)	F l a n k e r	Using Helvetica as the font
	10:01, 28 October 2008	600 × 480 (41 KB)	F l a n k e r	Tring to resolve
	09:30, 28 October 2008	600 × 480 (23 KB)	Wiso	{{Information \|Description= \|Source= \|Date= \|Author= \|Permission= \|other_versions= }}
	20:57, 25 June 2007	600 × 480 (20 KB)	Berland	{{Information \|Description=Illustration of linear regression on a data set. \|Source=self-made in Gnuplot. \|Date=24 June 2007 \|Author= Berland }} ==Gnuplot source code== set terminal svg fname "Helvetic
	18:56, 24 June 2007	600 × 480 (19 KB)	Berland	{{Information \|Description=Illustration of linear regression on a data set. \|Source=self-made in Gnuplot. \|Date=24 June 2007 \|Author= Berland }} ==Gnuplot source code== set terminal svg fname "Helvetic