On Jul 2, 2012, at 4:21 PM, Joseph Clark wrote:
These "carpet plots" are also called "heat maps" and there's a
current thread with the subject line "Heat Maps" in which I've given
a couple of examples of code for them. The R function image() is
very easy to use:
image( x=(x values), y=(y values), z=(matrix of z values with x rows
and y columns), col=(vector of colors), breaks=(vector of break
points, one more than colors) )
What I'd like to know is: does anyone know how to easily create a
legend/key to the color gradients, like the one in the right margin
of Mueller's first example: (http://www.johannes-hopf.de/wordpress/wp-content/uploads/2009/12/Zufall-300x225.png)?
require(lattice)
?levelplot
--
David.
// joseph w. clark , phd candidate
\\ usc marshall school of business
----------------------------------------
Date: Mon, 2 Jul 2012 20:05:12 +0200
From: mueller.eisb...@googlemail.com
To: r-help@r-project.org
Subject: [R] carpet plots
Hi all,
I wonder why there is so little software for carpet plots (german:
Rasterdiagramm) (Three dimensional plot (x, y, z), the 3rd dimension
(z) symbolized by colourgradients). Besides from one or the other non
free software I only found an OpenOffice macro, a combination of
Gnuplot and Excel (an Excel macro calling gnuplot)
(http://www.johannes-hopf.de/2009/12/carpet-plot-version-1-3/9 and
Quikgrid (http://www.galiander.ca/quikgrid/) which I use for
bathymetric maps.
Though I use one or two R scripts I have no deeper knowledge. Because
I think "That's a thing R can do!", I suppose, there are scripts for
this purpose. Perhaps one of you knows such a script. I would be very
grateful if you could point me to some information on this subject.
Richard
--
Richard Müller . Am Spring 9 . D-58802 Balve
www.oeko-sorpe.de
David Winsemius, MD
West Hartford, CT
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