[R] carpet plots

[David Winsemius]

On Jul 2, 2012, at 5:31 PM, David Winsemius wrote:

>
> 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

Also for base graphics fans:

?filled.contour         # ......  and its first example
filled.contour(volcano, color = terrain.colors, asp = 1)# simple

>
> -- 
> David.
>>
>> // joseph w. clark , phd candidate
>> \\ usc marshall school of business
>>
>>
>> ----------------------------------------
>>> Date: Mon, 2 Jul 2012 20:05:12 +0200
>>> From: mueller.eisborn at googlemail.com
>>> To: r-help at 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
>
> ______________________________________________
> R-help at r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.

David Winsemius, MD
West Hartford, CT