Re: [R] Plotting a Trivial Matrix

2010-02-26 Thread Tobias.Mathow
What about 

http://www.phaget4.org/R/image_matrix.html

try function "f.matrix.plot"



Tobias Mathow
Forest Research Institute Baden-Wuerttemberg (FVA) 
Wonnhaldestr. 4, D- 79100 Freiburg 
Phone: ++49-761-4018-365
www.fva-bw.de


-Ursprüngliche Nachricht-
Von: r-help-boun...@r-project.org [mailto:r-help-boun...@r-project.org] Im 
Auftrag von Lorenzo Isella
Gesendet: Freitag, 26. Februar 2010 09:30
An: r-help
Betreff: [R] Plotting a Trivial Matrix

Dear All,
Consider a matrix (N x N) where each entry is either zero or one (can
hardly get any simpler).
Now, I would like to plot it as a 'chessboard' where every matrix entry
is a black (1) or white (0) square.
Whatever tool I use to plot it, it should not try to interpolate the
data at all.
I found some online references
http://www.phaget4.org/R/image_matrix.html
but probably I can resort to something much simpler.
Can anyone provide me with a simple example I can modify later on?
Many thanks

Lorenzo

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[R] axis label using expression()

2009-09-28 Thread Tobias.Mathow
Probably a very simple problem:

 

I want to annotate a plot axis with a name of my data using
expression().

The name for the data is $\hat P4_k$ written in LaTex style -> hat
symbol above P, followed by a 4 and a subscripted k index

 

I tried to write this using

 

 

x<-c(1,2,3,4)

y<-c(3,5,7,9)

 

plot(x,y,xlab=expression(hat(P4[k])) )

 

 

but cant find a way to force the hat symbol to be located only above the
P symbol and not above the 4 symbol.

 

I have spent some time looking up ?expression, ?plotmath as well as some
other R docu but cannot find a way.

Any help is greatly appreciated.

Regards, toby

 

 


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