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Grum, Mikkel

2002-Jan-08 14:00 UTC

[R] colour coding and different point types in a plot

I'm trying to plot four different sorghum types on a plot using a different
colour/symbol combination for each sorghum type (TYPBOTA in the script
below).  What am I doing wrong?:

plot(xx$LATITUDE,xx$SFD1,
   points(xx$SFD1,xx$LATITUDE,
   col=1:4[codes(xx$TYPBOTA)],pch=c(4,3,1,2)[codes(xx$TYPBOTA)])
grid()

I get the following error message
Error in 1:4[codes(xx$TYPBOTA)] : NA/NaN argument
In addition: Warning message: 
Numerical expression has 162 elements: only the first used in:
1:4[codes(xx78$TYPBOTA)] 


Best wishes,
Mikkel


Mikkel Grum, PhD
Genetic Diversity Scientist
International Plant Genetic Resources Institute (IPGRI)
Sub-Saharan Africa Group
***
c/o ICRAF
PO Box 30677 Nairobi, Kenya
Tel: 254 2 524505 / 524500
Fax: 254 2 524501 / 524001
IVDN Tel: 645 4505 / 4500
IVDN Fax: 645 4501 / 4001
m.grum at cgiar.org
ipgri-kenya at cgiar.org
www.ipgri.cgiar.org

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Peter Dalgaard BSA

2002-Jan-08 15:03 UTC

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[R] colour coding and different point types in a plot

"Grum, Mikkel" <M.GRUM at CGIAR.ORG> writes:
> I'm trying to plot four different sorghum types on a plot using a
different
> colour/symbol combination for each sorghum type (TYPBOTA in the script
> below).  What am I doing wrong?:
> 
> plot(xx$LATITUDE,xx$SFD1,
>    points(xx$SFD1,xx$LATITUDE,
>    col=1:4[codes(xx$TYPBOTA)],pch=c(4,3,1,2)[codes(xx$TYPBOTA)])
> grid()
> 
> I get the following error message
> Error in 1:4[codes(xx$TYPBOTA)] : NA/NaN argument
> In addition: Warning message: 
> Numerical expression has 162 elements: only the first used in:
> 1:4[codes(xx78$TYPBOTA)] 
I think you need (1:4)[...] (and maybe also reconsider the use of
codes(). It has certain surprises, and indexing with a factor is the
same as using foo[as.integer(f)]) 

-- 
   O__  ---- Peter Dalgaard             Blegdamsvej 3  
  c/ /'_ --- Dept. of Biostatistics     2200 Cph. N   
 (*) \(*) -- University of Copenhagen   Denmark      Ph: (+45) 35327918
~~~~~~~~~~ - (p.dalgaard at biostat.ku.dk)             FAX: (+45) 35327907
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Martin Maechler

2002-Jan-08 15:07 UTC

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[R] colour coding and different point types in a plot

>>>>> "MGrum" == Grum, Mikkel <M.GRUM at
CGIAR.ORG> writes:
    MGrum> I'm trying to plot four different sorghum types on a
    MGrum> plot using a different colour/symbol combination for
    MGrum> each sorghum type (TYPBOTA in the script below).
    MGrum> What am I doing wrong?:

-- you mean, apart from using hard/horrible to read all-uppercase
    variable names  :-))  aka `big grin' -


    MGrum> plot(xx$LATITUDE,xx$SFD1,

I assume this command goes on and is finished in your real example ..

    MGrum> points(xx$SFD1,xx$LATITUDE,
    MGrum>       
col=1:4[codes(xx$TYPBOTA)],pch=c(4,3,1,2)[codes(xx$TYPBOTA)])

    MGrum> I get the following error message
    MGrum> Error in 1:4[codes(xx$TYPBOTA)] : NA/NaN argument
    MGrum> In addition: Warning message: 
    MGrum> Numerical expression has 162 elements: only the first used in:
    MGrum> 1:4[codes(xx78$TYPBOTA)] 

Maybe look at this ?

 > 1:4[c(3,1,2,NA,4,2)]
 Error in 1:4[c(3, 1, 2, NA, 4, 2)] : NA/NaN argument
 In addition: Warning message: 
 Numerical expression has 6 elements: only the first used in: 1:4[c(3, 1, 2, NA,
4, 2)]

 > (1:4)[c(3,1,2,NA,4,2)]
 [1]  3  1  2 NA  4  2


Morale of the story: always use "(..)" when in doubt

Regards,

Martin Maechler <maechler at stat.math.ethz.ch>
http://stat.ethz.ch/~maechler/
Seminar fuer Statistik, ETH-Zentrum  LEO C16	Leonhardstr. 27
ETH (Federal Inst. Technology)	8092 Zurich	SWITZERLAND
phone: x-41-1-632-3408		fax: ...-1228			<><
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Grum, Mikkel

2002-Jan-09 07:00 UTC

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[R] colour coding and different point types in a plot

Thanks to all, the brackets worked.  The variable names are the costs of
collaboration :), certainly not my preference.

mikkel

 -----Original Message-----
From: 	Martin Maechler [mailto:maechler at stat.math.ethz.ch] 
Sent:	08 January 2002 18:08
To:	Grum, Mikkel
Cc:	R-help at stat.math.ethz.ch
Subject:	Re: [R] colour coding and different point types in a plot
>>>>> "MGrum" == Grum, Mikkel <M.GRUM at
CGIAR.ORG> writes:
    MGrum> I'm trying to plot four different sorghum types on a
    MGrum> plot using a different colour/symbol combination for
    MGrum> each sorghum type (TYPBOTA in the script below).
    MGrum> What am I doing wrong?:

-- you mean, apart from using hard/horrible to read all-uppercase
    variable names  :-))  aka `big grin' -


    MGrum> plot(xx$LATITUDE,xx$SFD1,

I assume this command goes on and is finished in your real example ..

    MGrum> points(xx$SFD1,xx$LATITUDE,
    MGrum>
col=1:4[codes(xx$TYPBOTA)],pch=c(4,3,1,2)[codes(xx$TYPBOTA)])

    MGrum> I get the following error message
    MGrum> Error in 1:4[codes(xx$TYPBOTA)] : NA/NaN argument
    MGrum> In addition: Warning message: 
    MGrum> Numerical expression has 162 elements: only the first used in:
    MGrum> 1:4[codes(xx78$TYPBOTA)] 

Maybe look at this ?

 > 1:4[c(3,1,2,NA,4,2)]
 Error in 1:4[c(3, 1, 2, NA, 4, 2)] : NA/NaN argument
 In addition: Warning message: 
 Numerical expression has 6 elements: only the first used in: 1:4[c(3, 1, 2,
NA, 4, 2)] 

 > (1:4)[c(3,1,2,NA,4,2)]
 [1]  3  1  2 NA  4  2


Morale of the story: always use "(..)" when in doubt

Regards,

Martin Maechler <maechler at stat.math.ethz.ch>
http://stat.ethz.ch/~maechler/
Seminar fuer Statistik, ETH-Zentrum  LEO C16	Leonhardstr. 27
ETH (Federal Inst. Technology)	8092 Zurich	SWITZERLAND
phone: x-41-1-632-3408		fax: ...-1228			<><
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r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html
Send "info", "help", or "[un]subscribe"
(in the "body", not the subject !)  To: r-help-request at
stat.math.ethz.ch
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