[R] Simple plotting errors

[baptiste auguie]

I'd suggest you first combine the 12 data.frames into one, using  
melt() from the reshape package.

makeDummy <- function(.){ # since you don't provide a reproducible  
example
	
	data.frame(x=letters[1:10], y=rnorm(10))
}


listOf12DataFrames <- lapply(1:12, makeDummy)

library(reshape)
dm <- melt(listOf12DataFrames, id="x")
str(dm) # each original data.frame is identified by the integer L1

with(subset(dm, x=="a"),
plot(L1, value, t="l"))


baptiste


On 18 May 2009, at 13:17, Steve Murray wrote:

>
> Dear R Users,
>
> I have 12 data frames, each of 12 rows and 2 columns.
>
> e.g. FeketeJAN
>                   MEAN    SUM_
> AMAZON      144.4997874 68348.4
> NILE          5.4701955  1394.9
> CONGO        71.3670036 21196.0
> MISSISSIPPI  18.9273250  6511.0
> AMUR          1.8426874   466.2
> PARANA       58.3835497 13486.6
> YENISEI       1.4668313   592.6
> OB            1.4239179   559.6
> LENA          0.9342164   387.7
> NIGER         4.7245709   826.8
> ZAMBEZI      76.6893794  8665.9
> YANGTZE      10.6759257  1729.5
>
>
> I want to do a line plot of the value of Amazon 'Sum' (in this case,  
> 68348.4) for each of the 12 data frames. I've tried doing this as  
> follows:
>
> plot(FeketeJAN[1,2], FeketeFEB[1,2], FeketeMAR[1,2], *through to  
> December* type="l")
>
> but receive: Error in strsplit(log, NULL) : non-character argument
>
>
> I've also tried:
>
> plot(FeketeJAN$AMAZON[,2], FeketeFEB$AMAZON[,2], *through to  
> December* type="l")
>
> but receive:
>
> Error in plot.window(...) : need finite 'xlim' values
> In addition: Warning messages:
> 1: In min(x) : no non-missing arguments to min; returning Inf
> 2: In max(x) : no non-missing arguments to max; returning -Inf
> 3: In min(x) : no non-missing arguments to min; returning Inf
> 4: In max(x) : no non-missing arguments to max; returning -Inf
>
>
> What is it that I'm doing wrong?!
>
> Many thanks for any advice,
>
> Steve
>
>
>
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_____________________________

Baptiste Auguié

School of Physics
University of Exeter
Stocker Road,
Exeter, Devon,
EX4 4QL, UK

Phone: +44 1392 264187

http://newton.ex.ac.uk/research/emag