[R] plotting multiple groups (newbie Q)

[Petr Pikal]

Hi

I suspect that value in kSum$group is not exactly "Y" (some space 
like "Y ") or maybe there is some other variable named group 
elsewhere but without value "Y".

try to look at kSum$group
or do ls().

HTH
Petr

On 30 Oct 2006 at 20:13, Sumitrajit Dhar wrote:

To:             	r-help at stat.math.ethz.ch
From:           	Sumitrajit Dhar <s-dhar at northwestern.edu>
Date sent:      	Mon, 30 Oct 2006 20:13:14 -0600
Subject:        	[R] plotting multiple groups (newbie Q)

> Hi Folks,
> 
> After loading a data set, I run the following:
> 
>  > kSum <- orderBy(~group,(summaryBy(DP_Level~F2 
> +group,data=kdata,FUN=c(mean,sd),na.rm=T)))
> 
> 
> kSum looks like this:
> 
>  > kSum
>       F2 group DP_Level.mean DP_Level.sd
> 1   1.0     N   -1.55186475   11.022245
> 4   2.0     N   -2.48013300   10.624583
> 7   3.0     N  -12.47671250   11.104792
> 10  4.0     N  -13.72430950   12.000779
> 13  6.0     N  -20.33209750   11.393002
> 16  8.0     N  -26.09158500    6.851262
> 19 12.5     N  -25.17146000    5.480260
> 22 14.0     N  -26.11350500    6.012569
> 25 16.0     N  -25.77838600    6.186600
> 2   1.0    SN   -4.89147932   14.141263
> 5   2.0    SN  -13.11899886   11.457917
> 8   3.0    SN  -20.30688429    8.037245
> 11  4.0    SN  -27.95203107    7.337336
> 14  6.0    SN  -23.29571750    9.499774
> 17  8.0    SN  -25.60317143    7.292301
> 20 12.5    SN  -29.48492857    8.008832
> 23 14.0    SN  -25.12681071    5.811917
> 26 16.0    SN  -26.62930714    5.108508
> 3   1.0     Y    0.08977071    9.510582
> 6   2.0     Y   -2.13214786   13.840692
> 9   3.0     Y   -7.44449971   10.245682
> 12  4.0     Y   -6.42145271   17.000314
> 15  6.0     Y   -2.10020521   16.730351
> 18  8.0     Y   -7.88271257   19.726457
> 21 12.5     Y  -24.26840000    7.275585
> 24 14.0     Y  -22.18628571    2.878094
> 27 16.0     Y  -24.74949286    6.556951
> 
> Now I want to do some plotting:
> 
>  > plot(kSum$F2[group=="N"],kSum$DP_Level.mean[group=="N"],type="l") #
> This works fine
>  > plot(kSum$F2[group=="SN"],kSum$DP_Level.mean[group=="SN"],type="l")
> # This plots both "N" and "SN" in one line sequentially
>  > plot(kSum$F2[group=="Y"],kSum$DP_Level.mean[group=="Y"],type="l") #
> This gives the following error messages. Error in plot.window(xlim,
> ylim, log, asp, ...) :
>  need finite 'xlim' values
> In addition: Warning messages:
> 1: no non-missing arguments to min; returning Inf
> 2: no non-missing arguments to max; returning -Inf
> 3: no non-missing arguments to min; returning Inf
> 4: no non-missing arguments to max; returning -Inf
> 
> What am I doing wrong? All suggestions are appreciated.
> 
> Regards,
> Sumit
> 
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Petr Pikal
petr.pikal at precheza.cz