[R] barplot help needed

[Antje]

Thank you very much for your help.
I just don't understand the following line (which also gives me a 
dimension error later in the arrows command)

etype <- rep(c(sd1, sd2, sd3, sd4), length(data1))

Antje

(I don't see my emails to the mailinglist anymore... just the answers 
from other people... I don't understand???)


Jacques VESLOT schrieb:
> tab <- do.call(rbind, list(data1, data2, data3, data4))
> etype <- rep(c(sd1, sd2, sd3, sd4), length(data1))
> b <- barplot(tab, beside=T)
> arrows(unlist(b), unlist(tab) - etype, unlist(b),  unlist(tab) + etype, 
> code=3)
> -------------------------------------------------------------------
> Jacques VESLOT
> 
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> 
> Antje a écrit :
>> hello,
>>
>> I would like to create the following barplot:
>>
>> I have 4 different data sets (same length + stddev for each data point)
>>
>> data1
>> sd1
>> data2
>> sd2
>> data3
>> sd3
>> data4
>> sd4
>>
>> now, I'd like to plot in the following way:
>>
>> data1[1],data2[1],data3[1],data4[1] with it's sd-values side-by-side 
>> at one x-axis label (named "position 1") and each bar in different 
>> colors.
>>
>> data1[2],data2[2],data3[2],data4[2] at the next x-axis label (named 
>> "position 2") with the same color scheme
>>
>> and so on over the whole length.
>>
>> I managed to plot one set in the following way:
>>
>> par(mai=c(1.5,1,1,0.6))
>> plotInfo <- barplot(data1, las=2, ylim = c(0,plotMax+1), ylab = 
>> "Percentage")
>> arrows(plotInfo,data1,plotInfo,  data1 + sd1, length=0.1, angle=90)
>> arrows(plotInfo,data1,plotInfo,  data1 - sd1, length=0.1, angle=90)
>>
>> could anybody give me a help on this?
>>
>> Antje
>>
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>>
>