something like this will get you going, assuming your data are in a dataframe
called “qual”
# qual <- read.table(pipe("pbpaste"), header=T, sep='\t')
boxplot(formula=Time~Distance+Season, data=qual)
Followup question from me:
i can’t see why
boxplot(formula=Time, data=qual)
should return the error "can’t find Time” “Time~" and “~Time" don’t help
Doesn’t that make the formula interface to boxplot broken for one-variable non
grouped plots?
Best, t
On 17 May 2011, at 12:31 PM, Vikas Garud wrote:
> Hi,
>
> I am a consultant in Quality Management. I am exploring the use of R
> with any GUI - R commander/Rkward for doing analytical work. Have
> installed R, R Commander and Rkward.
>
> I hope to learn by doing various exercises that I use for teaching
> analytical techniques to my clients. I would be posting the data on
> this mailing list, and the rkward mailing list wherever I get stuck.
>
> First such technique I am trying to explore is the use of boxplots.
> The data is pasted below:
> Season Transporter Distance Tonnage Time
> 1 1 500 1 17
> 1 1 500 2 22
> 1 1 1000 1 23
> 1 1 1000 2 29
> 1 1 1500 1 33
> 1 1 1500 2 38
> 1 2 500 1 19
> 1 2 500 2 26
> 1 2 1000 1 30
> 1 2 1000 2 35
> 1 2 1500 1 42
> 1 2 1500 2 42
> 2 1 500 1 18
> 2 1 500 2 24
> 2 1 1000 1 25
> 2 1 1000 2 26
> 2 1 1500 1 35
> 2 1 1500 2 38
> 2 2 500 1 21
> 2 2 500 2 24
> 2 2 1000 1 28
> 2 2 1000 2 37
> 2 2 1500 1 36
> 2 2 1500 2 44
>
> In this exercise, I am trying to plot box plots of the variable
> "Time", the last column and separated by all the other variables-
> Season, Transporter, Distance and Tonnage. I expect the output in
> form of multiple box plots, arranged side by side so that I can
> compare the time performance for, say, season 1, transporter 2,
> Distance 500 and tonnage 2 with, say, season 2, transporter 1,
> Distance 500 and tonnage 2. The box plot command in R Commander
> (Grpahs->Boxplot...) has a button called "plot by groups" presumably
> to achieve what I am trying to do. However, on clicking I don't get
> any further output. What am I missing? (There is nothing equivalent
> to this button under Rkward)
>
> I tried to search the mailing list on box plot, but could not find
> anything relevant. I have also searched in manual and seen this type
> (or even more complex analysis) being done on terminal. However, I
> need to do it under (any) GUI. Any help is highly appreciated.
>
> Thanks
> Vikas Garud
>
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> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
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