[R-SIG-Mac] simple line plots?
Don MacQueen
macq at llnl.gov
Fri Sep 2 20:59:45 CEST 2005
This is a general R question, not a Mac-specific question, so you'll
get more suggestions if you post on regular R help.
In the meantime,
> help.search('error bar')
Help files with alias or concept or title matching 'error bar' using
fuzzy matching:
errbar(Hmisc) Plot Error Bars
xYplot(Hmisc) xyplot and dotplot with Matrix Variables to
Plot Error Bars and Bands
ncv.test(car) Score Test for Non-Constant Error Variance
plotCI(gplots) Plot Error Bars and Confidence Intervals
brings up three possibilities, the functions errbar(), xYplot(), and plotCI().
Keep digging in the documentation. Although I can't tell you exactly
which one or ones to look in, there is undoubtedly something. If
nothing else, search the R-help archives.
-Don
At 5:19 PM +0100 9/2/05, Ashish Ranpura wrote:
>I've spent quite a lot of the day trying to construct a fairly
>standard line plot in R, and I have the feeling there is a simple way
>that I haven't discovered.
>
>I have a large vector of measurements (TIME), and each measurement
>falls into one of three categories (PHASE). For each PHASE value, I
>want a mean of the corresponding TIME measurements plotted as a point
>along with standard error bars. I'd like the three resulting point
>connected with line segments.
>
>I'd like to have two data series like this plotted on the same graph
>-- one in red, one in blue.
>
>Excel, as awful as it is, does this kind of graph quite easily.
>
>After sifting through the scattered documentation, the best I could
>do was to store the mean values of the three points, plot those three
>numbers against the values 1,2, and 3, then use the arrows() function
>to draw error bars on each one. This is a LOT of manual effort, as
>you can imagine (in addition to the means I have to calculate the
>standard errors for each point, and I still don't know how to draw
>each of the three line segments I need).
>
>Any suggestions?
>
>Thanks,
>
>--Ashish.
>
>
>-----
>Ashish Ranpura
>Institute of Cognitive Neuroscience
>University College London
>17 Queen Square
>LONDON WC1N 3AR
>
>_______________________________________________
>R-SIG-Mac mailing list
>R-SIG-Mac at stat.math.ethz.ch
>https://stat.ethz.ch/mailman/listinfo/r-sig-mac
--
--------------------------------------
Don MacQueen
Environmental Protection Department
Lawrence Livermore National Laboratory
Livermore, CA, USA
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