simple line plots?
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
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-------------------------------------- Don MacQueen Environmental Protection Department Lawrence Livermore National Laboratory Livermore, CA, USA