On Wed, 2008-10-08 at 12:01 -0500, Michael Just wrote: > Thank you all for you suggestions. They are all helpful. However, I have > come to a more fundamental problem. Preparing my data to even make such a > graph. I thought I was ready. I will obviously need to find the n, mean, > and confidence interval for my data before I can plot them. for some of > these plots. > > I thought perhaps this data manipulation would be easily done in R, but > perhaps I should do it elsewhere and then bring it into R. I have about 5000 > rows & about 30 columns in my csv. I need to find: mean, n, confidence > interval for a to-be-made selection from the entire data set. > > I have tried: aggregate, subset, dat$col1=2, etc > > Clearer?: I want to select data from my dataset where column1=2. Then when > plotting this data I want to group it by 2 values (out of 4) from column10.
Actually, the functions in sciplot will do this for you. All you need is to specify a response column, the column indicating the x-axis, the dataframe, and the subset of interest. E.g.: bargraph.CI(response=whatever.column.has.the.response, x.factor=col10, data=data, subset=col2==2) The default is to plot the mean +/- 1SE but this can be changed as needed. HTH, Manuel > I know this is probably as clear as mud, thanks for you continuing patience. > I would really appreciate any assistance you are able to provide me. My > limited knowledge in R grows quite rapdily and things become so much more > successful for me when I am granted tips and snippets of code form R users > like you. > > Sincerely, > Michael Just > > On Wed, Oct 8, 2008 at 11:25 AM, hadley wickham <[EMAIL PROTECTED]> wrote: > > > On Tue, Oct 7, 2008 at 11:31 PM, Michael Just <[EMAIL PROTECTED]> wrote: > > > Hello, > > > I'd appreciate a suggestion on how to construct plots (barplots?) that > > use > > > means on the Y axis instead of density/count. I'd also like to use groups > > > and plot error or confidence interval bars on these graphs. I know this > > is a > > > read the manual situation. I'd appreciate help with what to read, or your > > > benevolence with some sample code. > > > > Here's an alternative suggestion - don't use bars, use dots. Bar > > plots with standard errors are sometime called dynamite plots > > (probably because they should be blown up). See > > http://biostat.mc.vanderbilt.edu/twiki/bin/view/Main/DynamitePlots and > > http://emdbolker.wikidot.com/blog:dynamite for some reasons not to use > > them and possible alternatives. > > > > I hope that package authors who provide methods to make these plots > > easy will reconsider. > > > > Hadley > > > > -- > > http://had.co.nz/ > > > > [[alternative HTML version deleted]] > > ______________________________________________ > R-help@r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide http://www.R-project.org/posting-guide.html > and provide commented, minimal, self-contained, reproducible code. -- http://mutualism.williams.edu
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______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
