If your data came in using read.csv then it is most likely a data frame rather than a matrix. Try as.matrix to convert it to a matrix and then use barplot.
If that does not work then give us a sample of your data and the exact commands (copy/paste) that use used along with any errors/warnings. -- Gregory (Greg) L. Snow Ph.D. Statistical Data Center Intermountain Healthcare greg.s...@imail.org 801.408.8111 > -----Original Message----- > From: r-help-boun...@r-project.org [mailto:r-help-boun...@r- > project.org] On Behalf Of Phillip Porter > Sent: Wednesday, June 09, 2010 2:52 PM > To: r-help@r-project.org > Subject: [R] barplot of a table > > Good morning, > I've been dabbling in R, so my knowledge has quite a few holes in it. > I'm > hoping that this has a simple answer and just falls into one of those > holes. > > I have a table of percentages that I want to display as a barchart. > Groups > 1-4 in columns and Variables 1-5 in rows, with the percentage of each > group > expressing interest in each variable in the cells. In Excel I just > highlight the data and make a chart and it pops out with four bars > (representing the cell values for each group) for each of the five > variables. > > What I think I need to do is barplot([mydata], beside=TRUE, [labels, > colors, > and text]), but I get the error "'height' must be a vector or a matrix" > when > I do this. When I try this using one of the preloaded datasets > (VADeaths) I > can get the graph I'm looking for, but not when I read.csv my dataset. > > Does anyone know what I'm doing wrong? Can anyone point me in the > right > direction? > > Thanks, > Phillip > > [[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. ______________________________________________ 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.
