here is one way: > mydata <- data.frame(observ=sample(1:10,20,TRUE), value=sample(1:6,20,TRUE)) > > mydata observ value 1 3 6 2 4 2 3 6 4 4 10 1 5 3 2 6 9 3 7 10 1 8 7 3 9 7 6 10 1 3 11 3 3 12 2 4 13 7 3 14 4 2 15 8 5 16 5 5 17 8 5 18 10 1 19 4 5 20 8 3
> hist(rep(mydata$value, mydata$observ)) On Fri, Apr 17, 2009 at 10:59 AM, Paul Warren Simonin <paul.simo...@uvm.edu> wrote: > Hello! > Thanks for reading this request for assistance. I have a question regarding > creating a histogram-like figure from data that are not currently in the > correct format for the "hist" command. > Specifically, my data have been processed and are in a matrix with columns > containing the variables of interest and separate columns containing the > number of times this variable was observed (counts). This data frame/matrix > is rather large (1600 rows), and there are multiple rows corresponding to > the same variable level (e.g., "temperature=8, 5 observations" in one row, > then the next: "temperature=8, 9 observations", and so on). In other words, > the data are not one long vector R can read and plot as a histogram, nor are > they condensed. My goal is to create a figure in which one axis is bins > (e.g., temperature values) and the other is number of observations in this > bin (e.g., number of organisms seen). > My question is: Is there a way R can be told to read my data to create a > plot like that I desire? So far I have tried several options, including bar > plots with no success. > > If there is no way to do this with my data as the are currently arrange, is > there an efficient way to re-arrange them? > > Thanks a lot for any assistance or advice! > > Sincerely, > Paul Simonin > > > -- > Paul W. Simonin > Graduate Research Assistant, MS Program > Vermont Cooperative Fish and Wildlife Research Unit > The Rubenstein School of Environment and Natural Resources > University of Vermont > 81 Carrigan Dr. > Burlington, VT 05405 > Ph:802-656-3153 > > ______________________________________________ > 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. > -- Jim Holtman Cincinnati, OH +1 513 646 9390 What is the problem that you are trying to solve? ______________________________________________ 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.
