search for: jeremybutler

Hi, I'm trying to split 96 columns into 8 groups and then obtain row totals for each of those groups. But: c.factor <- as.factor(c(rep(1:8,c(18,12,12,12,6,12,12,12))) data.groups <- split(data,c.factor) splits my rows into those groups. Is there anyway I can tell R to apply the split function to columns or am I doing something wrong when creating "c.factor" Cheers, Jeremy

Hi, How would I go about plotting all 8 columns of a data.frame on a simple line graph. i.e. eight lines and sets of points, differentiated by line pattern or colour)? An what further arguments would I need to invoke a log scale on the y-axis of that same plot (normal x-axis)? Cheers, Jeremy

...*********************************************** Jeremy Zachariah Butler BSc(hons) Department of Geography phone: 64 3 479 8788 University of Otago fax: 64 3 479 8706 Te Whare Wananga o Otago e-mail: butje612 at student.otago.ac.nz P.O. Box 56, Dunedin jerrytheshrub at hotmail.com New Zealand jeremybutler at paradise.net.nz ***************************************************************************

Hi After trying a simple decorana analysis (from the vegan package) on a simple data frame which contains no NA's the following error was returned: > tt_decorana(covN) Error in decorana(covN) : NA/NaN/Inf in foreign function call (arg 1) Have any vegan users come across this error and know what can be done about it? Cheers, J

Hi, Is there any facility in R to use text strings from a different object in a graphical output. For example, I have a simple bargraph but instead of using the row names as the x axis labels I would rather use the text strings from a different object (there are the same amount of text strings in that other object as rows in the matrix used to create the barplot). I have to do this kind of