[R] abline does not show on plot if slope differs from 0

Hi, Does anybody have a hint why this does not work? plot(c(1991,2000), c(-1,10))abline(a=6, b=-1, col="dark grey", lty="dashed") It does not generate an error message, but the line does not turn up. If b=0 it works fine. If I change the axes of the plot to plot(c(1,10), c(-1,10)) it does work

[R] number of Excel worksheets

Dear All, I would like to count or list the names of the existing worksheets within an .xls file. Any hints? Thaks, Gabor -- Pozsgai Gábor www.coleoptera.hu www.photogabor.com __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinf

Re: [R] number of Excel worksheets

eet, >     condition)) >     odbcClose(channel) >     if (length(grep("#", names(data))) > 0) >     cat("Caution: Column names may have had '.' changed to '#'.\n") >     cat("Caution: Be careful with mixed-type columns that begin wi

[R] BiodiversityR GUI error message

Dear List, I have just got a laptop with win 7 64 bit installed on it. I installed R and quite a few packages I use. When I try to start BiodiversityR the library loads without any problems but when starting the GUI it gives me the following error message: Sourced: BiodiversityGUI.R Error : .onAt