search for: tempres

I have a data frame with both positive and negative values, and I want to make all the negative values equal zero, so i can eventually take an average. I've tried temp2 <- ifelse(tempr<0, 0, tempr) but it doesn't seem to work. Any suggestions? Thanks!

Hi again, I have played a little more with mdbtools and R. I downloaded the latest version of mdbtools from sourceforge (version 0.6pre1). Quickly scanning the mailing list suggests that ODBC seems to work with PHP but I have not been able to get it to work with R. I can make a connection to the database and when I do a query I get back the names of the rows but not the data. I must admit I have

Hi, I have a long matrix of the following form which I would like to subset according to the third column: [x y z]: a1 c1 1 a1 c1 2 a2 c1 1 a1 c2 1 a1 c2 2 . . . The first two columns a characters ai and cj. I would like to keep all the rows where there are two entries for z, 1 and 2. That is, I want: a1 c1 1 a1 c1 2 a1 c2 1 a1 c2 2 . . . I try to use something like

Up to now I have got the base R and about half of the packages working on SuSe Linux 5.3 using gcc, g77 and xdevel. The other half, for example: pspline, logspline, KernSmooth, akima, tripack, ppr, principal.curve, cluster, funfit, repeated, event, etc., just won't install. Some of them give warnings at expressions in subroutines (repeated, event, pspline,etc.. I will ask about this in

Up to now I have got the base R and about half of the packages working on SuSe Linux 5.3 using gcc, g77 and xdevel. The other half, for example: pspline, logspline, KernSmooth, akima, tripack, ppr, principal.curve, cluster, funfit, repeated, event, etc., just won't install. Some of them give warnings at expressions in subroutines (repeated, event, pspline,etc.. I will ask about this in