similar to: print.data.frame : row.name = FALSE not having intended effect

Hi, I'd like to rank obs in a data frame as subset by 2 or more columns... The example input would look like the following: ====+====+====+====+ x y v -- -- -- a w 200 a w 100 b w 500 b w 200 b z 300 b z 400 ====+====+====+====+ And the data frame I want to create is below: ====+====+====+====+ x y v rank -- -- -- ---- a w 200 1 a w 100 2

Hi, I'm trying to get the Hmisc module on my Ubuntu Hardy Heron install. I tried getting Hmisc from within R by issuing the standard 'install.packages' command, but it said I needed 'gfortran' to compile. I thought I could circumvent this by using 'aptitude' to get the package 'r-cran-hmisc', but when I got it, the package had critical missing parts (got

Hi, Search through the R archives, and couldn't find my answer... how do you format numbers with commas (standard American, one every three digits)? Thanks, Matt -- It is from the wellspring of our despair and the places that we are broken that we come to repair the world. -- Murray Waas

Hi, I have a dataframe like the following: xfact yfact zfact response ------- ------- ------- -------------- x1 y1 z1 r1 x1 y1 z2 r2 ... I want output that looks like: ___ zfac levels___ xfact yfact z1 z2 ... zn ------- ------- ---- ---- ... ---- x1 y1 r1 r2 rn .... How can I go about

Hi, I want to sort a data frame by multiple columns and then take the first record in each unique level of the "by" group I used to sort the data frame. Does someone have an example of how to do this? Thanks, Matt -- It is from the wellspring of our despair and the places that we are broken that we come to repair the world. -- Murray Waas

Hi, Coming to R from SAS... I have a data.frame A with 2 long factors "x" and "y". I want to get a count of the number of rows with each level of "x" and "y" jointly. 'table' seemed like it would work, but as I have many levels, the matrix output is pretty useless to me (and I don't care about zero values). How can I get output that looks

Warranty on Accuracy, Precision, Legality, ... of R in Research (These questions may well have been raised.) What is the implied warranty of using R for research & publications, consulting, etc.? Alternately, how does one obtain such a warranty? Your answers will be much appreciated. Perhaps you can point me to some websites which discussed this subject in the past. Thanks & regards