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I've got a matrix with 2 columns and n rows. I need to sort it first by the values in column 1 ascending. Then for values which are the same in column 1, sort by column 2 decending. For example: 2 .5 1 .3 1 .5 3 .2 Goes to: 1 .5 1 .3 2 .5 3 .2 This is easy to do in spreadsheet programs but I can't seem to work out how to do it in R and haven't been able to find a solution anywhere.

Hey all, I'm currently trying to build an R package and don't really know what to make of the error message I'm getting. I couldn't find anything helpful online so hopefully somebody here can give me a couple of pointers. I see the following when I try to build: s$ R CMD build --verbose r_package_files/ Warning: unknown option '--verbose' * checking for file

...really do for us is puff us up and make us feel like gods.  We are mammals, and have not exhausted the annoying little problems of being mammals.                                 -K. Mullis ------------------------------ Message: 31 Date: Wed, 27 May 2009 13:39:23 +0100 From: Paul Geeleher <paulgeeleher@gmail.com> Subject: [R] Sort matrix by column 1 ascending then by column 2     decending To: r-help@r-project.org Message-ID:     <2402860e0905270539i1dded0b6la619c6d0d31fc2ac@mail.gmail.com> Content-Type: text/plain; charset=ISO-8859-1 I've got a matrix with 2 columns and n rows. I...

Hi guys, I'm trying to install Rmpi on the slave nodes of my cluster. The installation seems to work with no errors or warnings using this command: R CMD INSTALL --configure-args="--with-Rmpi-include=/usr/lib64/openmpi/1.3.2-gcc/include --with-Rmpi-libpath=/usr/lib64/openmpi/1.3.2-gcc/lib --with-Rmpi-type=OPENMPI" Rmpi_0.5-8.tar.gz But when I attempt to load Rmpi I get the

Hi, I'm running Ubuntu Jaunty, downloading R and Rpy from this repository: deb http://cran.uk.r-project.org/bin/linux/ubuntu jaunty/ When was automatically upgraded, Rpy (which should be downloaded from the same repository) seems to have stopped working. I've tried re-installing the python-rpy package manually. I get the following error when I try to import rpy: >>> import

Hi, I've a matrix that contains 4 replicates of each rowname. (4 a's, 4 b's, 4 c's in no particular order) Like this: # c 32 a 1 b 4 c 87 c 34 b 54 a 23 a 12 b 9 a 3 b 87 c 43 There are a couple of more columns but I'm using the above as an example I need to sort it so that the same rownames appear together in alpahbetical order. Like this: # a 1 a 23 a 12 a 3 b 4

Hi all, I'm trying to compile R 2.11.0 on a redhat machine, but I'm getting the following error when I run ./configure: checking whether gfortran appends underscores to external names... yes checking whether gfortran appends extra underscores to external names... no checking whether mixed C/Fortran code can be run... configure: WARNING: cannot run mixed C/Fortran code configure: error: