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--- John Kane <jrkrideau at yahoo.ca> wrote: > Date: Thu, 19 Apr 2007 15:50:36 -0400 (EDT) > From: John Kane <jrkrideau at yahoo.ca> > Subject: RE: [R] Character coerced to factor and I > cannot get it back > To: Jorge Cornejo-Donoso <jorgecornejo at uach.cl> > > > --- Jorge Cornejo-Donoso <jorgecornejo at uach.cl> > wrote: > > > Maybe you could made something like: > > Id <- floor(number/10000) > > > > On this way you would get out the last 4 numbers > of > > the "number&...

...e1.df[,-3],mean) sex zone fema male 1 18.5 15 2 19.0 18 > Hope this helps! Sincerely, Erin Hodgess Associate Professor Department of Computer and Mathematical Sciences University of Houston - Downtown mailto: hodgess at gator.uhd.edu From: "Jorge Cornejo-Donoso" <jorgecornejo at uach.cl> To: "'Erin Hodgess'" <hodgess at gator.dt.uh.edu> Subject: RE: [R] RV: by sentence OK.. Thank for the advice. By and tapply works with 1 categorical variable, but what can be used for 2 categorical variables. Example: Zone Sex Length 1 male 15 1 f...

Hi i have to table with IDs in each one. I want to make a join (as in sql) by the ID. Is any way to use the RODBC package (or other) in local tables (not a access, mysql, sql, etc. ) and made the join? Thanks in advance

Dear All, The institute I work for is organizing an internal workshop for High Performance Computing (HPC). I am planning to attend it and talk a bit about fluid dynamics, but there is also quite a lot of interest devoted to data post-processing and management of huge data sets. A lot of people are interested in image processing/pattern recognition and statistic applied to geography/ecology, but I

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