Dear Fransico, The distance matrix would be 102000 x 102000. So it would contain 10404000000 values. If you need one bit for each value, this would requier 9,7 GB. So the distance matrix won't fit in the RAM of your computer.
Cheers, Thierry ---------------------------------------------------------------------------- ir. Thierry Onkelinx Instituut voor natuur- en bosonderzoek / Reseach Institute for Nature and Forest Cel biometrie, methodologie en kwaliteitszorg / Section biometrics, methodology and quality assurance Gaverstraat 4 9500 Geraardsbergen Belgium tel. + 32 54/436 185 [EMAIL PROTECTED] www.inbo.be Do not put your faith in what statistics say until you have carefully considered what they do not say. ~William W. Watt A statistical analysis, properly conducted, is a delicate dissection of uncertainties, a surgery of suppositions. ~M.J.Moroney > -----Oorspronkelijk bericht----- > Van: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] Namens Francisco Pastor > Verzonden: woensdag 25 april 2007 12:34 > Aan: [email protected] > Onderwerp: [R] Help with saptial analysis (cluster) > > Hi R-users > > I'm a beginner with R and statistics, so I need some help to > start my data analysis. I've been reading some docs and > tutorials on R and cluster analysis. > I've got a large dataset (102000 points) with values of > longitude, latitude and temperature and want to see if I can > find groups (clusters). > > Following some tutorials I can look for principal components > but get an error with calculation of distances: > > > matriz.distancias<-dist(comp.obs) > Error in vector("double", length) : specified vector size is > too big (translated from spanish) > > So, my questions are: is the dataset too big? could you point > me to any docs explaining how to study spatially distributed > data (lon,lat,data)? > > Thanks in advance > > > ______________________________________________________________ > _____________________________________ > Francisco Pastor > Meteorology department > Fundación CEAM > [EMAIL PROTECTED] > http://www.gva.es/ceamet > http://www.gva.es/ceam > Paterna, Valencia, Spain > ______________________________________________________________ > _____________________________________ > Usuario Linux registrado: 363952 > > ______________________________________________ > [email protected] mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide > http://www.R-project.org/posting-guide.html > and provide commented, minimal, self-contained, reproducible code. > ______________________________________________ [email protected] mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
