see: ?sample library(vegan) ?rrarefy not knowing your data structure, its hard to say.
camilleislande wrote > > Hello > I have several populations where I have morphology and diet for each > individual. I am interested in the correlation between diet and > morphological distances. However the number of individuals in each > population ranges from 22 to 80 individuals. I have looked at the > correlation diet-morphology for each population and (not surprisingly) the > correlation coefficientis is highly correlated with the number of > individuals per population. > > I would like to resample (without replacement) the populations with 60-80 > individuals and get random samplings of 30 individuals (1000 times). I > would like to get a correlation coefficient distribution against which to > test the original value of the correlation. > > I guess it is possible do this, however I have never written a script in R > and I am not familiar with resampling techniques at all. Any help with > coding will be greatly appreciated > > Thank you > -- View this message in context: http://r.789695.n4.nabble.com/How-to-resample-matrices-to-test-for-the-robustness-of-their-correlation-tp4397915p4399189.html Sent from the R help mailing list archive at Nabble.com. ______________________________________________ R-help@r-project.org 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.
