Hi [EMAIL PROTECTED] napsal dne 08.10.2007 13:20:56:
> > I just have started using R. I am working with abundance data (57 parasite > species found in cod) and I would like to know if there is possible to > transform all the data matrix. I read that in LDA it is possible to do it By data matrix you mean data frame? However both matrix or numeric data frame can be transformed by log(x+1) if x is your data. Regards Petr > with log transformation but I need log (x+1) transformation because I have > many "0". It is important for me because I am testing random Forest and LDA > and I did 160 random files (training and testing files). > > Thank you very much > > All the best > -- > View this message in context: http://www.nabble.com/How-transform-log%28x%2B1% > 29-all-data-matrix--tf4587543.html#a13094677 > 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. ______________________________________________ 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.
