subject:"\[R\] PCA or CA"

Re: [R] PCA or CA

2009-09-30 Thread Bernardo Rangel Tura

On Tue, 2009-09-29 at 17:02 +, Paul Dennis wrote: > Dear all > > I have a data set for which PCA based between group analysis (BGA) gives > significant results but CA-BGA does not. > > I am having difficulty finding a reliable method for deciding which > ordination technique is most appropr

Re: [R] PCA or CA

2009-09-29 Thread Mark Difford

Hi Paul, >> I have a data set for which PCA based between group analysis (BGA) gives >> significant results but CA-BGA does not. >> I am having difficulty finding a reliable method for deciding which >> ordination >> technique is most appropriate. Reliability really comes down to you thinking

[R] PCA or CA

2009-09-29 Thread Paul Dennis

Dear all I have a data set for which PCA based between group analysis (BGA) gives significant results but CA-BGA does not. I am having difficulty finding a reliable method for deciding which ordination technique is most appropriate. I have been told to do a 1 table CA and if the 1st axis is>