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 appropriate.

[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

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 about