Re: [R-sig-eco] ordination and clustering with continous and categorical variables

2010-12-22 Thread Gavin Simpson
On Sun, 2010-12-19 at 21:07 +0100, Mario Brusadin wrote: Dear all, Apologies in advance for the total beginner's question. I would like to perform a simple ordination on a dataset of species traits, contaning both continous and categorical variables, as well as a cluster analysis on the

Re: [R-sig-eco] ordination and clustering with continous and categorical variables

2010-12-21 Thread Tyler Smith
Mario Brusadin mario.brusa...@gmail.com writes: I would like to perform a simple ordination on a dataset of species traits, contaning both continous and categorical variables, as well as a cluster analysis on the same dataset. ... I would possibly like to overlay the results of the cluster

Re: [R-sig-eco] ordination and clustering with continous and categorical variables

2010-12-21 Thread Etienne Laliberte
Dear Mario, For the Gower dissimilarity you may want to check Library(FD) ?gowdis which allows weights to be assigned to traits/variables (sometimes useful), and implements Podani's 1999 approach for ordinal traits/variables. Cheers Etienne -Original Message- From:

Re: [R-sig-eco] ordination and clustering with continous and categorical variables

2010-12-21 Thread Marcus Cianciaruso
Dear Mario Just adding up to the previous suggestions made by Etienne and Tyler: A paper by Sandrine Pavoine et al. published last year in Oikos (Pavoine S et al. 2009. On the challenge of treating various types of variables: application for improving the measurement of functional diversity.