[R] Doubts about ADE-4

[David Winsemius]

On Dec 18, 2009, at 6:49 AM, Diogo B. Provete wrote:

> Hi,
> I'm having some troubles in using the ADE-4 package. I want to  
> analyze data
> for the Outlying Mean Index in the function 'niche'. I've got two  
> matrixes:
> one for environmental data and the other for species abundance data.  
> But to
> implement the analysis, as I understand it, I need to put tocheger  
> these two
> matrixes in one, as in the example provided with the package. Un  
> fortunately
> I don't know how to do this. Could anyone help me?

Not familiar with the application you are rather vaguely describing,  
but the two functions for "putting two matrices together" would be  
rbind and cbind depending on whether you want them bound "side by  
side" or "on top of each other".

(I am reasonably sure that there is no ADE-4 package. This is R ...  
capitalization and punctuation matter ... please spell package names  
precisely as they are named.)

For the life of me I cannot see how one uses cbind or rbind for  
arguments to "niche". It takes as arguments the results of functions  
that create duality diagrams. The example data set on the niche help  
page is a 3 element list of dataframes each with 30 rows. So you  
should should be asking how to create lists of dataframes (not  
matrices) in a manner that parallels the output of :

library(ade4)
data(doubs)
str(doubs)

You should also be providing a much more complete description of your  
R objects, at a minimum the results of str on them.


> Thank you in advance.
>
> -- 
> Respectfully,
> Diogo Borges Provete



David Winsemius, MD
Heritage Laboratories
West Hartford, CT