[R] re siduals from pcaiv

[Mark Difford]

Hi Nikolaos,

>> How can I extract the residuals from a pcaiv/rda in ade4?

>From what you can remember, you can get them as follows (ade4):

## If your call to pcaiv was as follows:
pcaiv(dudi$obj, df=FactorIV, scannf=F, nf=4)

## then get your residuals as follows:
ortho <- pcaivortho(dudi$obj, df=FactorIV, scannf=F, nf=4)
ortho$tab                   ## (weighted) residuals == projected variables
with df removed == residuals
print(ortho)

You would do well to post your query on the ade4list, where the
authors/co-authors of the ade4 package are likely to reply.

HTH, Mark.


Nikolaos Fyllas wrote:
> 
> Dear R users,
> 
> How can I extract the residuals from a pcaiv/rda in ade4?
> 
> In Vegan there is the
> residuals()
> function, giving the approximation of the original data from the
> unconstrained ordination
> Is there something similar in ade4?
> 
> Nikos
> 
> ______________________________________________
> R-help at 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.
> 
> 

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