[R] Indicator Species analysis; trouble with multipatt

Jim Lemon drjimlemon at gmail.com
Tue Apr 19 01:11:30 CEST 2016

Hi Ansley,
Without your data file (or a meaningful subset) we can only guess, but
you may be trying to define groups on the columns rather than the rows
of the data set. Usually rows represent cases and each case must have
a value for the grouping variable.


On Tue, Apr 19, 2016 at 6:33 AM, Ansley Silva <daily.puja at gmail.com> wrote:
> Hello,
> *Error in tx  %*% comb : non-conformable arguments*
> Suggestions greatly appreciated.  I am a beginner and this is my first time
> posting.
> I would like to get the summary for indicator species analysis, using
> package indicspecies with multipatt.  I am getting errors, I believe, do to
> my data organization.  After reorganizing and reorganizing, nothing has
> helped.
>> data<- read.csv(file="Data1.csv", header=TRUE, row.names=1, sep=",")
>> ap<-data[c(1:24, 1:81)]
>> groups<-c(rep(1:4,6))
>> indval<- multipatt(ap, groups, control = how(nperm=999))
> *Error in tx  %*% comb : non-conformable arguments*
> --
> Ansley Silva
> *"The clearest way into the Universe is through a forest wilderness." John
> Muir*
> *Graduate Research Assistant*
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