What do you get when you type in these commands?

lapply(mzbtaxa, class)
lapply(mzbsites, class)

Do you get the same error if you use the as.is=TRUE argument in the
read.csv() function?

mzbtaxa<-read.csv("MZBTaxa.csv", header=TRUE, dec=",", sep=";", as.is=TRUE)
mzbsites<-read.csv("MZBSites.csv", header=TRUE, dec=",", sep=";", as.is=TRUE
)

Jean



On Wed, May 29, 2013 at 11:16 AM, Wobbe Gong <wobbegong85@gmail.com> wrote:

> Hi,
>
> I have a problem that appears to be quite common - warnings that 'x' must
> be numeric. How can I get rid of that problem?
>
> specifically, I am trying to run an mrpp with a species-site data set plus
> a second file containing factors. Both files are saved as .csv and comma
> separated. I have tried  to remove the column titles in a number of ways to
> not cause the problem to begin with, but r wasn't really impressed.
>
> what I've done so far is:
> #reading my species-site data set
> mzbtaxa<-read.csv("MZBTaxa.csv", header=TRUE, dec=",", sep=";")
> mzbtaxa
> names(mzbtaxa)
>
> #reading my factors file
> mzbsites<-read.csv("MZBSites.csv", header=TRUE, dec=",", sep=";")
> mzbsites
> names(mzbsites)
>
> #loading package
> library(vegan)
>
> ##trying to run mrpp
> mzbtaxa.mrpp <- mrpp(mzbtaxa, mzbsites$Site, distance = "bray")
>
> ##which is where I get my warning 'x' must be numeric. Any ideas how to
> deal with that?
>
> Many thanks in advance,
>
> Claudia Pogoreutz
>
>         [[alternative HTML version deleted]]
>
> ______________________________________________
> R-help@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.
>

	[[alternative HTML version deleted]]

