[R] error in rowSums:'x' must be numeric

[Illyes Eszter]

Dear All, 

It's Eszter again from Hungary. I could not solve my problem form 
yesterday, so I still have to ask your help.

I have a binary dataset of vegetation samples and species as a comma 
separated file. I would like to calculate the Jaccard distance of the 
dataset. I have the following error message: 

Error in rowSums(x, prod(dn), p, na.rm) : 'x' must be numeric
In addition: Warning message:
results may be meaningless because input data have negative entries
 in: vegdist(t2, method = "jaccard", binary = FALSE, diag = FALSE,  

Do you have any idea what can be the problem? I have only 0 and 1 in 
the dataset. 

Thank you very much! All the best:


Eszter


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