Hi,

I want to use reutils to obtain the accession numbers of a query search in character format. When I use efetch, the accession number isn't in a character format, and I'm not sure if the number is accurate, because I get the error:

Error in file.exists(destfile) : object 'destfile' not found

This is what I tried:

UIDs<-esearch( "Methylation" )

accession_numbers = efetch(UIDs, rettype = "acc")

How do I obtain only the accession number and is the number accruate? 

Thank you

The reutils package is a CRAN package. For those packages you should either ask on R-help (r-help@r-project.org) or by contacting the maintainer directly.