Hello all,
I consider myself pretty new to the whole OO based programming so
I'm sorry if I'm doing something stupid.
> xml<-read.metlin(url)
Error in function (classes, fdef, mtable) :
unable to find an inherited method for function "read.metlin",
for signature "url"
>read.metlin
standardGeneric for "read.metlin" defined from package ".GlobalEnv"
function (xml, ...)
standardGeneric("read.metlin")
<environment: 0x83a8ae4>
Methods may be defined for arguments: xml
> url
description
"http://metlin.scripps.edu/download/MSMS_test.XML";
class
"url"
mode
"r"
text
"text"
opened
"closed"
can read
"yes"
can write
"no"
I defined my methods as :
if (!isGeneric("read.metlin") )
setGeneric("read.metlin", function(xml) standardGeneric("read.metlin"))
setMethod("read.metlin", "xcmsRaw", function(xml) {
#Parsing the METLIN XML File
reading<-readLines(xml)
# do rest of script
})
Any help as to why I'm getting the inherited method error would be great.
Cheers,
Paul
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