On 10/22/2011 02:11 AM, Omphalodes Verna wrote:
Hi R-helper!
I have problem with setMethods for "[". Here is example :
setClass("myClass", representation(ID.r = "numeric", ID.c = "character", DAT =
"matrix"))
to.myClass<- function(ID.r, ID.c, DAT) {
out<- new("myClass", ID.r = ID.r, ID.c = ID.c, DAT = DAT)
return(out)
}
setMethod("[", "myClass", function(x, i, j, drop) {
[email protected]<- [email protected][i]
[email protected]<- [email protected][j]
out.0<- x@DAT[i,j]
out.1<- to.myClass([email protected], [email protected], as.matrix(out.0))
return(out.1)
})
a<- to.myClass(seq(1,25), c("A","A","B","B"), matrix(rnorm(100), nrow = 25))
a
a[1:20, ] #works
a[, 1:3] #works
a[1:10, 1:3] #works
a[, "A"] #not works
thinking about your code, this is the same as
> ID.c = c("A","A","B","B")
> j = "A"
> ID.c[j]
[1] NA
What is solution to write "[" methods for extraction by names of Slot "ID.c"
Maybe (untested)
setMethod("[", c("myClass", "ANY", "character"),
function(x, i, j, ..., drop=TRUE) {
j = match(j, [email protected])
x[i, j, ..., drop=TRUE]
})
Thanks all. OV
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______________________________________________
[email protected] mailing list
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PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
