Hello Everyone:
As usual, thanks in advance for any help.
I was hoping to get some more advice on this question:
I'm trying to write a subsetting routine for an S3 object I've created --
lets call it myObject.
myObject has a few attributes basically of type string and numerics. Its
atomic value is just a vector of ints.
I want to write my own subsetting routine to subset myObject in an
unconventional way.
So my method looks like this:
"[.myObject" <- function( obj, i, j, ...){
..... parameter checking and calculations....
print("Test")
}
If I call this method in an R session I get the following results:
obj <- "an instance of a myObject"
obj[]
OUTPUT:
Test
Test
Error: index of length zero.
I'm not sure how to prevent it from printing twice. I don't understand why
"print.default() is returning what it was asked to print, which then gets
printed again automatically" as was mentioned in a previous thread.
Does the solution involve creating a child class as mentioned here:
http://finzi.psych.upenn.edu/R/Rhelp02a/archive/77057.html
I'm having a difficult time following the execution steps for this R code:
obj[]
Again, thanks very much for any suggestions.
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