Hi everyone,
I currently work on a S4 class that has the [ function. I want to capture
the unevaluated expression corresponding to the i param using substitute()
function and do a non-standard evaluation. However R automatically
evaluates the expression and give me its value.
For example:
Given mydf[mydf$V1 > 1,] with mydf is an object of my custom S4 dataframe
class and V1 is one of its columns, I want to get the unevaluated
expression mydf$V1 > 1.
My questions are:
1. Is it possible to do that in R?
2. If yes, how to do?
My R version and OS info are:
R version 2.15.3 (2013-03-01) -- "Security Blanket"
Copyright (C) 2013 The R Foundation for Statistical Computing
ISBN 3-900051-07-0
Platform: x86_64-pc-linux-gnu (64-bit)
This is the first time I post to the mailing list, so please forgive any
mistakes and/or advise me if possible.
Regards,
Nhan Vu
[[alternative HTML version deleted]]
______________________________________________
R-help@r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
