Sorry David for this belate thank. Your code helped me so much. I tested a
class that does not inherit the data.frame class and it also worked. Maybe
I had problems with different kinds of method signatures of [ function.
For example, this does not work:
setMethod("[", signature(x="BigDataFrame", j
On May 14, 2013, at 8:02 PM, David Winsemius wrote:
I think you need to read ?setClass and ?setMethod. There is an
example of defining a "[" method for a class that inherits from
'data.frame'. I suspect you need to capture the various
possibilities for the arguments being present or missin
I think you need to read ?setClass and ?setMethod. There is an example of
defining a "[" method for a class that inherits from 'data.frame'. I suspect
you need to capture the various possibilities for the arguments being present
or missing.
--
David
Sent from my iPhone
On May 14, 2013, at 5:
Dear David,
First, I would like to say thank you for your very soon reply. Second, I
want to clarify the question because it seems to not carrying exactly what
I want to ask. Let take an example on R data.frame:
V1 <- 1
df2 <- df[V1== 1,] # df is a data.frame, this command is correct, right?
The
On May 13, 2013, at 6:38 PM, Nhan Vu Lam Chi wrote:
> 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
> evalua
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 myd
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