[R] Problem with function

[Rui Barradas]

Hello,

There's nothing wrong with having 'thisCol' and 'thatCol' already defined or
not.
The problem is that your function does NOT return a value. Get rid of the
assignment and it will work.


CompFunct <- function(thisCol, thatCol) {cbind(finalTable[, thisCol],
finalTable[, thatCol])}


I would also include a data.frame argument,

CompFunct2 <- function(x, thisCol, thatCol) {cbind(x[, thisCol], x[,
thatCol])}
CompFunct2(finalTable, 2, 3)

(But the function is so simple that maybe it's purpose is to save some
keystrokes.)


Hope this helps,

Rui Barradas

acnunn wrote
> 
> Hi,
> 
> I'm new to R, so apologies in advance for the triviality of this question,
> but I was wondering if anyone could tell me why this function doesn't
> return the expected output, i.e. a matrix containing two columns from a
> large data frame called 'finalTable'? Oddly, the statement between the
> curly brackets works if run with 'thisCol' and 'thatCol' already defined.
> Any help would be much appreciated.
> 
> 
> 
> Here's what 'finalTable' looks like, if it helps:-
> 
> 
> 
> Many thanks, Adam
> 


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