[R] writing function:loop and rbind

[arnaud Gaboury]

One solution is to create a list, then do.call.
Here is my environment:

> ls()
 [1] "DailyPL100416" "DailyPL100419" "DailyPL100420" "l"             "ll"
"PLglobal"      "Pos100415"     "Pos100416"     "Pos100419"     "Pos100420"
"position"      "r"            
[13] "result"        "sel"           "select"        "Trad100415"
"Trad100416"    "Trad100419"    "Trad100420"    "trade"         "tt"
"w"  

>   l<-list(grep("DailyPL",ls(),value=T))   #create a list of elements with
DailyPL in the name

> l
[[1]]
[1] "DailyPL100416" "DailyPL100419" "DailyPL100420"

> DF<-do.call("rbind",l)
> DF
     [,1]            [,2]            [,3]           
[1,] "DailyPL100416" "DailyPL100419" "DailyPL100420"

That's not what I want! I expect "DF" to be a data.frame binded by row.

I suspect there is an issue with get() or assign(), or something like that.

Any help is appreciated.






> -----Original Message-----
> From: arnaud Gaboury [mailto:arnaud.gaboury at gmail.com]
> Sent: Monday, May 24, 2010 2:55 PM
> To: r-help at r-project.org
> Cc: 'arnaud Gaboury'
> Subject: writing function:loop and rbind
> 
> Dear group,
> 
> I have a function, let's call it myfun, wich give me a list of result:
> R1,R2,R3...
> There is a loop in this function to get my results. Here is the
> structure of
> my function:
> 
> Myfun<-function()
> 
> {
> For (i in X ){
> 
> -----------instructions---------
> 
> Ri
> 
> {
> {
> 
> All Results (R1,R2...) are Data.frame. As a final result (call it
> "Final"),
> I need to rbind all these dataframe. One solution could be to create
> another
> loop, but I think I can avoid it. How can I add a line like this :
> Final<-rbind(R1,R2...) using the i parameter? Another solution could
> may be
> to create a list of all my results, then apply rbind to the list?
> 
> Any idea would be appreciated.
> 
> TY in advance