Re: [R] save a data frame in environment

[Uwe Ligges]

On 27.04.2010 12:13, arnaud Gaboury wrote:
If I add these 2 lines in my function :

Return(PositionFut)
Return(PositionLme)

Then, once the function is ran, when I do a ls(), I still don't see these 2
objects.


Oh, come on, can't you read basic documentation about R and ?return?

You can only return *1* object, hence you need to return a list of the 
two data.frames, as I said,

moreover, you need to assign the value fromyour function call to some 
object name in the environemnt you call your function from.

Uwe Ligges


-----Original Message-----
From: Uwe Ligges [mailto:lig...@statistik.tu-dortmund.de]
Sent: Tuesday, April 27, 2010 11:44 AM
To: arnaud Gaboury
Cc: r-help@r-project.org
Subject: Re: [R] save a data frame in environment

Don't print them but return() them from your function position() within
a list. Then you will have a list of two data.frames for later usage
assigned to your list.


Uwe Ligges


On 27.04.2010 11:37, arnaud Gaboury wrote:
Dear group,



Here is my function :







position<-function(x)

{




pose<-
read.csv2((paste(c("LSCPos",x,".csv"),collapse="")),dec=".",sep=",",as
.is=T,h=T,skip=1)[,c(4,8,14,15)]

    pose$CREATED.DATE<-as.Date(pose$CREATED.DATE,"%d/%m/%y")

    futures<-pose[-grep("USD",pose[,1]),]


    colnames(futures)<-
c("CONTRAT","CREATED.DATE","QUANTITY","SETTLEMENT")

    lme<-pose[grep("USD",pose[,1]),]

    lme$DESCRIPTION<- gsub(" *(\\d+/\\d+/\\d+) *$", "",
lme$DESCRIPTION)

    library(plyr)

    PositionFut<-ddply(futures, c("CONTRAT","SETTLEMENT"), summarise,
POSITION=sum(QUANTITY))[,c(1,3,2)]

    PositionLme<-unique(ddply(lme, c("DESCRIPTION"), summarise,

POSITION=sum(QUANITY),DATE=max(CREATED.DATE),SETTLEMENT=CLOSING.PRICE[C
REATE
D.DATE == max(CREATED.DATE)]))[,-3]





    print(PositionFut)

    print(PositionLme)



}



As I'm totally new to this kind of sport, i.e. writing code, the code
is
maybe ugly, but it does work. Now, one thing is missing.

   I want to have the 2 Dataframes "PositionFut"&   "PositionLme" in my
environment, as I will need them later for another function. If I do
a
save(), it will be saved in my directory, but won't see it when I do
ls(),
even if I do a get() before. What is the process to save these 2
objects in
order to access them later in another function?





***************************

Arnaud Gaboury

Mobile: +41 79 392 79 56

BBM: 255B488F

***************************




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