Hello all ,
This is a pretty simple question I think but cannot find an answer on the
list or in my brain. I would like to iterate through a loop and use a
vector of strings to name a number of list elements. For instance
#Create vector of strings
Et<- c("ACC","RTL","WHL")
MeanValues_ <- list("ACC" = 1000, "RTL" = 2000,
"WHL" = 3000)
#Iterate through each element of vector
NewMeans_ <- list()
for(et in Et){
NewMeans_ <- c(NewMeans_,list(et = unlist(MeanValues_[et]) * .80 ))
}
Returns> NewMeans_
$et
ACC
800
$et
RTL
1600
$et
WHL
2400
But I want 'et' to be the object value of et, so it would be $ACC, $RTL,
and
$WHL. I realize there may be another way to actually do what I want to do
as far as applying the calculation but I have a bunch of code structured
around the need for my list coming in a certain way. Thanks
Josh
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Hello, Try NewMeans_ <- lapply(MeanValues_, `*`, 0.80) That's it. Note also that you could have used, after your loop, names(NewMeans_) <- Et But 'lapply' is much better. Hope this helps, Rui Barradas Em 20-06-2012 01:31, LCOG1 escreveu:> Hello all , > This is a pretty simple question I think but cannot find an answer on the > list or in my brain. I would like to iterate through a loop and use a > vector of strings to name a number of list elements. For instance > > #Create vector of strings > Et<- c("ACC","RTL","WHL") > MeanValues_ <- list("ACC" = 1000, "RTL" = 2000, "WHL" = 3000) > > #Iterate through each element of vector > NewMeans_ <- list() > for(et in Et){ > NewMeans_ <- c(NewMeans_,list(et = unlist(MeanValues_[et]) * .80 )) > } > > Returns >> NewMeans_ > $et > ACC > 800 > > $et > RTL > 1600 > > $et > WHL > 2400 > > But I want 'et' to be the object value of et, so it would be $ACC, $RTL, and > $WHL. I realize there may be another way to actually do what I want to do > as far as applying the calculation but I have a bunch of code structured > around the need for my list coming in a certain way. Thanks > > Josh > > -- > View this message in context: http://r.789695.n4.nabble.com/Using-object-as-literal-value-in-list-vector-tp4633912.html > Sent from the R help mailing list archive at Nabble.com. > > ______________________________________________ > R-help at 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. >
Yes I feel foolish as this was the solution I finally came up with. It came to
me in the shower, once I was able to pull myself out of the code and think for a
while. Thanks for you insights
JR
-----Original Message-----
From: arun [mailto:smartpink111 at yahoo.com]
Sent: Wednesday, June 20, 2012 1:14 PM
To: ROLL Josh F
Cc: R help
Subject: Re: [R] Using object as literal value in list vector
Hi,
You can try:
NewMeans<-split(matrix(unlist(MeanValues_)*0.80),1:nrow(matrix(unlist(MeanValues_)*0.80)))
names(NewMeans)<-names(MeanValues_)
NewMeans
$ACC
[1] 800
$RTL
[1] 1600
$WHL
[1] 2400
A.K.
----- Original Message -----
From: LCOG1 <jroll at lcog.org>
To: r-help at r-project.org
Cc:
Sent: Tuesday, June 19, 2012 8:31 PM
Subject: [R] Using object as literal value in list vector
Hello all ,
? This is a pretty simple question I think but cannot find an answer on the list
or in my brain.? I would like to iterate through a loop and use a vector of
strings to name a number of list elements.? For instance
? ? ? #Create vector of strings
??? Et<- c("ACC","RTL","WHL")
??? MeanValues_ <- list("ACC" = 1000, "RTL" = 2000,
"WHL" = 3000)
??? #Iterate through each element of vector
??? NewMeans_ <- list()
??? for(et in Et){
??? ??? NewMeans_ <- c(NewMeans_,list(et = unlist(MeanValues_[et]) * .80 ))
??? }
Returns> NewMeans_
$et
ACC
800
$et
RTL
1600
$et
WHL
2400
But I want 'et' to be the object value of et, so it would be $ACC, $RTL,
and $WHL.? I realize there may be another way to actually do what I want to do
as far as applying the calculation but I have a bunch of code structured around
the need for my list coming in a certain way.? Thanks
Josh
--
View this message in context:
http://r.789695.n4.nabble.com/Using-object-as-literal-value-in-list-vector-tp4633912.html
Sent from the R help mailing list archive at Nabble.com.
______________________________________________
R-help at 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.