Re: [R] How to use the paste function to create an already used variable
"Biedermann, Jürgen" wrote:
>
> Perfekt!
>
> So, the code below does, what I want it does.
>
> for (m in 1:AnzRat) {
> Daten_akt <- eval(parse(text=paste("Daten",m,"_akt",sep="")))
> ...
> ...
> assign(paste("Daten",m,"_akt",sep=""),Daten_akt)
> }
>
You may want to consider replacing eval(parse()) with a call to get().
eval(parse()) does the job- but it's like using a sledgehammer when you have
a tack hammer available that will work just fine.
-Charlie
-
Charlie Sharpsteen
Undergraduate-- Environmental Resources Engineering
Humboldt State University
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Re: [R] How to use the paste function to create an already used variable
Perfekt!
So, the code below does, what I want it does.
for (m in 1:AnzRat) {
Daten_akt <- eval(parse(text=paste("Daten",m,"_akt",sep="")))
...
...
assign(paste("Daten",m,"_akt",sep=""),Daten_akt)
}
Patrick Burns schrieb:
> I think you are looking for 'assign'.
>
> On 25/03/2010 09:40, "Biedermann, Jürgen" wrote:
>
>> Thank you very much for the solutions! :-)
>>
>> It's my fault, but I forgot to mention that at the end of the loop, I
>> would like to give
>>
>> "Data" back to data1, data2, data3, data4
>>
>> The eval formula only seems to work in one direction (it's the same with
>> the get function)
>>
>> for (i in 1:4) {
>> Data[[i]]<- eval(parse(text = paste("data",i,sep="")))
>> ...
>> ...
>>
>> eval(parse(text = paste("data",i,sep="")))<- Data[[i]] # --> I get an
>> error message here
>>
>>
>> }
>>
>> I know that generally it's much better to stick to lists in this kind of
>> kontext,
>> but I don't wanna change the whole structure of the rest of my code.
>>
>> Thanks
>>
>> Greetings
>> Jürgen
>>
>>
>>
>>
>>
>>
>> David Winsemius schrieb:
>>
>>> On Mar 24, 2010, at 9:25 AM, Tal Galili wrote:
>>>
>>>
>>>
Try:
for (i in 1:4) {
Data<- eval(parse(text = paste("data",i,sep="")))
...
..
}
(and if there are other solutions - I would love to know)
>>> Well, it's not actually a solution since the first three fetched
>>> values would have been overwritten.
>>>
>>> Instead:
>>>
>>>Data<- list()
>>>for (i in 1:4) {
>>> Data[[i]]<- eval(parse(text = paste("data",i,sep=""))) }
>>>
>>>
Contact
Details:---
Contact me: tal.gal...@gmail.com | 972-52-7275845
Read me: www.talgalili.com (Hebrew) | www.biostatistics.co.il
(Hebrew) |
www.r-statistics.com (English)
--
2010/3/24 "Biedermann, Jürgen"
> Hi there,
>
> I have the following problem
>
> Four data frames exist:
>
> data1
> data2
> data3
> data4
>
> Now I want to write a loop and temporarily store the data1, data2,
> data3,
> data4 in a variable called data.
> I tried the following...
>
> for (i in 1:4) {
> Data<- paste("data",i,sep="")
> ...
> ..
> }
>
>
> but it doesn't function. I think the problem is the definition of
> the mode
> of the pasted variable.
>
> Could anyone help me?
> Thanks
>
> Greetings
> Jürgen
>
> __
> R-help@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.
>
>
>
[[alternative HTML version deleted]]
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PLEASE do read the posting guide
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and provide commented, minimal, self-contained, reproducible code.
>>> David Winsemius, MD
>>> West Hartford, CT
>>>
>>>
>>>
>> [[alternative HTML version deleted]]
>>
>>
>>
>>
>> __
>> R-help@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.
>>
>
>
[[alternative HTML version deleted]]
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Re: [R] How to use the paste function to create an already used variable
Thank you very much for the solutions! :-)
It's my fault, but I forgot to mention that at the end of the loop, I
would like to give
"Data" back to data1, data2, data3, data4
The eval formula only seems to work in one direction (it's the same with
the get function)
for (i in 1:4) {
Data[[i]] <- eval(parse(text = paste("data",i,sep="")))
...
...
eval(parse(text = paste("data",i,sep=""))) <- Data[[i]] # --> I get an
error message here
}
I know that generally it's much better to stick to lists in this kind of
kontext,
but I don't wanna change the whole structure of the rest of my code.
Thanks
Greetings
Jürgen
David Winsemius schrieb:
> On Mar 24, 2010, at 9:25 AM, Tal Galili wrote:
>
>
>> Try:
>>
>> for (i in 1:4) {
>> Data <- eval(parse(text = paste("data",i,sep="")))
>> ...
>> ..
>> }
>>
>>
>> (and if there are other solutions - I would love to know)
>>
>
> Well, it's not actually a solution since the first three fetched
> values would have been overwritten.
>
> Instead:
>
> Data <- list()
> for (i in 1:4) {
> Data[[i]] <- eval(parse(text = paste("data",i,sep=""))) }
>
>>
>> Contact
>> Details:---
>> Contact me: tal.gal...@gmail.com | 972-52-7275845
>> Read me: www.talgalili.com (Hebrew) | www.biostatistics.co.il
>> (Hebrew) |
>> www.r-statistics.com (English)
>> --
>>
>>
>>
>>
>> 2010/3/24 "Biedermann, Jürgen"
>>
>>
>>> Hi there,
>>>
>>> I have the following problem
>>>
>>> Four data frames exist:
>>>
>>> data1
>>> data2
>>> data3
>>> data4
>>>
>>> Now I want to write a loop and temporarily store the data1, data2,
>>> data3,
>>> data4 in a variable called data.
>>> I tried the following...
>>>
>>> for (i in 1:4) {
>>> Data <- paste("data",i,sep="")
>>> ...
>>> ..
>>> }
>>>
>>>
>>> but it doesn't function. I think the problem is the definition of
>>> the mode
>>> of the pasted variable.
>>>
>>> Could anyone help me?
>>> Thanks
>>>
>>> Greetings
>>> Jürgen
>>>
>>> __
>>> R-help@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.
>>>
>>>
>> [[alternative HTML version deleted]]
>>
>> __
>> R-help@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.
>>
>
> David Winsemius, MD
> West Hartford, CT
>
>
[[alternative HTML version deleted]]
__
R-help@r-project.org mailing list
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Re: [R] How to use the paste function to create an already used variable
Try this:
Data <- lapply(ls(pattern = 'data[0-9]'), get)
Data[[1]] is data1
Data[[2]] is data2
etc.
2010/3/24 "Biedermann, Jürgen" :
> Hi there,
>
> I have the following problem
>
> Four data frames exist:
>
> data1
> data2
> data3
> data4
>
> Now I want to write a loop and temporarily store the data1, data2, data3,
> data4 in a variable called data.
> I tried the following...
>
> for (i in 1:4) {
> Data <- paste("data",i,sep="")
> ...
> ..
> }
>
>
> but it doesn't function. I think the problem is the definition of the mode
> of the pasted variable.
>
> Could anyone help me?
> Thanks
>
> Greetings
> Jürgen
>
> __
> R-help@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.
>
--
Henrique Dallazuanna
Curitiba-Paraná-Brasil
25° 25' 40" S 49° 16' 22" O
__
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and provide commented, minimal, self-contained, reproducible code.
Re: [R] How to use the paste function to create an already used variable
On 24/03/2010 9:25 AM, Tal Galili wrote:
Try:
for (i in 1:4) {
Data <- eval(parse(text = paste("data",i,sep="")))
...
..
}
(and if there are other solutions - I would love to know)
The get() function is simpler if you're just retrieving a variable:
Data <- get(paste("data", i, sep=""))
Duncan Murdoch
Contact
Details:---
Contact me: tal.gal...@gmail.com | 972-52-7275845
Read me: www.talgalili.com (Hebrew) | www.biostatistics.co.il (Hebrew) |
www.r-statistics.com (English)
--
2010/3/24 "Biedermann, Jürgen"
> Hi there,
>
> I have the following problem
>
> Four data frames exist:
>
> data1
> data2
> data3
> data4
>
> Now I want to write a loop and temporarily store the data1, data2, data3,
> data4 in a variable called data.
> I tried the following...
>
> for (i in 1:4) {
> Data <- paste("data",i,sep="")
> ...
> ..
> }
>
>
> but it doesn't function. I think the problem is the definition of the mode
> of the pasted variable.
>
> Could anyone help me?
> Thanks
>
> Greetings
> Jürgen
>
> __
> R-help@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.
>
[[alternative HTML version deleted]]
__
R-help@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.
__
R-help@r-project.org mailing list
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PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
Re: [R] How to use the paste function to create an already used variable
On Mar 24, 2010, at 9:25 AM, Tal Galili wrote:
Try:
for (i in 1:4) {
Data <- eval(parse(text = paste("data",i,sep="")))
...
..
}
(and if there are other solutions - I would love to know)
Well, it's not actually a solution since the first three fetched
values would have been overwritten.
Instead:
Data <- list()
for (i in 1:4) {
Data[[i]] <- eval(parse(text = paste("data",i,sep=""))) }
Contact
Details:---
Contact me: tal.gal...@gmail.com | 972-52-7275845
Read me: www.talgalili.com (Hebrew) | www.biostatistics.co.il
(Hebrew) |
www.r-statistics.com (English)
--
2010/3/24 "Biedermann, Jürgen"
Hi there,
I have the following problem
Four data frames exist:
data1
data2
data3
data4
Now I want to write a loop and temporarily store the data1, data2,
data3,
data4 in a variable called data.
I tried the following...
for (i in 1:4) {
Data <- paste("data",i,sep="")
...
..
}
but it doesn't function. I think the problem is the definition of
the mode
of the pasted variable.
Could anyone help me?
Thanks
Greetings
Jürgen
__
R-help@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.
[[alternative HTML version deleted]]
__
R-help@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.
David Winsemius, MD
West Hartford, CT
__
R-help@r-project.org mailing list
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PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
Re: [R] How to use the paste function to create an already used variable
Try:
for (i in 1:4) {
Data <- eval(parse(text = paste("data",i,sep="")))
...
..
}
(and if there are other solutions - I would love to know)
Contact
Details:---
Contact me: tal.gal...@gmail.com | 972-52-7275845
Read me: www.talgalili.com (Hebrew) | www.biostatistics.co.il (Hebrew) |
www.r-statistics.com (English)
--
2010/3/24 "Biedermann, Jürgen"
> Hi there,
>
> I have the following problem
>
> Four data frames exist:
>
> data1
> data2
> data3
> data4
>
> Now I want to write a loop and temporarily store the data1, data2, data3,
> data4 in a variable called data.
> I tried the following...
>
> for (i in 1:4) {
> Data <- paste("data",i,sep="")
> ...
> ..
> }
>
>
> but it doesn't function. I think the problem is the definition of the mode
> of the pasted variable.
>
> Could anyone help me?
> Thanks
>
> Greetings
> Jürgen
>
> __
> R-help@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.
>
[[alternative HTML version deleted]]
__
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and provide commented, minimal, self-contained, reproducible code.
