[R] Remove from a string
Hi all! I have lots of functions called in the following pattern 'NameOfFunctionNumber' where the name always stays the same and the number varies from 1 to 98. Another function which I run in advance returns the number of the function which has to be called next. Now I want to combine 'NameOfFunction' with the 'Number' returned so that i can call the desired function. I do this by: x-c(NameOfFunction,Number) z-paste(x,collapse=) z which returns NameOfFunctionNumber My Problem is that R doesn't recognise this as the name of my function because of the at the beginning and the end. Is there a way of getting rid of those? Or does anybody know another way of solving this problem? Thanks a lot for your help! Cheers, Katharina [[alternative HTML version deleted]] __ R-help@stat.math.ethz.ch 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.
Re: [R] Remove from a string
Try using 'get' to return the object specified as a character string: f1-function()1 f2 - function()2 z - 'f2' z [1] f2 get(z)() [1] 2 On 12/8/06, Katharina Vedovelli [EMAIL PROTECTED] wrote: Hi all! I have lots of functions called in the following pattern 'NameOfFunctionNumber' where the name always stays the same and the number varies from 1 to 98. Another function which I run in advance returns the number of the function which has to be called next. Now I want to combine 'NameOfFunction' with the 'Number' returned so that i can call the desired function. I do this by: x-c(NameOfFunction,Number) z-paste(x,collapse=) z which returns NameOfFunctionNumber My Problem is that R doesn't recognise this as the name of my function because of the at the beginning and the end. Is there a way of getting rid of those? Or does anybody know another way of solving this problem? Thanks a lot for your help! Cheers, Katharina [[alternative HTML version deleted]] __ R-help@stat.math.ethz.ch 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. -- Jim Holtman Cincinnati, OH +1 513 646 9390 What is the problem you are trying to solve? [[alternative HTML version deleted]] __ R-help@stat.math.ethz.ch 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.
Re: [R] Remove from a string
If I understand what you need, Number=2 x - paste(NameOfFunction,as.character(Number),sep=) x [1] NameOfFunction2 And you can use do.call(x, ...) to get your function. Hope it helps, Scionforbai __ R-help@stat.math.ethz.ch 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.
Re: [R] Remove from a string
try this: f1 - function(x) x + 1 f2 - function(x) x + 2 f3 - function(x) x + 3 ### FunNam - f1 eval(call(FunNam, x = 1:5)) FunNam - f2 eval(call(FunNam, x = 1:5)) FunNam - f3 eval(call(FunNam, x = 1:5)) I hope it helps. Best, Dimitris Dimitris Rizopoulos Ph.D. Student Biostatistical Centre School of Public Health Catholic University of Leuven Address: Kapucijnenvoer 35, Leuven, Belgium Tel: +32/(0)16/336899 Fax: +32/(0)16/337015 Web: http://med.kuleuven.be/biostat/ http://www.student.kuleuven.be/~m0390867/dimitris.htm - Original Message - From: Katharina Vedovelli [EMAIL PROTECTED] To: r-help@stat.math.ethz.ch Sent: Friday, December 08, 2006 2:57 PM Subject: [R] Remove from a string Hi all! I have lots of functions called in the following pattern 'NameOfFunctionNumber' where the name always stays the same and the number varies from 1 to 98. Another function which I run in advance returns the number of the function which has to be called next. Now I want to combine 'NameOfFunction' with the 'Number' returned so that i can call the desired function. I do this by: x-c(NameOfFunction,Number) z-paste(x,collapse=) z which returns NameOfFunctionNumber My Problem is that R doesn't recognise this as the name of my function because of the at the beginning and the end. Is there a way of getting rid of those? Or does anybody know another way of solving this problem? Thanks a lot for your help! Cheers, Katharina [[alternative HTML version deleted]] __ R-help@stat.math.ethz.ch 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. Disclaimer: http://www.kuleuven.be/cwis/email_disclaimer.htm __ R-help@stat.math.ethz.ch 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.
Re: [R] Remove from a string
On Fri, 2006-12-08 at 14:57 +0100, Katharina Vedovelli wrote: Hi all! I have lots of functions called in the following pattern 'NameOfFunctionNumber' where the name always stays the same and the number varies from 1 to 98. Another function which I run in advance returns the number of the function which has to be called next. Now I want to combine 'NameOfFunction' with the 'Number' returned so that i can call the desired function. I do this by: x-c(NameOfFunction,Number) z-paste(x,collapse=) z which returns NameOfFunctionNumber My Problem is that R doesn't recognise this as the name of my function because of the at the beginning and the end. Is there a way of getting rid of those? Or does anybody know another way of solving this problem? Thanks a lot for your help! Cheers, Katharina It is not entirely clear what your ultimate goal is, thus there may be a (much) better approach than calling functions in this manner. What do the functions actually do and does the output vary based upon some attribute (ie. the class) of the argument such that using R's typical function dispatch method would be more suitable. However, to address the specific question, at least two options: NameOfFunction21 - function(x) x^2 eval(call(paste(NameOfFunction, 21, sep = ), 21)) [1] 441 do.call(paste(NameOfFunction, 21, sep = ), list(21)) [1] 441 In both cases, the result is to evaluate the function call, with 21 as the argument. See ?call, ?eval and ?do.call for more information. HTH, Marc Schwartz __ R-help@stat.math.ethz.ch 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.
Re: [R] Remove from a string
The best approach is probably to load all of your functions into a list:
myfunctions - list()
myfunctions[[1]] - NameOfFunction1
myfunctions[[2]] - NameOfFunction2
...
Or
myfunctions - list()
for (i in 1:98){
+ myfunctions[[i]] - get( paste('NameOfFunction',i,sep='') )
+ }
Then you can run the function like:
myfunctions[[Number]](data, ...)
You could use 'get' directly, but the list of functions is probably
cleaner.
Hope this helps,
--
Gregory (Greg) L. Snow Ph.D.
Statistical Data Center
Intermountain Healthcare
[EMAIL PROTECTED]
(801) 408-8111
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Katharina
Vedovelli
Sent: Friday, December 08, 2006 6:57 AM
To: r-help@stat.math.ethz.ch
Subject: [R] Remove from a string
Hi all!
I have lots of functions called in the following pattern
'NameOfFunctionNumber' where the name always stays the same and the
number varies from 1 to 98.
Another function which I run in advance returns the number of the
function which has to be called next.
Now I want to combine 'NameOfFunction' with the 'Number' returned so
that i can call the desired function.
I do this by:
x-c(NameOfFunction,Number)
z-paste(x,collapse=)
z
which returns
NameOfFunctionNumber
My Problem is that R doesn't recognise this as the name of my function
because of the at the beginning and the end.
Is there a way of getting rid of those? Or does anybody know another way
of solving this problem?
Thanks a lot for your help!
Cheers,
Katharina
[[alternative HTML version deleted]]
__
R-help@stat.math.ethz.ch 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@stat.math.ethz.ch 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.
Re: [R] Remove from a string
I second Marc's comments below, but for amusement, another alternative to the (undesirable) eval(call()) construction is: foo-function(x)x^2 get(foo)(1:5) [1] 1 4 9 16 25 I believe this is equally undesirable, however, and as Marc said, making your function a function of two arguments or something similar would be the better approach. Bert Gunter Genentech Nonclinical Statistics South San Francisco, CA 94404 -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Marc Schwartz Sent: Friday, December 08, 2006 6:14 AM To: Katharina Vedovelli Cc: r-help@stat.math.ethz.ch Subject: Re: [R] Remove from a string On Fri, 2006-12-08 at 14:57 +0100, Katharina Vedovelli wrote: Hi all! I have lots of functions called in the following pattern 'NameOfFunctionNumber' where the name always stays the same and the number varies from 1 to 98. Another function which I run in advance returns the number of the function which has to be called next. Now I want to combine 'NameOfFunction' with the 'Number' returned so that i can call the desired function. I do this by: x-c(NameOfFunction,Number) z-paste(x,collapse=) z which returns NameOfFunctionNumber My Problem is that R doesn't recognise this as the name of my function because of the at the beginning and the end. Is there a way of getting rid of those? Or does anybody know another way of solving this problem? Thanks a lot for your help! Cheers, Katharina It is not entirely clear what your ultimate goal is, thus there may be a (much) better approach than calling functions in this manner. What do the functions actually do and does the output vary based upon some attribute (ie. the class) of the argument such that using R's typical function dispatch method would be more suitable. However, to address the specific question, at least two options: NameOfFunction21 - function(x) x^2 eval(call(paste(NameOfFunction, 21, sep = ), 21)) [1] 441 do.call(paste(NameOfFunction, 21, sep = ), list(21)) [1] 441 In both cases, the result is to evaluate the function call, with 21 as the argument. See ?call, ?eval and ?do.call for more information. HTH, Marc Schwartz __ R-help@stat.math.ethz.ch 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@stat.math.ethz.ch 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.
