R-help, Sometimes I define functions I wish to have in any R session. The obvious thing to do is copy-paste the code The thing is that sometimes I don't know where I have the function code. My question is if somehow I could define a function and "introduce" it (let's say 'base' package ) so that could be used anytime I run a different R project. Thank you in advance
Introduce a new function in a package?
5 messages · Luis Ridao Cruz, Roger D. Peng, Dimitris Rizopoulos +2 more
I think the usual way is to create an R package for yourself and load it when you need it for whatever project. -roger
Luis Ridao Cruz wrote:
R-help, Sometimes I define functions I wish to have in any R session. The obvious thing to do is copy-paste the code The thing is that sometimes I don't know where I have the function code. My question is if somehow I could define a function and "introduce" it (let's say 'base' package ) so that could be used anytime I run a different R project. Thank you in advance
______________________________________________ R-help at 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
or you could create a package containing all these functions and edit .Rprofile to load it at start-up (see also ?.Startup). Best, Dimitris ---- Dimitris Rizopoulos Ph.D. Student Biostatistical Centre School of Public Health Catholic University of Leuven Address: Kapucijnenvoer 35, Leuven, Belgium Tel: +32/16/336899 Fax: +32/16/337015 Web: http://www.med.kuleuven.ac.be/biostat/ http://www.student.kuleuven.ac.be/~m0390867/dimitris.htm ----- Original Message ----- From: "Luis Ridao Cruz" <Luisr at frs.fo> To: <r-help at stat.math.ethz.ch> Sent: Wednesday, April 06, 2005 3:47 PM Subject: [R] Introduce a new function in a package?
R-help, Sometimes I define functions I wish to have in any R session. The obvious thing to do is copy-paste the code The thing is that sometimes I don't know where I have the function code. My question is if somehow I could define a function and "introduce" it (let's say 'base' package ) so that could be used anytime I run a different R project. Thank you in advance
______________________________________________ R-help at 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
Expressions in .Rprofile are executed *before* any previously saved global environment is loaded (i.e., before the .RData file in the current working directory is loaded, causing the message " [Previously saved workspace restored]" to a appear). If you define a function in .Rprofile, and then later answer "yes" to the "Save workspace image?" question when you quit R, the function will exist in the saved workspace. When you next start R, the version that comes in from .Rprofile will be replaced by the version in the saved workspace -- because the saved workspace is loaded after .Rprofile is executed. This means that if you decide to change the function in .Rprofile, your changes will immediately be lost when the previously saved workspace is loaded, since that has the previous version. So defining personal utility functions in .Rprofile is not very effective. Much, much, better to create a package, and then require() that package in .Rprofile. And since creating a package is really very easy, I strongly recommend that option. Saving the functions in an image file and then attaching it is fine, but less convenient, in my opinion, since you have to keep track of where it is in the file system. -Don
At 4:09 PM +0100 4/6/05, Jan T. Kim wrote:
On Wed, Apr 06, 2005 at 09:57:00AM -0400, Roger D. Peng wrote:
I think the usual way is to create an R package for yourself and load it when you need it for whatever project. -roger
Alternatively, one can also write the function in question into one's ~/.Rprofile; then, it's automatically available in all R sessions. To avoid confusion, make sure that you choose a unique name, i.e. one that isn't used by any package, if possible. This method should be used only for functions intended to provide some convenience in interactive sessions, code in scripts should not rely on functions being provided by ~/.Rprofile. For scripting, an R package is definitely preferred. Best regards, Jan
Luis Ridao Cruz wrote:
>R-help, > >Sometimes I define functions I wish to have in any R session. >The obvious thing to do is copy-paste the code >The thing is that sometimes I don't know where I have the function >code. > >My question is if somehow I could define a function and "introduce" it >(let's say 'base' package ) so that >could be used anytime I run a different R project. > >Thank you in advance > >______________________________________________ >R-help at 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 >
______________________________________________ R-help at 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
-- +- Jan T. Kim -------------------------------------------------------+ | *NEW* email: jtk at cmp.uea.ac.uk | | *NEW* WWW: http://www.cmp.uea.ac.uk/people/jtk | *-----=< hierarchical systems are for files, not for humans >=-----*
______________________________________________ R-help at 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
-------------------------------------- Don MacQueen Environmental Protection Department Lawrence Livermore National Laboratory Livermore, CA, USA
On Wed, Apr 06, 2005 at 09:57:00AM -0400, Roger D. Peng wrote:
I think the usual way is to create an R package for yourself and load it when you need it for whatever project. -roger
Alternatively, one can also write the function in question into one's ~/.Rprofile; then, it's automatically available in all R sessions. To avoid confusion, make sure that you choose a unique name, i.e. one that isn't used by any package, if possible. This method should be used only for functions intended to provide some convenience in interactive sessions, code in scripts should not rely on functions being provided by ~/.Rprofile. For scripting, an R package is definitely preferred. Best regards, Jan
Luis Ridao Cruz wrote:
R-help, Sometimes I define functions I wish to have in any R session. The obvious thing to do is copy-paste the code The thing is that sometimes I don't know where I have the function code. My question is if somehow I could define a function and "introduce" it (let's say 'base' package ) so that could be used anytime I run a different R project. Thank you in advance
______________________________________________ R-help at 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
______________________________________________ R-help at 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
+- Jan T. Kim -------------------------------------------------------+ | *NEW* email: jtk at cmp.uea.ac.uk | | *NEW* WWW: http://www.cmp.uea.ac.uk/people/jtk | *-----=< hierarchical systems are for files, not for humans >=-----*