Re: [R] About source()
Thanks, guys! I am using Rscript at the moment and will definitely try littler. Li Sun 2012/1/4 Rainer M Krug : > -BEGIN PGP SIGNED MESSAGE- > Hash: SHA1 > > On 04/01/12 10:39, Uwe Ligges wrote: >> >> >> On 03.01.2012 21:22, Li SUN wrote: >>> Thanks, Rolf, Justin and Uwe! >>> >>> Actually I wanted to run .R file as a script, just like what >>> people do for bash scripts or python scripts. It seems to me that >>> adding "#!/usr/bin/R -f" at the first line is what I need. Is >>> this true? >> >> >> Perhaps even "Rscript" rather than "R". > > And there is also littler from Dirk Eddelbüttel: > > http://dirk.eddelbuettel.com/code/littler.html > > - From the description: "littler provides hash-bang (i.e. script > starting with #!/some/path) capability for GNU R, as well as simple > command-line and piping use." > > Similar to Rscript, but with some differences. > > I used both, and in most cases they are equivalent. > > > Rainer > > >> >> Uwe Ligges >> >>> Li Sun >>> >>> >>> 2012/1/2 Rolf Turner: On 03/01/12 17:02, Li SUN wrote: > > Hello, > > I am a beginner to the R language and find it fantastic and > well-designed, quite different from other programming > languages. What a refreshingly sensible attitude!!! :-) > This is the first time I post on the r-help mailing list. > > In invoking the function source(filename), it seems that the > filename has to exist in the current working directory, > otherwise it has to be specified in full path. So is there > any mechanism(such as environment variable) to specify an > additional directory of .R files that source() could search > in? I'm no expert on this, and others may correct me, but (1) I don't believe any such mechanism exists. (2) It's probably not a good idea, even if such a mechanism were to exist. Directories have a tree structure, rather than being linearly ordered in the way that data bases on your R search path are ordered. I believe you would run all sorts of risks of confusion and of getting the wrong file were you to invoke such a mechanism. It is ``good practice'' to have separate directories associated with different projects and to situate all files, that you might wish to source in respect of a given project, in the directory associated with that project. I know that this is an irritating sort of response --- ``No, you can't do that, and you shouldn't do it anyway!'' --- but I sincerely believe this to be true. That being said, I also believe that you could program up such a mechanism yourself. I.e. build a function "source2()" which would have a "hard coded" list of directories to search, and would make use of the "try()" function. Might be a good exercise for you, given that you are starting out in R and looking to upgrade your skills! :-) cheers, Rolf Turner >>> >>> __ >>> 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 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. > > > - -- > Rainer M. Krug, PhD (Conservation Ecology, SUN), MSc (Conservation > Biology, UCT), Dipl. Phys. (Germany) > > Centre of Excellence for Invasion Biology > Stellenbosch University > South Africa > > Tel : +33 - (0)9 53 10 27 44 > Cell: +33 - (0)6 85 62 59 98 > Fax : +33 - (0)9 58 10 27 44 > > Fax (D): +49 - (0)3 21 21 25 22 44 > > email: rai...@krugs.de > > Skype: RMkrug > -BEGIN PGP SIGNATURE- > Version: GnuPG v1.4.11 (GNU/Linux) > Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ > > iEYEARECAAYFAk8EIs4ACgkQoYgNqgF2egpF+QCeObN8q+U6HHlM/Tsls/wF+VoH > /twAn2zaTzVrCdTxvENSK2buPlFsjlnC > =tEkV > -END PGP SIGNATURE- __ 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.
Re: [R] About source()
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 On 04/01/12 10:39, Uwe Ligges wrote: > > > On 03.01.2012 21:22, Li SUN wrote: >> Thanks, Rolf, Justin and Uwe! >> >> Actually I wanted to run .R file as a script, just like what >> people do for bash scripts or python scripts. It seems to me that >> adding "#!/usr/bin/R -f" at the first line is what I need. Is >> this true? > > > Perhaps even "Rscript" rather than "R". And there is also littler from Dirk Eddelbüttel: http://dirk.eddelbuettel.com/code/littler.html - From the description: "littler provides hash-bang (i.e. script starting with #!/some/path) capability for GNU R, as well as simple command-line and piping use." Similar to Rscript, but with some differences. I used both, and in most cases they are equivalent. Rainer > > Uwe Ligges > >> Li Sun >> >> >> 2012/1/2 Rolf Turner: >>> On 03/01/12 17:02, Li SUN wrote: Hello, I am a beginner to the R language and find it fantastic and well-designed, quite different from other programming languages. >>> >>> What a refreshingly sensible attitude!!! :-) >>> This is the first time I post on the r-help mailing list. In invoking the function source(filename), it seems that the filename has to exist in the current working directory, otherwise it has to be specified in full path. So is there any mechanism(such as environment variable) to specify an additional directory of .R files that source() could search in? >>> >>> >>> I'm no expert on this, and others may correct me, but >>> >>> (1) I don't believe any such mechanism exists. >>> >>> (2) It's probably not a good idea, even if such a mechanism >>> were to exist. Directories have a tree structure, rather than >>> being linearly ordered in the way that data bases on your R >>> search path are ordered. >>> >>> I believe you would run all sorts of risks of confusion and of >>> getting the wrong file were you to invoke such a mechanism. >>> >>> It is ``good practice'' to have separate directories >>> associated with different projects and to situate all files, >>> that you might wish to source in respect of a given project, in >>> the directory associated with that project. >>> >>> I know that this is an irritating sort of response --- ``No, >>> you can't do that, and you shouldn't do it anyway!'' --- but I >>> sincerely believe this to be true. >>> >>> That being said, I also believe that you could program up such >>> a mechanism yourself. I.e. build a function "source2()" which >>> would have a "hard coded" list of directories to search, and >>> would make use of the "try()" function. >>> >>> Might be a good exercise for you, given that you are starting >>> out in R and looking to upgrade your skills! :-) >>> >>> cheers, >>> >>> Rolf Turner >>> >>> >> >> __ >> 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 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. - -- Rainer M. Krug, PhD (Conservation Ecology, SUN), MSc (Conservation Biology, UCT), Dipl. Phys. (Germany) Centre of Excellence for Invasion Biology Stellenbosch University South Africa Tel : +33 - (0)9 53 10 27 44 Cell: +33 - (0)6 85 62 59 98 Fax : +33 - (0)9 58 10 27 44 Fax (D):+49 - (0)3 21 21 25 22 44 email: rai...@krugs.de Skype: RMkrug -BEGIN PGP SIGNATURE- Version: GnuPG v1.4.11 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iEYEARECAAYFAk8EIs4ACgkQoYgNqgF2egpF+QCeObN8q+U6HHlM/Tsls/wF+VoH /twAn2zaTzVrCdTxvENSK2buPlFsjlnC =tEkV -END PGP SIGNATURE- __ 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.
Re: [R] About source()
On 03.01.2012 21:22, Li SUN wrote: Thanks, Rolf, Justin and Uwe! Actually I wanted to run .R file as a script, just like what people do for bash scripts or python scripts. It seems to me that adding "#!/usr/bin/R -f" at the first line is what I need. Is this true? Perhaps even "Rscript" rather than "R". Uwe Ligges Li Sun 2012/1/2 Rolf Turner: On 03/01/12 17:02, Li SUN wrote: Hello, I am a beginner to the R language and find it fantastic and well-designed, quite different from other programming languages. What a refreshingly sensible attitude!!! :-) This is the first time I post on the r-help mailing list. In invoking the function source(filename), it seems that the filename has to exist in the current working directory, otherwise it has to be specified in full path. So is there any mechanism(such as environment variable) to specify an additional directory of .R files that source() could search in? I'm no expert on this, and others may correct me, but (1) I don't believe any such mechanism exists. (2) It's probably not a good idea, even if such a mechanism were to exist. Directories have a tree structure, rather than being linearly ordered in the way that data bases on your R search path are ordered. I believe you would run all sorts of risks of confusion and of getting the wrong file were you to invoke such a mechanism. It is ``good practice'' to have separate directories associated with different projects and to situate all files, that you might wish to source in respect of a given project, in the directory associated with that project. I know that this is an irritating sort of response --- ``No, you can't do that, and you shouldn't do it anyway!'' --- but I sincerely believe this to be true. That being said, I also believe that you could program up such a mechanism yourself. I.e. build a function "source2()" which would have a "hard coded" list of directories to search, and would make use of the "try()" function. Might be a good exercise for you, given that you are starting out in R and looking to upgrade your skills! :-) cheers, Rolf Turner __ 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 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] About source()
Thanks, Rolf, Justin and Uwe! Actually I wanted to run .R file as a script, just like what people do for bash scripts or python scripts. It seems to me that adding "#!/usr/bin/R -f" at the first line is what I need. Is this true? Li Sun 2012/1/2 Rolf Turner : > On 03/01/12 17:02, Li SUN wrote: >> >> Hello, >> >> I am a beginner to the R language and find it fantastic and >> well-designed, quite different from other programming languages. > > What a refreshingly sensible attitude!!! :-) > >> This is the first time I post on the r-help mailing list. >> >> In invoking the function source(filename), it seems that the filename >> has to exist in the current working directory, otherwise it has to be >> specified in full path. So is there any mechanism(such as environment >> variable) to specify an additional directory of .R files that source() >> could search in? > > > I'm no expert on this, and others may correct me, but > > (1) I don't believe any such mechanism exists. > > (2) It's probably not a good idea, even if such a mechanism > were to exist. Directories have a tree structure, rather than > being linearly ordered in the way that data bases on your > R search path are ordered. > > I believe you would run all sorts of risks of confusion and > of getting the wrong file were you to invoke such a mechanism. > > It is ``good practice'' to have separate directories associated > with different projects and to situate all files, that you might wish > to source in respect of a given project, in the directory associated > with that project. > > I know that this is an irritating sort of response --- ``No, you can't > do that, and you shouldn't do it anyway!'' --- but I sincerely believe > this to be true. > > That being said, I also believe that you could program up such a mechanism > yourself. I.e. build a function "source2()" which would have a "hard coded" > list > of directories to search, and would make use of the "try()" function. > > Might be a good exercise for you, given that you are starting out in R > and looking to upgrade your skills! :-) > > cheers, > > Rolf Turner > > __ 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.
Re: [R] About source()
On 03.01.2012 07:50, Rolf Turner wrote: On 03/01/12 17:02, Li SUN wrote: Hello, I am a beginner to the R language and find it fantastic and well-designed, quite different from other programming languages. What a refreshingly sensible attitude!!! :-) This is the first time I post on the r-help mailing list. In invoking the function source(filename), it seems that the filename has to exist in the current working directory, otherwise it has to be specified in full path. No: relative (to the working directory) specifications are possible as well. Uwe Ligges So is there any mechanism(such as environment variable) to specify an additional directory of .R files that source() could search in? I'm no expert on this, and others may correct me, but (1) I don't believe any such mechanism exists. (2) It's probably not a good idea, even if such a mechanism were to exist. Directories have a tree structure, rather than being linearly ordered in the way that data bases on your R search path are ordered. I believe you would run all sorts of risks of confusion and of getting the wrong file were you to invoke such a mechanism. It is ``good practice'' to have separate directories associated with different projects and to situate all files, that you might wish to source in respect of a given project, in the directory associated with that project. I know that this is an irritating sort of response --- ``No, you can't do that, and you shouldn't do it anyway!'' --- but I sincerely believe this to be true. That being said, I also believe that you could program up such a mechanism yourself. I.e. build a function "source2()" which would have a "hard coded" list of directories to search, and would make use of the "try()" function. Might be a good exercise for you, given that you are starting out in R and looking to upgrade your skills! :-) cheers, Rolf Turner __ 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 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] About source()
On 03/01/12 17:02, Li SUN wrote: Hello, I am a beginner to the R language and find it fantastic and well-designed, quite different from other programming languages. What a refreshingly sensible attitude!!! :-) This is the first time I post on the r-help mailing list. In invoking the function source(filename), it seems that the filename has to exist in the current working directory, otherwise it has to be specified in full path. So is there any mechanism(such as environment variable) to specify an additional directory of .R files that source() could search in? I'm no expert on this, and others may correct me, but (1) I don't believe any such mechanism exists. (2) It's probably not a good idea, even if such a mechanism were to exist. Directories have a tree structure, rather than being linearly ordered in the way that data bases on your R search path are ordered. I believe you would run all sorts of risks of confusion and of getting the wrong file were you to invoke such a mechanism. It is ``good practice'' to have separate directories associated with different projects and to situate all files, that you might wish to source in respect of a given project, in the directory associated with that project. I know that this is an irritating sort of response --- ``No, you can't do that, and you shouldn't do it anyway!'' --- but I sincerely believe this to be true. That being said, I also believe that you could program up such a mechanism yourself. I.e. build a function "source2()" which would have a "hard coded" list of directories to search, and would make use of the "try()" function. Might be a good exercise for you, given that you are starting out in R and looking to upgrade your skills! :-) cheers, Rolf Turner __ 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.
