Re: [R] Were to find appropriate functions for a given task in R
you may find RSiteSearch() and help.search() functions useful for this purpose, considering usually different key words for the same topic. 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://www.med.kuleuven.be/biostat/ http://www.student.kuleuven.be/~m0390867/dimitris.htm - Original Message - From: Albert Sorribas [EMAIL PROTECTED] To: r-help@stat.math.ethz.ch Sent: Wednesday, April 26, 2006 5:31 PM Subject: [R] Were to find appropriate functions for a given task in R This is a generic request concerning were to look for finding appropriate information on a precise procedure in R. I'm using R for teaching introductory statistics and my students are learning how to deal with it. However, I find it difficult to locate some of the procedures. For instance, for basic crosstabulation, it is obvious that basic functions as table, ftable, and prop.table can be used. But there is a CrossTable function that is very useful. This is hidden in gmodels and gregmisc, as far as I've been able to explore the packages. However, there is no way (unless I sit down to r-help for hours) to be sure if there is some other place in which a very useful function is hidden for table manipulation (for instance controlling for other variables). This is only an example. But there are many more. Were to look for CI for proportions? I can find it but it is not easy. I understand R is more appropriate for difficult statistical procedures (glm and similar), BUT students need to start somewhere.. My specific claim is about the need for a sort of guide in which the different procedures could be classified (and some redundancies could be deleted...by the way). Is there something similar around? Any project working on this? Any clue for? If not, I would suggest starting some kind of easy reference based on the problem to solve. This could indicate were to look for. Last day I find in package vcd that a function exist for testing the goodness-of-fit of a sample to binomial and other distributions..but this was VERY difficult to locate. Any way, as usual, any indication will be very useful (spaecially for my students!!!) Albert Sorribas Professor of Statistics and Operational Research Departament de Ciències Mèdiques Bàsiques Universitat de Lleida Montserrat Roig 2 25008-Lleida (Espanya) web.udl.es/Biomath/Group [[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 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
Re: [R] Were to find appropriate functions for a given task in R
1. Check out the R reference card at http://www.rpad.org/Rpad/Rpad-refcard.pdf . There are also several others available from the CRAN website. 2. Check out TINN-R, a Windows text/R code editor that integrates the above and provides function tips inline to give the syntax of many R functions. 3. ?help.search 4. ?RSiteSearch (or search CRAN directly using Jon Baron's search engine). These do not eliminate the problem, but hopefully mitigate it. Given that there are several thousand R functions spread among hundreds of packages at at least three separate repositories (CRAN, BioConductor, and Omegahat), it's clearly a nontrivial issue. But that's why Google and other search services are multibillion dollar companies. HTH Cheers, Bert -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Albert Sorribas Sent: Wednesday, April 26, 2006 8:32 AM To: r-help@stat.math.ethz.ch Subject: [R] Were to find appropriate functions for a given task in R This is a generic request concerning were to look for finding appropriate information on a precise procedure in R. Im using R for teaching introductory statistics and my students are learning how to deal with it. However, I find it difficult to locate some of the procedures. For instance, for basic crosstabulation, it is obvious that basic functions as table, ftable, and prop.table can be used. But there is a CrossTable function that is very useful. This is hidden in gmodels and gregmisc, as far as Ive been able to explore the packages. However, there is no way (unless I sit down to r-help for hours) to be sure if there is some other place in which a very useful function is hidden for table manipulation (for instance controlling for other variables). This is only an example. But there are many more. Were to look for CI for proportions? I can find it but it is not easy. I understand R is more appropriate for difficult statistical procedures (glm and similar), BUT students need to start somewhere. My specific claim is about the need for a sort of guide in which the different procedures could be classified (and some redundancies could be deleted..by the way). Is there something similar around? Any project working on this? Any clue for? If not, I would suggest starting some kind of easy reference based on the problem to solve. This could indicate were to look for. Last day I find in package vcd that a function exist for testing the goodness-of-fit of a sample to binomial and other distributions.but this was VERY difficult to locate. Any way, as usual, any indication will be very useful (spaecially for my students!!!) Albert Sorribas Professor of Statistics and Operational Research Departament de Cihncies Mhdiques B`siques Universitat de Lleida Montserrat Roig 2 25008-Lleida (Espanya) web.udl.es/Biomath/Group [[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
Re: [R] Were to find appropriate functions for a given task in R
There is a reference sheet here: http://www.rpad.org/Rpad/R-refcard.pdf a function finder here: http://biostat.mc.vanderbilt.edu/s/finder/find.html and task views here: http://cran.r-project.org/src/contrib/Views/ Also use of RSiteSearch and help.search from within R can be helpful. On 4/26/06, Albert Sorribas [EMAIL PROTECTED] wrote: This is a generic request concerning were to look for finding appropriate information on a precise procedure in R. I'm using R for teaching introductory statistics and my students are learning how to deal with it. However, I find it difficult to locate some of the procedures. For instance, for basic crosstabulation, it is obvious that basic functions as table, ftable, and prop.table can be used. But there is a CrossTable function that is very useful. This is hidden in gmodels and gregmisc, as far as I've been able to explore the packages. However, there is no way (unless I sit down to r-help for hours) to be sure if there is some other place in which a very useful function is hidden for table manipulation (for instance controlling for other variables). This is only an example. But there are many more. Were to look for CI for proportions? I can find it but it is not easy. I understand R is more appropriate for difficult statistical procedures (glm and similar), BUT students need to start somewhere…. My specific claim is about the need for a sort of guide in which the different procedures could be classified (and some redundancies could be deleted…..by the way). Is there something similar around? Any project working on this? Any clue for? If not, I would suggest starting some kind of easy reference based on the problem to solve. This could indicate were to look for. Last day I find in package vcd that a function exist for testing the goodness-of-fit of a sample to binomial and other distributions….but this was VERY difficult to locate. Any way, as usual, any indication will be very useful (spaecially for my students!!!) Albert Sorribas Professor of Statistics and Operational Research Departament de Ciències Mèdiques Bàsiques Universitat de Lleida Montserrat Roig 2 25008-Lleida (Espanya) web.udl.es/Biomath/Group [[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 __ 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
Re: [R] Were to find appropriate functions for a given task in R
Thanks for the indications. All these suggestion will help a lot. The TINN-R application is impressive. However, I think something more PROBLEM directed is needed. I agree that Google and the ?RSiteSearch helps a lot, but yet the explanations (like this discussion) are not clear enough in many cases. Any way, this is my impression as a technical user. The R stuff is really good, but it is difficult to find what you need in many instances. Then, people tend to define its own functions (I'm doing this too), and a lack of standardization makes it difficult to keep everything into control. Albert Sorribas Professor of Statistics and Operational Research Departament de Ciències Mèdiques Bàsiques Universitat de Lleida Montserrat Roig 2 25008-Lleida (Espanya) web.udl.es/Biomath/Group -Mensaje original- De: Gabor Grothendieck [mailto:[EMAIL PROTECTED] Enviado el: miércoles, 26 de abril de 2006 17:47 Para: Albert Sorribas CC: r-help@stat.math.ethz.ch Asunto: Re: [R] Were to find appropriate functions for a given task in R There is a reference sheet here: http://www.rpad.org/Rpad/R-refcard.pdf a function finder here: http://biostat.mc.vanderbilt.edu/s/finder/find.html and task views here: http://cran.r-project.org/src/contrib/Views/ Also use of RSiteSearch and help.search from within R can be helpful. On 4/26/06, Albert Sorribas [EMAIL PROTECTED] wrote: This is a generic request concerning were to look for finding appropriate information on a precise procedure in R. I'm using R for teaching introductory statistics and my students are learning how to deal with it. However, I find it difficult to locate some of the procedures. For instance, for basic crosstabulation, it is obvious that basic functions as table, ftable, and prop.table can be used. But there is a CrossTable function that is very useful. This is hidden in gmodels and gregmisc, as far as I've been able to explore the packages. However, there is no way (unless I sit down to r-help for hours) to be sure if there is some other place in which a very useful function is hidden for table manipulation (for instance controlling for other variables). This is only an example. But there are many more. Were to look for CI for proportions? I can find it but it is not easy. I understand R is more appropriate for difficult statistical procedures (glm and similar), BUT students need to start somewhere . My specific claim is about the need for a sort of guide in which the different procedures could be classified (and some redundancies could be deleted ..by the way). Is there something similar around? Any project working on this? Any clue for? If not, I would suggest starting some kind of easy reference based on the problem to solve. This could indicate were to look for. Last day I find in package vcd that a function exist for testing the goodness-of-fit of a sample to binomial and other distributions .but this was VERY difficult to locate. Any way, as usual, any indication will be very useful (spaecially for my students!!!) Albert Sorribas Professor of Statistics and Operational Research Departament de Ciències Mèdiques Bàsiques Universitat de Lleida Montserrat Roig 2 25008-Lleida (Espanya) web.udl.es/Biomath/Group [[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 __ 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
Re: [R] Were to find appropriate functions for a given task in R
Hi Albert, Maybe you can summarize what you find during your teaching and put them on one website. Everyone gives a piece of firewood, then we can build up a strong fire. Thanks Xiaohua On 4/26/06, Albert Sorribas [EMAIL PROTECTED] wrote: Thanks for the indications. All these suggestion will help a lot. The TINN-R application is impressive. However, I think something more PROBLEM directed is needed. I agree that Google and the ?RSiteSearch helps a lot, but yet the explanations (like this discussion) are not clear enough in many cases. Any way, this is my impression as a technical user. The R stuff is really good, but it is difficult to find what you need in many instances. Then, people tend to define its own functions (I'm doing this too), and a lack of standardization makes it difficult to keep everything into control. Albert Sorribas Professor of Statistics and Operational Research Departament de Ciències Mèdiques Bàsiques Universitat de Lleida Montserrat Roig 2 25008-Lleida (Espanya) web.udl.es/Biomath/Group -Mensaje original- De: Gabor Grothendieck [mailto:[EMAIL PROTECTED] Enviado el: miércoles, 26 de abril de 2006 17:47 Para: Albert Sorribas CC: r-help@stat.math.ethz.ch Asunto: Re: [R] Were to find appropriate functions for a given task in R There is a reference sheet here: http://www.rpad.org/Rpad/R-refcard.pdf a function finder here: http://biostat.mc.vanderbilt.edu/s/finder/find.html and task views here: http://cran.r-project.org/src/contrib/Views/ Also use of RSiteSearch and help.search from within R can be helpful. On 4/26/06, Albert Sorribas [EMAIL PROTECTED] wrote: This is a generic request concerning were to look for finding appropriate information on a precise procedure in R. I'm using R for teaching introductory statistics and my students are learning how to deal with it. However, I find it difficult to locate some of the procedures. For instance, for basic crosstabulation, it is obvious that basic functions as table, ftable, and prop.table can be used. But there is a CrossTable function that is very useful. This is hidden in gmodels and gregmisc, as far as I've been able to explore the packages. However, there is no way (unless I sit down to r-help for hours) to be sure if there is some other place in which a very useful function is hidden for table manipulation (for instance controlling for other variables). This is only an example. But there are many more. Were to look for CI for proportions? I can find it but it is not easy. I understand R is more appropriate for difficult statistical procedures (glm and similar), BUT students need to start somewhere . My specific claim is about the need for a sort of guide in which the different procedures could be classified (and some redundancies could be deleted ..by the way). Is there something similar around? Any project working on this? Any clue for? If not, I would suggest starting some kind of easy reference based on the problem to solve. This could indicate were to look for. Last day I find in package vcd that a function exist for testing the goodness-of-fit of a sample to binomial and other distributions .but this was VERY difficult to locate. Any way, as usual, any indication will be very useful (spaecially for my students!!!) Albert Sorribas Professor of Statistics and Operational Research Departament de Ciències Mèdiques Bàsiques Universitat de Lleida Montserrat Roig 2 25008-Lleida (Espanya) web.udl.es/Biomath/Group [[alternative HTML version deleted]] [[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
Re: [R] Were to find appropriate functions for a given task in R
Then, people tend to define its own functions (I'm doing this too), and a lack of standardization makes it difficult to keep everything into control. If you think of R as more of a language rather than a pre-packaged statistical program, I feel that helps. In the C++ world, there are people all over writing classes and functions, and many of these have close or duplicate functionality. As a programmer, you can decide which one to use for your needs, or program your own, or extend someone else's, the choice is yours. The same in the R world, you have choices, and there does not have to be necessarily only method to do each task. I don't feel there needs to be 'control', everyone can implement what they want. If you think of R only as a prepacked statistical program however, I can see getting frustrated that there are usually many ways to do the same thing. R is much more than this though. That's how I see it anyway. __ 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
