Sebastian Żurek wrote: > -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA1 > > Thanks for the fast answer, Laurent! > The anonymous function solution is OK, when one needs to work > occasionally with some piece of code. Unfortunately - my problem is a > little bit different: > > I will be given a whole library of custom R functions, I need to access > them with Python, provide some arguments and gather some results. All R > code is maintained by my colleague who is R master and there's no option > he will code R in Python, it's my task to provide R-to-Python > interface, which is a part of a bigger system, which written purely in > Python.
That's a typical use-case for rpy/rpy2, I think. I hope to find the time to write more about that in the near future (and I have to admit that I do not see where the problem is). > Any other suggestion are greatly welcome! > > I'm a R newbie (it's my first hours with this language, though), I guess > one can provide a package (library) of functions and register them in R > namespace - the question is: if I provide such a mechanism with rpy2 > (using the R "library" function) will all the functions became visible > for rpy2? Apparently so. By default R is loading a number of packages (libraries) when you just start it. The documentation has a toy example showing how to check where a symbol is coming from: http://rpy.sourceforge.net/rpy2/doc/html/rinterface.html#r-packages-as-environments Otherwise, the upcoming 2.1 version will be proposing a place where R packages can be given tailored python representations (that's still quite rough, but the earlier people try to break it the better). L. > I'm going to check this in a minute... > > Laurent Gautier pisze: >> Sebastian Żurek wrote: >>> Hi! >>> >>> I want to use rpy2 in my Python software to make a use of some custom >>> R-scripts/functions. >>> >>> Is it possible, to call a custom R function with rpy2? >>> For example, having the custom (taken from R tutorial) definition: >>> >>> twosam <- function(y1, y2) { >>> n1 <- length(y1); n2 <- length(y2) >>> yb1 <- mean(y1); yb2 <- mean(y2) >>> s1 <- var(y1); s2 <- var(y2) >>> s <- ((n1-1)*s1 + (n2-1)*s2)/(n1+n2-2) >>> tst <- (yb1 - yb2)/sqrt(s*(1/n1 + 1/n2)) >>> tst >>> } >>> >>> how to call it with rpy2? I guess, there should be a R-packaged that >>> contains it implemented and loaded? >>> >>> In python code, I want to use something like: >>> >>> twosam = robjects.r['twosam'] >> If you only want to access your function from Python, having making it >> an anonymous R function might one way to go. >> >> twosam = robjects.r(''' >> function(y1, y2) { >> n1 <- length(y1); n2 <- length(y2) >> yb1 <- mean(y1); yb2 <- mean(y2) >> s1 <- var(y1); s2 <- var(y2) >> s <- ((n1-1)*s1 + (n2-1)*s2)/(n1+n2-2) >> tst <- (yb1 - yb2)/sqrt(s*(1/n1 + 1/n2)) >> tst >> } >> ''') >> >> >> >> twosam(robjects.IntVector(range(10)), >> robjects.IntVector(range(10))) >> >> >> >> L. >> >> >>> Thanks for *any* clues! >>> Sebastian >>> >>> ------------------------------------------------------------------------------ >>> Are you an open source citizen? Join us for the Open Source Bridge >>> conference! >>> Portland, OR, June 17-19. Two days of sessions, one day of unconference: >>> $250. >>> Need another reason to go? 24-hour hacker lounge. Register today! >>> http://ad.doubleclick.net/clk;215844324;13503038;v?http://opensourcebridge.org >>> _______________________________________________ >>> rpy-list mailing list >>> rpy-list@lists.sourceforge.net >>> https://lists.sourceforge.net/lists/listinfo/rpy-list >> >> ------------------------------------------------------------------------------ >> Are you an open source citizen? Join us for the Open Source Bridge >> conference! >> Portland, OR, June 17-19. Two days of sessions, one day of unconference: >> $250. >> Need another reason to go? 24-hour hacker lounge. Register today! >> http://ad.doubleclick.net/clk;215844324;13503038;v?http://opensourcebridge.org >> _______________________________________________ >> rpy-list mailing list >> rpy-list@lists.sourceforge.net >> https://lists.sourceforge.net/lists/listinfo/rpy-list > > -----BEGIN PGP SIGNATURE----- > Version: GnuPG v2.0.11 (GNU/Linux) > Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org > > iEYEARECAAYFAkpBHXEACgkQGAS1N8/5iJ54YQCfTdmCeOtaLdyM81YN3I5r+qrB > XzwAn1TTB7vVOymt2imTbq0bY9APsTEa > =Mrnm > -----END PGP SIGNATURE----- > > > ------------------------------------------------------------------------------ > _______________________________________________ > rpy-list mailing list > rpy-list@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/rpy-list ------------------------------------------------------------------------------ _______________________________________________ rpy-list mailing list rpy-list@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/rpy-list
