Re: [Rd] Computer algebra in R - would that be an idea??

2005-07-17 Thread Ayal Pinkus
Hi, sorry, I should have given the link below. You can get the latest version of Yacas from: http://sourceforge.net/cvs/?group_id=2528 I just checked in the change to the API. Best wishes, Ayal __ R-devel@r-project.org mailing list https://stat

Re: [Rd] Computer algebra in R - would that be an idea??

2005-07-17 Thread Ayal Pinkus
I took the liberty of already adding the API to compose Yacas expression trees, executing them, and pulling them apart. This is just a preliminary stab at it, we can change it of course (removing void* for something else say). It was relatively little work. You can get it from our cvs tree

Re: [Rd] Computer algebra in R - would that be an idea??

2005-07-17 Thread Ayal Pinkus
> where they are listed down the left hand side of the page. JGR, > and possibly > several others on the list, are written in Java. R can also be > accessed > directly online at: > http://www.math.montana.edu/Rweb/ > and other sites. > And as of a week ago or so Yacas can also be accesse

Re: [Rd] Computer algebra in R - would that be an idea??

2005-07-17 Thread Ayal Pinkus
Hi, > > R builds fine under Windows (though you need to pay attention to > the details > which are in the (binary) distribution in the pdf files, in > particular: `R > Installation and Administration Manual', a html copy is also on the > website; > and the README* and INSTALL files in src/

Re: [Rd] Computer algebra in R - would that be an idea??

2005-07-17 Thread Ayal Pinkus
Hi, > > This looks promising. Thanks for starting it off > and being so enthusiastic. > It does sound like a fun thing, and I think this will be very little work for me. > Taking a look at the APIs for Perl, Python, R, Tcl, Java, etc. > would also be good. One thing that all of these provide

Re: [Rd] Computer algebra in R - would that be an idea??

2005-07-17 Thread Ayal Pinkus
I forgot one API call, getting a potential error caused through evaluating the object. And I forgot one argument needed for evaluating, the pointer to the environment. Ayal On Jul 17, 2005, at 5:29 PM, Ayal Pinkus wrote: > > Hi, > > >> >> The thing that I wonde

Re: [Rd] Computer algebra in R - would that be an idea??

2005-07-17 Thread Ayal Pinkus
Hi, > > The thing that I wonder is whether it would be possible to embed Yacas > at a lower level than via the parser. E.g. the Tcl embedding has > Tcl_EvalObjEx() and friends, which operate on preparsed Tcl objects. > Using this instead of Tcl_Eval() gives some efficiency gain, but more > import

Re: [Rd] Computer algebra in R - would that be an idea??

2005-07-17 Thread Ayal Pinkus
Hi, I am the maintainer of Yacas. I decided to join this mailing list after having heard that the option of linking R to Yacas was being discussed. Please don't hesitate to ask if you have questions, I will try to find the time to help. Ayal On Jul 17, 2005, at 8:11 AM, simon blomberg wrote