[Rd] mb_m buffer not cleared if parseEval fails
Hi,
I am using RInside for one of the applications that I'm using. The error
that occured is as follows.
When I use R.parseEval("xyz") if the parse fails then the mb_m is not
cleared and hence all subsequent
calls to R.parseEval fail.
example:
when R.parseEval("stringConcatfactoryrandom") is executed the R instance
looks like this
(gdb) p R
$7 = (RInside &) @0x7fff13d42d10: {mb_m = {buffer =
"stringConcatfactoryrandom"}, global_env = , verbose_m
= false, static instance_ = 0x7fff13d42d10}
since there's no function called stringConcatfactoryrandom in my R code,
the above call fails. The I use the same R instance to call
R.parseEval("exists")and I get this
(gdb) p R
$8 = (RInside &) @0x7fff13d42d10: {mb_m = {buffer =
"stringConcatfactoryrandomexists"}, global_env = ,
verbose_m = false, static instance_ = 0x7fff13d42d10}
I think the buffer should be cleared after each call to parseEval
Thanks
Pratibha
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Re: [Rd] mb_m buffer not cleared if parseEval fails
Hi Pratibha,
May I suggest to move this over to the rcpp-devel list (where you need to be
subscribed to post)? I am setting an appropriate Reply-To: now, we should
then also remove the CC for r-devel.
On 1 March 2012 at 11:05, Pratibha Rana wrote:
| Hi,
|
| I am using RInside for one of the applications that I'm using. The error
| that occured is as follows.
|
| When I use R.parseEval("xyz") if the parse fails then the mb_m is not
| cleared and hence all subsequent
| calls to R.parseEval fail.
|
| example:
|
| when R.parseEval("stringConcatfactoryrandom") is executed the R instance
| looks like this
| (gdb) p R
| $7 = (RInside &) @0x7fff13d42d10: {mb_m = {buffer =
| "stringConcatfactoryrandom"}, global_env = , verbose_m
| = false, static instance_ = 0x7fff13d42d10}
|
| since there's no function called stringConcatfactoryrandom in my R code,
| the above call fails. The I use the same R instance to call
|
We could do with a try/catch logic here. You can either (easiest) wrap your
actual expression in a try() [ or tryCatch() ] and then submit the new
compound expression.
Or we tackle this at the C++ and add a try/catch layer in the member function
RInside::parseEval() --- which never had one as I started with the code from
littler which, being C, never had this type of exception handling.
I do not have to implement this, or try it, but if you get a chance I'd love
to hear how it goes.
| R.parseEval("exists")and I get this
|
| (gdb) p R
| $8 = (RInside &) @0x7fff13d42d10: {mb_m = {buffer =
| "stringConcatfactoryrandomexists"}, global_env = ,
| verbose_m = false, static instance_ = 0x7fff13d42d10}
|
| I think the buffer should be cleared after each call to parseEval
Other approaches may work too. What you suggest would just ignore the error
and carry on. That may work too, but there is something about this I don't
quite like...
Cheers, Dirk
| Thanks
| Pratibha
|
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| https://stat.ethz.ch/mailman/listinfo/r-devel
--
"Outside of a dog, a book is a man's best friend. Inside of a dog, it is too
dark to read." -- Groucho Marx
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[Rd] Julia
My purpose in mentioning the Julia language (julialang.org) here is not to start a flame war. I find it to be a very interesting development and others who read this list may want to read about it too. It is still very much early days for this language - about the same stage as R was in 1995 or 1996 when only a few people knew about it - but Julia holds much potential. There is a thread about "R and statistical programming" on groups.google.com/group/julia-dev. As always happens, there is a certain amount of grumbling of the "R IS S SLW" flavor but there is also some good discussion regarding features of R (well, S actually) that are central to the language. (Disclaimer: I am one of the participants discussing the importance of data frames and formulas in R.) If you want to know why Julia has attracted a lot of interest very recently (like in the last 10 days), as a language it uses multiple dispatch (like S4 methods) with methods being compiled on the fly using the LLVM (http://llvm.org) infrastructure. In some ways it achieves the Holy Grail of languages like R, Matlab, NumPy, ... in that it combines the speed of compiled languages with the flexibility of the high-level interpreted language. One of the developers, Jeff Bezanson, gave a seminar about the design of the language at Stanford yesterday, and the video is archived at http://www.stanford.edu/class/ee380/. You don't see John Chambers on camera but I am reasonably certain that a couple of the questions and comments came from him. __ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
Re: [Rd] Julia
Doug, Agreed on the interesting point - looks like it has some real promise. I think the spike in interest could be attributable to Mike Loukides's tweet on Feb 20. (editor at O'Reilly) https://twitter.com/#!/mikeloukides/status/171773229407551488 That is exactly the moment I stumbled upon it. Jeff On Thu, Mar 1, 2012 at 11:06 AM, Douglas Bates wrote: > My purpose in mentioning the Julia language (julialang.org) here is > not to start a flame war. I find it to be a very interesting > development and others who read this list may want to read about it > too. > > It is still very much early days for this language - about the same > stage as R was in 1995 or 1996 when only a few people knew about it - > but Julia holds much potential. There is a thread about "R and > statistical programming" on groups.google.com/group/julia-dev. As > always happens, there is a certain amount of grumbling of the "R IS > S SLW" flavor but there is also some good discussion regarding > features of R (well, S actually) that are central to the language. > (Disclaimer: I am one of the participants discussing the importance of > data frames and formulas in R.) > > If you want to know why Julia has attracted a lot of interest very > recently (like in the last 10 days), as a language it uses multiple > dispatch (like S4 methods) with methods being compiled on the fly > using the LLVM (http://llvm.org) infrastructure. In some ways it > achieves the Holy Grail of languages like R, Matlab, NumPy, ... in > that it combines the speed of compiled languages with the flexibility > of the high-level interpreted language. > > One of the developers, Jeff Bezanson, gave a seminar about the design > of the language at Stanford yesterday, and the video is archived at > http://www.stanford.edu/class/ee380/. You don't see John Chambers on > camera but I am reasonably certain that a couple of the questions and > comments came from him. > > __ > R-devel@r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-devel -- Jeffrey Ryan jeffrey.r...@lemnica.com www.lemnica.com www.esotericR.com R/Finance 2012: Applied Finance with R www.RinFinance.com See you in Chicago __ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
Re: [Rd] Julia
On Thu, Mar 1, 2012 at 11:20 AM, Jeffrey Ryan wrote: > Doug, > > Agreed on the interesting point - looks like it has some real promise. > I think the spike in interest could be attributable to Mike > Loukides's tweet on Feb 20. (editor at O'Reilly) > > https://twitter.com/#!/mikeloukides/status/171773229407551488 > > That is exactly the moment I stumbled upon it. I think Jeff Bezanson attributes the interest to a blog posting by Viral Shah, another member of the development team, that hit Reddit. He said that, with Viral now in India, it all happened overnight for those in North America and he awoke the next day to find a firestorm of interest. I ran across Julia in the Release Notes of LLVM and mentioned it to Dirk Eddelbuettel who posted about it on Google+ in January. (Dirk, being much younger than I, knows about these new-fangled social media things and I don't.) __ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
Re: [Rd] missing value break my if clause and crash my program
On 29.02.2012 13:36, zisheng xing wrote: I have a program which is designed to read through a dbf file and carry out certain amount of further calculation if one condition obtained from the newly read line. The condition to determine if the calculation can be done is a if-clasue (i.e. if(m>0). Unfortunately, when m is missing, the program crashed. Just wonder who can help me out. 1. Please ask questions on R-help after reading its posting guide. R-devel is for development purposes. 2. Your code results in an ERROR rather than a crash. 3. Check if m exists before you compare it to some value. Uwe Ligges Thanks [[alternative HTML version deleted]] __ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel __ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
Re: [Rd] improved error message when existing implicit S4 generic is not imported?
Hi, On 02/27/2012 12:22 AM, Prof Brian Ripley wrote: ... (Re another message: stats4 *is* "methodsGenerics" for base packages.) Why isn't it called base4 if it's for "base" packages? Thanks, H. -- Hervé Pagès Program in Computational Biology Division of Public Health Sciences Fred Hutchinson Cancer Research Center 1100 Fairview Ave. N, M1-B514 P.O. Box 19024 Seattle, WA 98109-1024 E-mail: hpa...@fhcrc.org Phone: (206) 667-5791 Fax:(206) 667-1319 __ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
Re: [Rd] Julia
Can somebody postb a link to the video? I cant find it, searching "Julia" on youtube stanford channel gives nothing. Kjetil On Thu, Mar 1, 2012 at 11:37 AM, Douglas Bates wrote: > On Thu, Mar 1, 2012 at 11:20 AM, Jeffrey Ryan > wrote: >> Doug, >> >> Agreed on the interesting point - looks like it has some real promise. >> I think the spike in interest could be attributable to Mike >> Loukides's tweet on Feb 20. (editor at O'Reilly) >> >> https://twitter.com/#!/mikeloukides/status/171773229407551488 >> >> That is exactly the moment I stumbled upon it. > > I think Jeff Bezanson attributes the interest to a blog posting by > Viral Shah, another member of the development team, that hit Reddit. > He said that, with Viral now in India, it all happened overnight for > those in North America and he awoke the next day to find a firestorm > of interest. I ran across Julia in the Release Notes of LLVM and > mentioned it to Dirk Eddelbuettel who posted about it on Google+ in > January. (Dirk, being much younger than I, knows about these > new-fangled social media things and I don't.) > > __ > R-devel@r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-devel __ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
Re: [Rd] Julia
http://julialang.org/blog Then click on "Stanford Talk Video". Then click on "available here". Ted. On 01-Mar-2012 Kjetil Halvorsen wrote: > Can somebody postb a link to the video? I cant find it, searching > "Julia" on youtube stanford channel gives nothing. > > Kjetil > > On Thu, Mar 1, 2012 at 11:37 AM, Douglas Bates wrote: >> On Thu, Mar 1, 2012 at 11:20 AM, Jeffrey Ryan >> wrote: >>> Doug, >>> >>> Agreed on the interesting point - looks like it has some real promise. >>> Â_I think the spike in interest could be attributable to Mike >>> Loukides's tweet on Feb 20. (editor at O'Reilly) >>> >>> https://twitter.com/#!/mikeloukides/status/171773229407551488 >>> >>> That is exactly the moment I stumbled upon it. >> >> I think Jeff Bezanson attributes the interest to a blog posting by >> Viral Shah, another member of the development team, that hit Reddit. >> He said that, with Viral now in India, it all happened overnight for >> those in North America and he awoke the next day to find a firestorm >> of interest. Â_I ran across Julia in the Release Notes of LLVM and >> mentioned it to Dirk Eddelbuettel who posted about it on Google+ in >> January. Â_(Dirk, being much younger than I, knows about these >> new-fangled social media things and I don't.) >> >> __ >> R-devel@r-project.org mailing list >> https://stat.ethz.ch/mailman/listinfo/r-devel > > __ > R-devel@r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-devel - E-Mail: (Ted Harding) Date: 01-Mar-2012 Time: 20:47:42 This message was sent by XFMail __ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
