search for: mstli

On Sun, 19 Jan 2025, Ivo Welch wrote: > Hi Duncan ? Wonderful. Thank you. Bug or no bug, I think it would be > a huge improvement for user-friendliness if R printed the last line by > default *every time* a script dies. Most computer languages do so. > > Should I file it as a request for improvement to the R code > development team? Maybe R can be improved at a very low cost

Thanks for pointing out the options. Using options(show.error.locations = TRUE) works on Ivo's example, but it doesn't show a location if the error happens in a function that doesn't have srcrefs, because the known location isn't on the top of the stack. Perhaps TRUE (and maybe "top"?) should look back through the stack until it finds a known location, and

I've posted a patch to bugs.r-project.org that fixes the traceback() issue. It's not specific to findFun3; you get the same problem with errors from expressions like 1 + "a" In my testing, I occasionally saw cases where show.error.locations = TRUE didn't work. I'll try to track down a reproducible case, and perhaps a patch to fix it. Duncan Murdoch On

Sorry, I'm not seeing the first problem now: options(show.error.locations = TRUE) works fine. Not sure what I did wrong before. I'm still seeing `traceback()` failing to report the attempt to call nofunction(). I suppose this is because a context is never set up for the failed call. Perhaps findFun3 could set up a fake context so that traceback() adds one more entry? Duncan

Hi, As a next question to my building this server. I'm nogt able to get a full verbose dmesg. Probably because the kernelbuffer for it is too small. I know there used to be a kernel option to increase it. But I can not find it with the setting in NOTES or any other place I looked.... Is it still there? Thanx, --WjW

understood. but, please, consider not people like me but unwary beginners and students of R. I have used R now for decades, and even I am baffled by it. Couldn't you make R code easier to debug not only for people like me (who can indeed tweak their environments) but also for novice users? On Sun, Jan 19, 2025 at 8:46?AM <luke-tierney at uiowa.edu> wrote: > > On Sun, 19 Jan

And now I've found the elusive bug in show.error.locations = TRUE as well, and posted a patch for that too. Back to the original topic of this thread: I think most users should routinely use options(show.error.locations = TRUE) e.g. in their .Rprofile. That will often speed up bug fixes, especially if my patch is incorporated. Duncan Murdoch On 2025-01-20 5:56 p.m., Duncan Murdoch

Arguably, R was not designed or evolved for truly novice users, nor really was Python or just about all computer languages. As they evolved and became in many ways more powerful, they tended to get ever less user friendly in the way you are asking for and gotten so bloated that many features are not familiar even to expert users. Compiled languages can have ways to keep track of what LINE of code

I have a 64-bit windows box - Intel Xeon CPU E7340 @ 2.4GHz 31.9GB of RAM I have R 2.11.1 (64bit) running on it. My csv data is 3.6 GB (with about 15 million obs, 120 variables.) ------------------------------------------------ I have successfully imported the data above into R. No problem. Now I am trying to run 'rpart' on my data. But I got the following error : Error: cannot

Avi, Yes, R (really S) was not designed for novice users but rather for experts. For better or worse it has evolved into a programming language used by tyros, and experts. Debugging tools should be easy to use, generally known, and helpful for tyro and expert. It would certainly help if R reported the line number, or the code, that generated the error. John John David Sorkin M.D., Ph.D.

Hi Duncan ? Wonderful. Thank you. Bug or no bug, I think it would be a huge improvement for user-friendliness if R printed the last line by default *every time* a script dies. Most computer languages do so. Should I file it as a request for improvement to the R code development team? Maybe R can be improved at a very low cost to the development team and a very high benefit to newbies.