I run the windows version of Mathematica 9. Indeed, when I start a fresh notebook and test e.g. the F1 functionality, it works. But I said that I have a lot of notebooks in which this, and other handy tools, do not work. All these notebooks contain a lot of interactivity. So the problem is notebook dependent, probably in relation with the dynamics. As Leigh Pascoe made a similar remark.
With respect to Murray's last question: all errors had to do with Dynamic showing incorrect inconsistent results.
Finally: though I personally do not need the new functions in Mathematica 9, I can very well imagine that they are useful to others. I was not proposing that WRI should not look for improved functionality.
Op 18-5-2013 8:40, Murray Eisenberg schreef: > Responses interspersed below. > > On May 17, 2013, at 4:35 AM, Fred Simons <email@example.com> wrote: > >> Mathematica 9 is very unstable. For me it is the poorest version that I >> have used since the frontend was added. In many of my notebooks, I >> cannot use simple commands like selecting a name and pressing shift-F1 >> for going to the help, or ctrl( for converting a selection to a >> mathematica formula. The result is that I get the message Mathematica 9 >> stopped working. > That's odd! In 9.0.1 under OS X, fn F1 does bring up the ref page on a function if the cursor is immediately after the name or if the name is selected. > > And if in a Text cell I type, say a+b, select it, and press Ctrl(, then it does become a math formula. > >> Last Tuesday I gave a course on interactivity in Mathematica. >> Mathematica 9 was running on 7 platforms. On at least 5 of them >> Mathematica had to be restarted during the course because of it started >> showing incorrect output. When things like this happen, I cannot >> recommend Mathematica to a potential new user. > I think we would all like to know just what sort of input was giving such problems, and on exactly which OS platforms. > > --- > Murray Eisenberg firstname.lastname@example.org > Mathematics & Statistics Dept. > Lederle Graduate Research Tower phone 413 549-1020 (H) > University of Massachusetts 413 545-2838 (W) > 710 North Pleasant Street fax 413 545-1801 > Amherst, MA 01003-9305 > > > > > > > > > ----- > Geen virus gevonden in dit bericht. > Gecontroleerd door AVG - www.avg.com > Versie: 2013.0.3336 / Virusdatabase: 3162/6334 - datum van uitgifte: 05/17/13 > > . >