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Re: Undo/Redo
Posted:
May 4, 2011 5:55 AM


Personally, I don't lose useful code, in the way you seem to do.
Maybe you need to cultivate strategies that prevent it for yourself, rather than waiting for Wolfram to develop undo/redo capabilities.
You'd be waiting a LONG time, after all, even if they got seriously interested.
Bobby
On Tue, 03 May 2011 07:22:03 0500, =A6er=FDch Jakub <Serych@panska.cz> wrote:
> You are right, that undo/redo in Mathematica could be much more > complicated than in for example text editor. But undo/redo is not > the question of inversion of mathematical operations, but simply of > conservating the state of the computer before each operation and simple > returning that state back when undo/redo is needed. > > Do you thing, that it is simple for example to return operation in > Photoshop, when I'm editing nearly 1GB large image (in the area of the > 360 deg. panoramas, I'm playing with, it is not an unusual size)? > > And Photoshop has not only perfectly working undo/redo (like many other > programs) but even very mature history tools, which can do much more > with the deep history of operations. Many of such image operations are > also pretty difficult and ireversibile mathematical algorithms. > > So I realy don't understand, why undo/redo in Mathematica is so poor. > > Jakub > >> Original Message >> From: Bill Rowe [mailto:readnews@sbcglobal.net] >> Sent: Sunday, May 01, 2011 12:23 PM >> To: mathgroup@smc.vnet.net >> Subject: Re: Undo/Redo >> >> On 4/30/11 at 5:53 AM, baraksh@gmail.com (Barak Shoshany) wrote: >> >> >This seems to be a recurring subject in this group. >> >> >Mathematica is now at version 8 and there's still no multiple undo >> >and redo functionality. I don't understand how such an amazing piece >> >of software can lack such a trivial feature. Why isn't Woflram doing >> >anything about it? Heck, I'll even write the code for undo/redo >> >myself for them for free if they let me. Is there someone at Wolfram >> >I can complain on the matter? Perhaps an internet petition is in >> >order? What do you think? >> >> Simply put, implementation of undo/redo for something like >> Mathematica is far more complex than you suggest. >> >> Undo/redo in a text editor or word processor is manipulating >> what I will call static text, i.e., text that is to be >> read/printed etc that does not change the state of your machine, >> it not executed. This isn't the case for Mathematica. >> >> You really need to think about what you mean by say undo in the >> context of Mathematica. What does it mean to undo a computation? >> Keep in mind, many mathematical operations have no simple inverse. >> >> Reverting the state of a text document to a previous state is >> quite simple compared to doing the same for a Mathematica session. >
 DrMajorBob@yahoo.com



