GG 6.0.620-offline (Win10) forgets input lines and definitions

Felix Kasza shared this problem 1 month ago
Solved

The following behaviour is perfetly repeatable on different computers, including ones that I have never touched in my life. GG version: 6.0.620-offline, but 6.0.581 shows the same behaviour.

Ever since GG 6, I have noted its tendency to make input lines in the CAS view disappear, right down the memory hole. Recent (last year) versions, however, have become downright unusable. Here is a nicely repeatable repro scenario:


Snap15.png shows a brand-new session (GG is set to German, so the actual commands were shown with their German names). The session was opened with (hamburger menu) > File > New, and the perspective chosen was CAS. Function g(x) is defined in line 1, and line 2 computes a definite integral over g(x). The result is correct, but I am surprised that the "integral"-command is not displayed with math typesetting. In fact, it is not even capitalized, as GG normally is wont to do.

Snap16.png shows the same, except that I am getting ready to click what I call the "graph me!"-button.

In Snap17.png, the click is done. As usual, GG assigns an arbitrary name to the result, as it is now a graphed object; surprisingly, however, GG recalled itself to a sense of its duty and properly typeset the integral.

Between Snap17.png and Snap18.png, the following things happened:

  1. I typed "h(x):=integral(g(x))" into line 3 (not line 2!) and hit Enter
  2. Line 2, with the definition of "a:=" as the definite integral, disappeared
  3. Line 3 became line 2
  4. "a", apparently still present in the symbol table but now without a definition, was converted to a slider (why? oh, why?)

I can repro this at will on any of the GG6 installations I and the handful of high-schoolers that I tutor have access to. The online versions do not show this behaviour.

Any ideas?

Thanks,

Felix.

Best Answer
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exam mode only exists in Geogebra Classic
Why do you think that? https://www.geogebra.org/m/shfwqcpr

Comments (6)

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Does it work as you want in the new CAS app?https://www.geogebra.org/cas

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Hi Michael,

and thank you for looking at this! Yes, the online CAS app that you linked to works fine.

I then removed both GG CAS and GG 6 Classic from y computer, but I had to manually remove the installation directory; in the same vein I am sure some settings were not removed by the uninstaller since GG remembered that I wanted 5 decimal places by default.

I installed GG 6.0.620-offline Classic and was able to reproduce the behaviour. The online version at https://www.geogebra.org/cl... does the same.

Thanks,

Felix.

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Great, then please just use the newer version https://www.geogebra.org/cas

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Austria has a grammar school/high school exit exam ("Matura") which, I believe, is somewhat like British A-levels and which is a precondition for attending university. The mathematics part is written such that a part pretty much requires the use of a CAS package, and the only ones allowed are the TI-nspire CX CAS in test mode, and of course Geogebra in exam mode. As I understand it, exam mode only exists in Geogebra Classic. No exam mode, no Geogebra.

I would love nothing more than for you to tell me "I tried it, and it's your system that is screwy because it works here." Because if that really is a bug in Geogebra, I need to start yelling at the ministry …

Thanks,

Felix.

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exam mode only exists in Geogebra Classic
Why do you think that? https://www.geogebra.org/m/shfwqcpr

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Thanks! I hadn't realised that the on- and offline versions had slightly different feature sets.

Are there any plans to add Classics probability calculator (distributions, confidence intervals etc.) to the CAS calculator? That would be perfect, because that module is also required for the "Matura" exam.

I appreciate your help (and the enormous amounts of work that Geogebra represents!),

Felix.

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