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Apr
21
revised Mathematica Precisions vs Doubles in C/C++
added 4 characters in body
Apr
21
answered Mathematica Precisions vs Doubles in C/C++
Apr
21
comment Proving that Reverse[Reverse[x]]]=x
@QuantumDot Well, it can be inactivated, but Mathematica still doesn't have any functionality to prove things about how code runs, and I think Reverse is still meant to be a programming construct and not meant to represent maths ...
Apr
21
comment Solving pure functions
Please reformulate the question a bit more concisely, like this: "I tried this code. I expected this output. I got that output instead."
Apr
21
comment Solving pure functions
I don't understand what your question is ...
Apr
21
answered Proving that Reverse[Reverse[x]]]=x
Apr
21
revised How can I get osx split screen to work
added 207 characters in body
Apr
21
comment FindRoot does not find any roots of a black box function
The function you posted simply doesn't work. Please fix the problems with it and make sure that something like solution[0.969, 0.1, 1] evaluates without errors. Also, try to avoid names like rjet$ or rjet$0 because they may conflict with the builtin localization mechanisms. Don't use a $ in a symbol name except as the first character.
Apr
21
revised How can I get osx split screen to work
added 8 characters in body
Apr
21
comment How to clean up temporary files when the kernel exits?
Yes, it's pretty much the same thing. The problem with both is that if the package doesn't already have a MathLink or LibraryLink components then it is just too much trouble to add one and compile for all platforms ... With LibraryLink it is easier to automate compilation, but a working C compiler is still needed and won't typically be present on Windows.
Apr
21
comment How to clean up temporary files when the kernel exits?
Thanks! I was also thinking of doing something like 2., but instead of a MathLink program it is also possible to use a LibraryLink library (and put the cleanup code in WolframLibrary_uninitialize. Would it at all help if I sent an email to support and suggested to add a reliable builtin cleanup mechanism?
Apr
21
comment How to fix an error of Graphics`Graphics` is now obsolete?
Wrap the Plot[...] command in a Print[...]. community.wolfram.com/groups/-/m/t/430019?p_p_auth=C9N2m9PO
Apr
21
answered How can I get osx split screen to work
Apr
21
awarded  graphics3d
Apr
20
comment How to plot a solution set?
Oh, now I understand. I don't think this is possible purely with plotting functions (though I might always be wrong). I would use FindRoot to solve the equations then plot the result using ParametricPlot3D.
Apr
20
comment How to plot a solution set?
I'm not sure I understand your question. Are you asking how to solve equations? Are you asking how to plot the obtained solutions? Can you show what you did so far and at which point you got stuck? Are you asking for symbolic (i.e. not numeric) solutions? If yes, why do you think it is possible at all and what do your equations look like?
Apr
20
comment Mathematica Precisions vs Doubles in C/C++
Can you give example matrices?
Apr
20
revised Mathematica Precisions vs Doubles in C/C++
deleted 13 characters in body
Apr
20
comment Mathematica Precisions vs Doubles in C/C++
But generally I would trust the values that agree with Mathematica's high precision result.
Apr
20
comment Mathematica Precisions vs Doubles in C/C++
"and test these results against the same computation carried out by a C program" <- There are different ways to compute eigenvalues, and they may give different results in precision-sensitive situations. What does your C program do exactly? Mathematica can also use different algorithms and unfortunately not all of these are fully documented.