Questions tagged [undocumented]
Questions on undocumented functionality of Mathematica. Note that such functions might be subject to change without notice in future versions.
329
questions
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Internal`MRealToString Gives Scientific Output From Large Inputs. How To Stop This?
The undocumented Internal`MRealToString works just fine for reals up to 999999. For anything over it outputs scientific notation. I don't need scientific, I need simple decimal.
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214
votes
26
answers
18k
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What are some useful, undocumented Mathematica functions?
There have already been some questions about some undocumented functionality in Mathematica. Such as (please add to these lists!)
How can one find undocumented options or option values in Mathematica?...
1
vote
1
answer
213
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Log scale for ListContourPlot when the axes have different orders of magnitude
I am trying to plot a data set (download here) in Mathematica (it's 3.9 MB and I wasn't sure how to best share it) which I then want to visualize with ...
0
votes
1
answer
98
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Question about System`MeijerGDump`* [closed]
Steps
Start a fresh kernel, then copy the below sentence, run it.
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11
votes
2
answers
224
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Which functions use a given option?
I occasionally discover Options which look like they might be useful, if only I knew which functions used that option. Is there a resource that lists all the functions which use a given option? What ...
4
votes
1
answer
118
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How to remove only circular refs in Language`ExpressionStore
Expressions are not garbage collected if there are references to them stored in the expression store. I use the following internal functions:
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27
votes
0
answers
2k
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How to use Charting`ScaledTicks?
I found several topics about the undocumented ScaledTicks function and tried to use this. Here is the first example:
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3
votes
1
answer
239
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A question related to the usage of LegendLayout -> {"Row", 1}
I saw this piece of code from an answer by @Syed here.
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5
votes
1
answer
81
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Undocumented behavior of Fold for arbitrary heads [closed]
Edit: I'm apparently blind. Sorry! And thanks to those who answered anyway.
Apologies in advance if this is sort of a nitpicky question, but I'm generally very paranoid that I don't fully understand ...
5
votes
1
answer
146
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What is computed by LinearAlgebra`Private`MatrixConditionNumber?
The following returns 51/7, even though the condition number is actually 9. I'm curious, what does 51/7 correspond to for this matrix?
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47
votes
2
answers
2k
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How to work with Experimental`NumericalFunction?
This question is intimately connected with previous one: "How to create internally optimized expression for computing with high WorkingPrecision?"
Oleksandr R. correctly states in the comment:
A ...
6
votes
2
answers
234
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Graphics`Mesh`FindIntersections not working in Mathematica 13.3
I just updated my Mathematica for Windows to 13.3 and when I tried to use the "Graphics MeshFindIntersections" command it doesn't seem to work. Have they replaced it with some other command ...
3
votes
0
answers
60
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Explanation for certain options of `SolveAlways`?
As one can see,
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21
votes
1
answer
286
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Why are delayed definitions in scoping functions not documented?
As outlined here, := may be used in scoping constructs like With to give delayed definitions, but this is undocumented.
This ...
3
votes
2
answers
204
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Meaning of arguments in FittedModels`ParameterEllipsoid
I am trying to figure out what FittedModels`ParameterEllipsoid's parameters mean (I want to construct a filled ellipse)
Here is a minimum working example:
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