Questions tagged [system]
Questions on implementation details and how the parts of Mathematica are arranged or configured to work. Avoid this tag for issues that are confined to a specific operating system.
171
questions
118
votes
1
answer
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Why are numeric division and subtraction not handled better in Mathematica?
There is something that has been troubling me for a while. At least through version 10.0 the performance of a / b and a - b is ...
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80
votes
2
answers
24k
views
Mathematica 10.0.x freezes in Initializing kernels
Bug caused by paclet update and fixed by paclet update.
I updated to Windows 10 and have been running Mathematica fine on it for over a month. For some reason, it has just stopped working. I don't ...
- 1,017
55
votes
1
answer
2k
views
List of Mathematica related acronyms and their real meaning
A few years ago, Wolfram Inc. not only started to rename things around Mathematica, a lot of new technologies and frameworks were introduced as well. Now, we are left with a lot of acronyms and ...
- 112k
53
votes
2
answers
8k
views
What is a "Paclet"?
I often see references to "paclets", for example the PacletManager` context, the PacletInfo.m file in some packages and next to ...
- 231k
52
votes
3
answers
842
views
What bug fixes can be implemented in init.m?
In comments on this question, Mr. Wizard suggested a community wiki to share the bug fixes/workarounds (or possibly other tricks) people load in their init.m. I ...
46
votes
2
answers
2k
views
What are all the "magic" Symbols in the Mathematica language?
Leonid Shifrin once wrote (excerpted):
(Unevaluated) is one of a very few "magic symbols", along with Sequence and <...
- 267k
36
votes
2
answers
14k
views
Mathematica stuck in "running" for every calculation I attempt, kernel error
Bug introduced in 11.1.1 and fixed in 11.1.1
Bug was caused by a paclet update and fixed by a paclet update.
I downloaded Mathematica this morning to do an implicit polar plot. I attempt to run the ...
- 461
34
votes
1
answer
949
views
Paclets updating awareness and tracking
Edit From the author of this question
This question is obsolete
Since 2016 there is a lot of new stuff concerning Paclets.
They are now documented.
End of the Edit
It turns out that some silent ...
- 17.7k
33
votes
2
answers
3k
views
How can I use the Klingon alphabet symbols?
Note: This functionality is presently missing. See: How to add named characters to Mathematica 10?
Mathematica apparently supports the Klingon alphabet:
...
- 267k
30
votes
5
answers
8k
views
Mathematica 11 with High DPI 4k screen
My laptop has a 17 inch 4k screen, running Windows 10 and Ubuntu 1604. Both systems are set to 2x scaling. But Mathematica 11 (released 2016-08-08) is still blurry like version 10. Is there a simple ...
- 561
30
votes
1
answer
3k
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How can I set a keyboard shortcut to run a command?
I want to use this to add a keyboard shortcut to an undo function I wrote. The basic problem is the following:
I have a command, let's say x=1, and I want to run ...
- 1,794
25
votes
0
answers
1k
views
How would I improve this Karaoke machine code?
I was looking at a large collection of Import/Export user suggestions the other day and it dawned on me that we finally have MIDI import in Mathematica 9, which is rather interesting since MIDI ...
- 9,692
24
votes
5
answers
593
views
Is mathematica adequately improving?
A bit of a loaded question, but in your opinion is Wolfram's team making good progress on improving their software?
I've used Mathematica for almost 10 years now, and honestly I'm personally ...
- 840
24
votes
2
answers
662
views
Why doesn't a Composition[] hold its arguments and what can be done about it?
Now that Composition (also RightComposition) has shorthand syntax I am more inclined to use it, however what I feel should be ...
- 267k
22
votes
2
answers
565
views
Second argument of BeginPackage with nested package loading
I naively thought that the second argument of BeginPackage can simply be used to ensure the loading and availability in the ...
- 231k
20
votes
5
answers
3k
views
Which Mathematica files may be deleted to save space
After installation Mathematica 8 for Linux takes more than 3GB in the /usr/local/Wolfram/ directory. I suspect that not all of it is relevant if I want to do some occasional computations. Are there ...
- 1,660
19
votes
4
answers
881
views
Is it important that the front-end has a built-in parser?
The Notebook interface has a parser that seems aware of all operator-precedences, allowing us to step through the expressions (rather: Box-) hierarchy with Ctrl+.
This is extremely convenient, saving ...
- 5,679
18
votes
1
answer
6k
views
How to pause a running evaluation (and continue it later)
Is it possible to pause an already running evaluation that takes a lot of time? And then continue it later?
I can suspend my computer, but that's not what I want. I would like to use my computer in ...
- 405
17
votes
1
answer
526
views
Detect if code is running in the cloud
Wolfram offers several services for running code in the cloud: Mathematica Online, Programming Cloud, CloudEvaluate, etc.
How can a piece of code detect if it is ...
- 231k
16
votes
2
answers
707
views
Detecting kernel initialization
Certain operations do not work during kernel initialization. Code from Kernel/init.m, the Autoload directory, or packages set ...
- 231k
16
votes
1
answer
512
views
How is the mysterious Raw function used?
I have never seen an example use for the mysterious Raw function:
Raw[h, "hexstring"]
constructs a raw data object with head h, and
with contents ...
- 267k
15
votes
1
answer
409
views
Interpretation of the result of ?@
This might be a very trivial question but as a beginner, I don't know the answer. I was exploring ? and after running a cell containing ...
- 1,584
15
votes
1
answer
561
views
Order/Dependency of Styles in a Stylesheet
How exactly is a custom stylesheet processed?
Which style depends on (inherits from) which other style.
Consider e.g. setting a font.
I would expect that setting the font for ...
- 842
15
votes
1
answer
311
views
What are the main differences between RawArray and PackedArray?
What I know:
PackedArray is documented (to some extent) in "Developer Utilities Package", RawArray is just mentioned in ...
- 1,790
14
votes
2
answers
646
views
Front End options
Inspired by a recent question and others like it, and not finding an existing duplicate, I ask:
What is the hierarchy of Front End options?
How do they work?
How can their values be set and recalled?
- 267k
13
votes
8
answers
3k
views
Does Mathematica 11 work on MacOS Sierra?
I'm not sure if I should upgrade, so I wanted to see if anyone has used v11 sucessfully on the newest OSX?
This is the discussion about the same topic on Wolfram Community.
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13
votes
2
answers
1k
views
Giving JLink Huge Memory by Default
I have noticed that Mathematica makes use of Java by way of JLink, for example, in the extensions such as DatabaseLink and (I think) RLink. It also seems like Java is a first-class citizen for writing ...
- 4,326
13
votes
3
answers
894
views
Handling Kernel quit
One can use $Epilog to do something when the Kernel is quit or put an end.m file next to the ...
Kuba♦
- 135k
12
votes
2
answers
282
views
Why are there a lot of input forms in Mathematica?
I'm a novice in using Mathematica.
Please can you explain why there are a lot of input forms in Mathematica such as standard, prefix, postfix and infix?
- 573
12
votes
1
answer
603
views
Handling Kernel start. What is a full initialization stack and what place the Autoload has there?
According to: tutorial/WolframSystemSessions
Initialization
On startup, the Wolfram Language kernel does the following:
Performs license management operations.
Runs Wolfram Language ...
Kuba♦
- 135k
12
votes
1
answer
523
views
Importing parts of Packages
Some programming languages offer the possibility of importing a single function from a library, as in
from x import y
I'm looking to import only one function (<...
- 3,385
12
votes
2
answers
276
views
Why is a symbol still found after changing its context?
It seems that we can change the context of symbols:
In[1]:= x = 1
Out[1]= 1
In[2]:= Context[x] = "foo`";
But then x is still ...
- 231k
12
votes
0
answers
345
views
How can I disable system updates only?
Suppose I'm quite happy with my current Mathematica installation and wish to keep the system in its current form just reliably working.
Since there were already at least two cases[1,2] when a lot of ...
- 61k
11
votes
2
answers
586
views
Catching MachineUnderflow in Version 11.3
Ilian's answer to question 72229, involves
SetSystemOptions["CatchMachineUnderflow" -> False]
Evidently, this worked in earlier versions of Mathematica, but ...
- 60k
11
votes
1
answer
262
views
NotebookEvaluate breaks notebook's context
Bug introduced in 10.4.1 or earlier and persists through 12.0
A support case with the identification [CASE:3813108] was created
[...] I have forwarded an incident report to our developers with the ...
Kuba♦
- 135k
11
votes
1
answer
102
views
Precedence of cell group tokens over package's expressions
Bug introduced in V10.4 or earlier and persisting through V11.3
[CASE:4072996]
...
Kuba♦
- 135k
10
votes
1
answer
14k
views
Is there a system Reset? [duplicate]
Possible Duplicate:
How do I clear all user defined symbols?
The normal way I reset the Mathematica kernel to its initial state is through the notebook interface: ...
- 8,641
10
votes
1
answer
5k
views
What is included in Wolfram Extras?
I recently installed a new version of Mathematica and it includes an optional companion package entitled "Wolfram Extras".
Is there any official documentation (release notes?) that details what ...
- 4,291
10
votes
1
answer
1k
views
What makes a function ticklish?
The Advanced Dynamic Functionality tutorial informally describes a ticklish function as follows:
Every time you evaluate RandomReal[], you get a different answer,...
- 784
9
votes
2
answers
440
views
Clean up list of partial outputs for memory
Context
I run long Mathematica sessions; sometimes I have Output up to Out[3000+]. Hence
I would like to be able to clear out some previous outputs which do use lots of memory.
Attempt
I am aware ...
- 22.4k
9
votes
2
answers
183
views
Problem with LocalSymbol
Bug introduced in 10.2 and fixed in 11.1
I have found that LocalSymbol will sometimes create and store persistent data in a directory different from and off the ...
- 107k
9
votes
1
answer
293
views
Complete list of FrontEndResources
tl;dr
I'm interested in finding a complete list of the strings that can be passed to FrontEndResource (I only need the first string, in the cases where two strings ...
- 46.3k
9
votes
1
answer
1k
views
Is It Safe to Remove the Documentation Notebooks?
I am running Mathematica 10 on linux and noted that the directories containing Mathematica's documentation come to over 3GB.
Am I safe to delete these directories without affecting how Mathematica ...
- 355
9
votes
1
answer
478
views
Raise systemwide keypress event
Is there a way to raise system-wide "keypress" events programmatically from within Mathematica?
Say "Ctrl+C" or "Ctrl+V", which all other programs can recognize?
This is an attempt to gain simple ...
- 2,108
9
votes
1
answer
105
views
8
votes
3
answers
428
views
Hidden Notebooks?
In Mathematica, almost everything is notebook: your "Untitled-1.nb" is a notebook, Help documentation are a series of notebooks, even those windows helping you to draw things or format your notebooks ...
- 9,373
8
votes
1
answer
1k
views
3.4 GHz Ryzen 5 slower to diagonalise large matrix than Intel i5-6300U 2.4 GHz
Sorry that this is quite a specific question but I need to diagonalise large matrices for the problem I'm trying to solve and can't for the life of me work out what's going on:
I was expecting that ...
- 81
8
votes
1
answer
144
views
Exclude inactived functions from DifferentiationOptions
The list of functions provided in SystemOptions["DifferentiationOptions" -> "ExcludedFunctions"] show which symbols will not be touched by ...
- 19.3k
8
votes
0
answers
124
views
Current $Context of a given notebook
nb = CreateDocument[{Dynamic@$Context}, CellContext -> Notebook]
It will show Notebook$$22$93500` or something similar. How ...
Kuba♦
- 135k
8
votes
0
answers
1k
views
How do I determine the Mathematica version without starting the Kernel?
For the Mathematica IntelliJ Plugin, I need to validate if a chosen directory is indeed a Mathematica installation and want to extract its version. The structure of the Mathematica installation is not ...
- 112k