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.
59
questions
118
votes
1
answer
2k
views
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 ...
- 269k
80
votes
2
answers
25k
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
30
votes
1
answer
3k
views
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
15
votes
1
answer
567
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
24
votes
2
answers
667
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 ...
- 269k
12
votes
1
answer
615
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♦
- 136k
14
votes
2
answers
661
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?
- 269k
12
votes
2
answers
611
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 ...
- 60.4k
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
4
votes
2
answers
985
views
Recursion problem
I try to make designation
a = {Subscript[a,1], Subscript[a,2], Subscript[a,3]}
but receive mistake
$RecursionLimit::reclim: Recursion depth of 1024 exceeded.
...
- 573
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 ...
- 232k
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
52
votes
3
answers
844
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 ...
47
votes
3
answers
3k
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 <...
- 269k
34
votes
1
answer
961
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 ...
- 17.8k
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
22
votes
2
answers
577
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 ...
- 232k
9
votes
2
answers
442
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 ...
- 22.5k
7
votes
1
answer
249
views
How does the Kernel know the $Context in a localized notebook
SetOptions[EvaluationNotebook[], CellContext -> Notebook]
$Context
"Notebook$$70$398424`"
And from different ...
Kuba♦
- 136k
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:
...
- 269k
16
votes
2
answers
715
views
Detecting kernel initialization
Certain operations do not work during kernel initialization. Code from Kernel/init.m, the Autoload directory, or packages set ...
- 232k
9
votes
1
answer
308
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 ...
- 46.6k
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
26
votes
6
answers
797
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 ...
- 860
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
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.
- 31k
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 ...
- 4,366
12
votes
2
answers
279
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 ...
- 232k
11
votes
1
answer
268
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♦
- 136k
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 ...
- 4,301
9
votes
2
answers
184
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
7
votes
1
answer
1k
views
CUDALink is not initialized
I've upgraded to Mathematica 9.0 on Ubuntu 12.04 with the latest Nvidia driver (304.64).
I load CUDA by using, as usual, Needs["CUDALink`"].
...
- 71
4
votes
1
answer
240
views
How to checkpoint computations?
Suppose I do some big experiment, presumably in a Table[], or a ParallelTable[]. Experience shows that there is a non-zero ...
- 5,034
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 ...
- 9,741
17
votes
1
answer
530
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 ...
- 232k
16
votes
1
answer
514
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 ...
- 269k
15
votes
1
answer
313
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
13
votes
3
answers
918
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♦
- 136k
12
votes
0
answers
351
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 ...
- 61.3k
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
483
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 ...
- 2,128
8
votes
3
answers
429
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 ...
- 9,403
8
votes
0
answers
97
views
How to trace the stylesheet directives responsible for the selected text's appearance?
By way of example, in a typical Mathematica interactive session, one sees text content as shown below:
Three different text styles can be seen in this figure: input, output, and the style for the <...
- 11.7k
8
votes
0
answers
130
views
Current $Context of a given notebook
nb = CreateDocument[{Dynamic@$Context}, CellContext -> Notebook]
It will show Notebook$$22$93500` or something similar. How ...
Kuba♦
- 136k
7
votes
1
answer
123
views
Get All Discrete Univariate Distributions with Symbolic Parameters
I am trying to get all Discrete Univariate Distributions with symbolic arguments from any place in Wolfram Language system. For example this guide:
http://reference.wolfram.com/language/guide/...
- 70.9k
7
votes
0
answers
121
views
How useful is $SynchronousEvaluation?
Example
SessionSubmit @ Print @ $SynchronousEvaluation
Will print False even though ref/SessionSubmit/Details last point:
...
Kuba♦
- 136k
6
votes
0
answers
139
views
Finish(Asynchronous)Dynamic[]
I have a question deriving from a recent topic Synchronizing Dynamics with EventActions.
tl;dr;
How to authoritatively explain the influence of ...
Kuba♦
- 136k
6
votes
1
answer
136
views
How to work with BoxOptions (ButtonBoxOptions, PanelBoxOptions, etc.)
The main question is in the title. Here are subtopics I'd like to focus on:
Is there a tutorial related to them anywhere in documentation?
How can I check what are current values of e.g. ...
Kuba♦
- 136k
6
votes
2
answers
155
views
Strange behaviour of order of execution or bug?
In[1] and In[3] are identical but the output is different.
- 4,966
3
votes
1
answer
116
views
Automatically load init.m without sharing CellContext
I'm trying to set up Mathematica such that all functions/variables defined in my init.m are automatically loaded into any new notebook I open. This works as a default, but I would also ideally like to ...
- 831