All Questions
13,257
questions with no upvoted or accepted answers
53
votes
1
answer
1k
views
Hyperlinks not preserved when saving in PDF format in MMA V10
Bug introduced in 10.0 or earlier and fixed in 11.0.0
I usually create my course contracts in Mathematica and then save them in PDF format. The notebooks include hyperlinks and these have ...
- 2,508
47
votes
0
answers
2k
views
Fast Spherical Harmonics radiative transfer
This is a rather specific question and I apologize for spamming you with some lengthy code. But it could be interesting for some reader and maybe you can help out, so please bear with me.
I am using ...
- 7,663
43
votes
0
answers
1k
views
Performance problems in new Sequence functions
The new-in-10.1 Sequence* family of functions should provide newly optimized methods for handling sequence problems. Happily in some cases they do! For example ...
- 269k
42
votes
0
answers
822
views
Front end goes wild with named slots
Bug introduced in 10 and fixed in 12.1
Assume the following simple expression
{#"Test"}&
Now go in front of the #...
- 112k
37
votes
0
answers
1k
views
Changing FrontEnd automatic scrolling in version 8
In Mathematica versions < 8, the FrontEnd has a very intelligent behavior:
On evaluation, it by default automatically scrolls down the Notebook window to the last printed Output cell but also ...
- 61.3k
34
votes
0
answers
758
views
How to design CloudObjects with reasonable CloudCredit costs
Note: I originally thought to post this as a non-answer/extended comment to this question; however I feared that I would end up hijacking the original question. It is likely a duplicate with the ...
- 19.6k
34
votes
1
answer
746
views
Benchmarking: unexplained switching between high and low performance
tl;dr I am trying to accurately benchmark some vectorized operations, and compare them between systems. But benchmarking is hard to do well, and I am getting inconsistent results: performance is ...
- 232k
27
votes
0
answers
2k
views
Nonlinear least squares on a GPU with Mathematica 9
Update: A Mathematica wrapper for (https://github.com/zitmen/cuLM) should allow for us to directly implement the Levenberg-Marquardt algorithm in CUDA for nonlinear least squares fitting.
In a ...
- 761
26
votes
0
answers
1k
views
ListContourPlot and ListContourPlot3D use better interpolation for arrays of values than for lists of tuples (i.e. {{x,y,z,f[x,y,z]}..}
From reading the documentation, it seems that ListContourPlot3D should work equally well on an array versus a list of tuples,
?ListContourPlot3D
...
- 67k
26
votes
0
answers
529
views
Compile not correctly initializing a variable defined inside Module
Bug introduced in 8.0, fixed in 10.4, intentionally reintroduced in 11.0 and persisting through 13.0.0 or later
In the following example, inside the minimumX's <...
- 6,635
26
votes
0
answers
1k
views
Kinect on Mathematica
I saw on the internet a lot of nice experiments with Microsoft Kinect. I just bought one and would like to know if someone here has been able to use it with Mathematica.
The main idea is to been able ...
- 26k
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
25
votes
1
answer
637
views
LibraryLink: What can we do with MInputStream and MOutputStream?
Version 9 introduced the WolframStreamsLibrary.h header for LibraryLink. It contains MInputStream and ...
- 232k
24
votes
0
answers
1k
views
Mathematica vs. state-of-the-art SAT solvers
I found some fascinating paper by Marijn Heule and Oliver Kullmann on advances in SAT solvers and automated reasoning. In particular, the authors where able to show (a year earlier) a breakthrough ...
- 2,122
24
votes
0
answers
1k
views
How to use Charting`ScaledTicks?
I found several topics about undocumented ScaledTicks function and tried to use this. Here is the first example:
...
- 3,592
23
votes
0
answers
405
views
Breaking change of Total in Mathematica 12.0?
Total has been changed in Mathematica 12.0. The documentation seems to contradict itself.
In one line it states:
Total[ $f[ e_1,e_2,...]$ ] gives the sum of the $e_i$ for any head $f$
In the next ...
- 943
23
votes
0
answers
339
views
What has changed in pattern matching functions with the Orderless attribute?
Bug introduced in 10.1 and fixed in 11.0(.1)
In making an attempt to answer this question, we ran into a version-dependent pattern-matching issue. An extended discussion in the comments transpired, ...
- 22.7k
23
votes
0
answers
1k
views
LinearSolve and Krylov Method options
I need to solve a large, sparse, linear system. At some point Method -> "Multifrontal" fails and a bit later also "Pardiso" ...
- 7,043
22
votes
0
answers
841
views
How to ImageRestyle high-res images?
I’m running v12 now and ImageRestyle[] crashes for me on an image of size 1600 x 1200 pixels.
All the examples in the documentation use images around 500 x 500 or ...
- 31k
22
votes
0
answers
587
views
Calling Sage functions from Mathematica
I recently found a very useful open-source math software called Sage, which provides many useful functions lacking in Mathematica. Since I'm more used to the Mathematica language instead of the ...
- 867
21
votes
0
answers
674
views
Implementing Contextual Bandits
The multi-armed bandit problem (MAB) is a classic in Reinforcement learning. Now that Mathematica version 12 finally has support for Reinforcement learning:
Here's a nice "mnist example" for training ...
- 31k
21
votes
0
answers
400
views
Internal`Bag memory usage
1. How does Internal`Bag handle memory inside a compiled function? (examples below)
2. Is there a way to explicitly free up memory used by ...
- 5,404
21
votes
0
answers
2k
views
Convert Mathematica graphics to TikZ?
Is there a package to convert Mathematica graphics to TikZ code (for inclusion in LaTeX source files)?
Such a package, dated 2016-01-30, is described at http://library.wolfram.com/infocenter/...
- 11.7k
20
votes
0
answers
336
views
Changes to Coefficient function in v10.2
In the version Mathemaica 10.4, I am very surprised that the core function Coefficient has changed, e.g.,
...
- 1,227
20
votes
0
answers
219
views
Status of all Evaluators?
Since I have 4 cores on my machine I typically have 4 notebooks open each with their own kernel evaluator. I'd like to construct a dynamic pane similar to the parallel kernels status window:
But that ...
- 31k
20
votes
0
answers
251
views
Inconsistent handling of Dynamic option values; intended, omission, or bug?
In answering Dynamic ClipPlanes calculated from current ViewPoint Kuba and I got into a brief exchange regarding how Option values wrapped in Dynamic should be ...
- 269k
20
votes
0
answers
480
views
Bug with Tooltip and ListPointPlot3D
Bug introduced in 10.0.0 and persisting through 11.2.0. Fixed in 11.3.
The coordinates of a point in a three dimensional graph can be shown in a tooltip:
...
- 10.1k
20
votes
1
answer
563
views
How to connect to an already running interactive Python session?
As Mathematica has the interoperability with Python since M11.2, with major improvements in M12.0, is it possible to connect to already running interactive Python sessions? For example, can we connect ...
- 4,317
19
votes
0
answers
234
views
Why the Callout option makes plotting performance poor
Bug introduced in 11.0 and fixed in 11.1
The Callout option is a new option for plotting, but the performance is very poor, see bellow testing case.
...
- 2,399
19
votes
0
answers
1k
views
Find the Panda and the Cat - Dudolf puzzle
I recently find this puzzle where you have to find the panda from a group of snowmen. Having a horrible eyesight I have to take help of mathematica to find it.
I start with assumption that all ...
- 15.8k
19
votes
0
answers
269
views
Current (e.g., ca. 2016 / MMa 10 / WP 4+) best practices for embedding interactive content in WordPress?
My strategy, in the past, has been to embed interactive CDF files into my WordPress blog for student's to use (Much like the Wolfram Demonstration Project).
As many know 1) the 'Plug in' ...
- 1,800
19
votes
0
answers
2k
views
Using TetGen in Mathematica to get 3D Voronoi diagram
In this post, the use of TetGen for 3D Voronoi tesselation has been briefly discussed. However there is still no info about the use of TetGen to generate a 3D Voronoi diagram. The TetGen documentation ...
- 2,841
19
votes
0
answers
1k
views
How to protect existing MathLink connection from disconnecting
I am developing an application that consists of a Mathematica package and an external Java program. The purpose of the application is to read streamed data from a port and update a variable in the ...
- 191
18
votes
0
answers
261
views
New Needs alias - How to make autocomplete works
Mathematica 13 has a cool new feature for Needs. Now it's possible to use alias:
Here is a simple doc example:
The problem is, the autocomplete do not work for ...
- 26k
18
votes
0
answers
300
views
How to design re-usable sub-modules?
There was a recent question asking about how to design modular packages:
Declaring Package with dependencies in multiples files?
This is an important issue for which unfortunately there is no One ...
- 232k
18
votes
0
answers
495
views
Where are my Cloud Credits going?
In less than a month I've used 5k cloud credits (half of my quota) and all I did was deploying a bunch of static notebooks with ...
- 8,059
18
votes
0
answers
425
views
Strategies to find curves on messy data using FindCurvePath
I have a set of data points that correspond to roots of a transcendental equation with respect to a parameter (the abscissa) which, by the properties of the system, define continuous curves (might be ...
- 1,599
18
votes
0
answers
623
views
C Code generated from Mathematica not working?
I am a .Net developer. I'm trying to build a Visual C++ application using C code generated from Mathematica (by another person). I don't have Mathematica installed on my machine. When I try to compile ...
- 181
17
votes
0
answers
582
views
Neural Network Automatic Differentiation ("Autograd")
Automatic differentiation methods in general have been the topic of past questions, but this is specifically about automatic differentiation of neural networks.
The motivation is an old but useful ...
- 2,855
17
votes
1
answer
2k
views
From where to learn finite element method?
Can anyone reccomend me a book or site for learning finite element method with mathematica, besides wolfram language official site,
https://reference.wolfram.com/language/FEMDocumentation/tutorial/...
- 423
17
votes
0
answers
304
views
GridGraph[{6,6,6}] crashes—can you reproduce this?
Bug introduced in 11.3 and fixed in 12.0
Occasionally, I see a kernel crash with GridGraph[{6,6,6}]. It is not easy to trigger. Sometimes it may require as many ...
- 232k
17
votes
0
answers
209
views
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 ...
- 269k
17
votes
0
answers
639
views
Mathematica HPC on AWS vs. Azure
I am looking for advice on deploying Mathematica for HPC in an on-demand cloud environment. I occasionally have Mathematica projects that require parallel computing and large amounts of RAM. These ...
- 893
17
votes
0
answers
185
views
Issue with undo after copying a string inside a string
Bug introduced in 10.0 and persisting through V11.3
Here's a small but annoying issue related to undo and copying of strings.
Steps required to get the problem:
Type ...
Kuba♦
- 136k
17
votes
0
answers
486
views
Strange behaviour of integrals with Cos, Sin, and Exp
Bug introduced in 8.0.4 or earlier and persisting through 13.2.0
During the study of the problem How to solve this integration? I have discovered a strange behaviour of some integrals.
I would ...
17
votes
0
answers
2k
views
Circle with negative radius?
Bug introduced in 9.0 or earlier and fixed in 11.0.0
Why does this work:
Graphics[{Circle[{0, 0}, -Pi/4]}]
But this doesn't?
...
- 14.8k
17
votes
0
answers
258
views
Why does the FrontEnd lose matching of parentheses when we insert quotations?
Bug introduced in V10.0 and resolved in V11.3
(These are guesses. It is likely to have been resolved in an earlier version V11.X, but V11.3 is what I have access to.)
I am running Mathematica 10.0....
- 22.7k
17
votes
0
answers
256
views
Is Mathematica 10 color managed?
With ColorProfileData Mathematica 10 can handle device-dependent color spaces. However images with embedded color profiles, e.g. ...
- 1,245
17
votes
0
answers
4k
views
Threads vs Cores: How many kernels need to launch in parallel Mathematica?
I have a dual-core intel machine. I would like to test how many parallel local kernels should be launch to get the optimized performance. Knowing that the HyperThreading technology of Intel could run ...
- 1,751
17
votes
0
answers
240
views
Is there a convenient/automatic way of uploading a notebook into SE?
This post discusses how to streamline the other way - extracting code from a fragmented and longish SE answer but I imagine a two-way workflow like:
Fashion an answer/question in an SE-templated ...
- 6,046