10
votes
0answers
155 views

Autocomplete of non-global functions

In Mathematica 9 and 10 they added autocompletion. Out of the box this works great, but when I set the CellContext to "Notebook" ...
10
votes
0answers
202 views

Check whether a working CCompiler is installed

Let me give a bit background: As many of my answers imply, I often use the auto-parallelization (meaning, that Mathematica distributes the calculation automatically over several cores when list-...
10
votes
0answers
451 views

How does Mathematica find a series expansion of expressions containing logarithms when there is a singularity at the expansion point?

I am looking for a good approximation to a function containing logarithms, especially at values close to zero. When I used Mathematica's Series command I found ...
10
votes
0answers
275 views

Setting non-standard ImageResolution for EMF export as default

Mathematica has a bug in that BarCharts and ListPlots with Filling will export as a ...
10
votes
0answers
584 views

Compile recursive function modifying global variables

How to compile recursive formula when it relies on more than a few global variables (global to the topmost compiled function)? It is unreasonable to pass on all such variables to each recursive ...
10
votes
0answers
2k views

Download Mathematica 8 Trial

My school uses mathematica 8 on several of their computers. I would like to download a trail version for my home computer. I would like the same version. Is there a place I can download mathematica ...
10
votes
0answers
571 views

More efficient matrix-vector product

Dear mathematica users, In my present research I am faced with a real dense $n\times n$ matrix $A$ where $n \geq 3000$ (hopefully even more). The coefficients of this matrix are fixed, but I will ...
10
votes
0answers
189 views

HorizontalGauge causes problem with ScalingFunctions -> “Log”

I am trying to use HorizontalGauge[Dynamic[expt], {0.1, 100}, ScalingFunctions -> "Log"], i.e. a gauge with a logarithmic scale. This creates an error, a graph ...
10
votes
0answers
224 views

Break[] inside ColorFunction

f[x_?NumericQ]:= (Do[Break[],{i,1,2}];x) Plot[x,{x,0,1},ColorFunction->(ColorData["Rainbow"][f[#]]&)] Break::nofwd: No enclosing For, While, or Do found ...
10
votes
0answers
127 views

Using citations with Workbench

I have written a tutorial (.nb file) for a package using Workbench. In the tutorial there are some citations created with the recently introduced citation management system. They are simply numbered ...
10
votes
0answers
458 views

How to copy hyperlink addresses using the keyboard

I would like to copy the address of a hyperlink in Mathematica using the keyboard. I found code for copying hyperlink addresses in ContextMenus.tr: ...
9
votes
0answers
53 views

Issue with undo after copying a string inside a string

Bug introduced in 10.0 and persisting through 10.4.1 or later Here's a small but annoying issue related to undo and copying of strings. Steps required to get the problem: Type ...
9
votes
0answers
109 views

Why would killing the kernel defreeze/unhang the front end?

My Mathematica front end will freeze occasionally for unreproducible reasons. This seems mostly associated with long (> 1 hour) computations, although not exclusively. If I click on the Mathematica ...
9
votes
0answers
57 views

CopyToClipboard freezes FrontEnd

This is freezing the FrontEnd: CopyToClipboard@ExampleData[{"Text", "AeneidEnglish"}] Are there system limits I'm hitting here?
9
votes
0answers
119 views

Is there a linter to help write good Mathematica code?

I don't do much real programming, but I've recently been turned on to Atom, which has linter plugins for over 50 languages to make coding easier (most drawing on pre-existing lint-like programs). In ...
9
votes
0answers
107 views

Is this a bug in DiscretizeRegion in 10.4?

Bug introduced in 10.4 and persists through 10.4.1 Consider the following implicit region: ...
9
votes
0answers
67 views

Is there a way to TagSet a HoldAllComplete function?

Let's say I want to overload the built-in function Lookup, to handle my data wrapped in myObject. One would use ...
9
votes
0answers
95 views

LinearProgramming returns an invalid null solution that apparently doesn't satisfy constraints without any warning

Bug introduced in 10.3.1 or earlier and persisting through 10.4.1 While searching to answer the question Solving the magic backyard puzzle with MMA at some time I composed a set of arguments ...
9
votes
0answers
97 views

Set new edge capacity

Bug introduced in 9.0 or earlier and persisting through 10.3.1 I am trying to add a new edge to an existing graph and set its capacity, but for some reason the ...
9
votes
0answers
106 views

ListDensityPlot3D does not antialias axes

I sent a bug-report to Wolfram and the case number is [CASE:3454878] I'm on Linux with Mathematica 10.3 and I have my 3D graphics output set to the highest "Antialiasing Quality". It works fine for ...
9
votes
0answers
221 views

Image Processing: Car front detection

Background Image processing can be applied to car license plate detection problems see Wikipedia, segmenting numbers, belisarius's old answer. Also, on this site once can use some techniques ...
9
votes
0answers
69 views

Is this behaviour, producing OutputSizeLimit`Dump`encapsulateOutput, a bug?

Bug introduced in 6.0.0 and persisting through 10.2.0 The input ...
9
votes
0answers
96 views

Strange result of DeleteCases in an association

The function DeleteCases can be used for associations, also with level specification. Here is an example where some values are associations: ...
9
votes
0answers
158 views

Wrapping text around pasted graphic

I would like to use Mathematica to create all my documents for my high school math class. I cannot, however, find a way to copy and paste a diagram (let's say from Geogebra) and then place it where I ...
9
votes
0answers
118 views

Mathematica is getting slow when repeatedly calling an external program

I found a strange phenomenon that Mathematica is getting slow when I repeatedly called an external program by using ReadList. For example, the following code will display a significant increase of CPU ...
9
votes
0answers
150 views

Confused by the opts : OptionsPattern[ ] pattern

I'm trying to make sense of the syntax in the clause opts:OptionsPattern[], as found in this standard "rule-based" (pseudo-)function definition pattern: ...
9
votes
0answers
171 views

Make the map of rivers and lakes of the country

As I understand,first of all I should to get the country's map and the river's list. To get country map is simple: ...
9
votes
0answers
533 views

Step-by-step instruction to Install C Compiler

I remember using C compiler on my previous computers, and I never had any problems installing them. At this time, however, I failed to work through the instructions provided in Mathematica ...
9
votes
0answers
101 views

Smart use of ParallelMap over Plus

I'm looking for ways to speed up calculation of a integral with a many-terms integrant. The obvious way is to go in parallel. I was surprised, but for some tests integration by ...
9
votes
0answers
214 views

Mathematica and POV-Ray workflow: ListContourPlot3D

I have the following function describing a molecular electronic Orbital. ...
9
votes
0answers
342 views

J/Link doesn't work with Java 8?

I have some code that successfully uses J/Link (well... until today when something I was doing something with it that crashed the JVM, so), and I recently tried running it under Java 8. I then get a ...
9
votes
0answers
80 views

Is “MaxMessageCount” broken or is its function counter-intuitive?

Behavior remains unchanged through Mathematica version 10.1.0 As noted by kguler the Front End option: MessageOptions -> "MaxMessageCount" does not appear to ...
9
votes
0answers
152 views

Can I use symbolic tensors for simple linear algebra and calculus?

As an example, I'd like to calculate this symbolic derivative: $\frac{\partial}{\partial b}(x-A.b)^{\mathsf{T}}.(x-A.b)$ where $x$ and $b$ are vectors and $A$ is a matrix. What I tried is this: ...
9
votes
0answers
158 views

Bug in PositiveDefiniteMatrixQ?

Fixed in 10.1.0. Exists in at least 9.0.1 -- 10.0.2. This seems like a bug in PositiveDefiniteMatrixQ to me: ...
9
votes
0answers
433 views

How can I find the source of a memory leak?

I found a really weird issue using NDSolve`ProcessEquations inside module. We start by setting HistoryLength to 0. After this we define a function which takes in an integer and creates a Table of ...
9
votes
0answers
142 views

How can I obtain the absolute settings of some Grid options?

For example: Grid[{{10!}, {5!}}, ItemSize -> Full, Frame -> All] What's the real value of Full? How can I map the <...
9
votes
0answers
243 views

Improving the performance of a package for working with rational functions

As Mathematica gets slow for large symbolic calculations, the cost of putting terms over a common denominator (Together), in particular, gets too high. It occurred ...
9
votes
0answers
1k views

Resources on Mathematica and strong AI (a.k.a. AGI)

David Deutsch (physicist / quantum computing theorist) wrote an article for Aeon Magazine last year: On Artificial Intelligence that got me thinking. The article assesses and critiques the ...
9
votes
0answers
248 views

Is there a way to teach integrate new solutions?

I have an integral which I can solve, but integrate cannot: ...
9
votes
0answers
171 views

How can we extend the predictive interface so it can suggest new operations?

Introduction Mathematica 9 has introduced a new predictive interface. For each output, it suggest possible actions the user might want to take. How can this interface be extended so that it will ...
9
votes
0answers
699 views

Does Mathematica use the Elliptic Curve Method (ECM) in FactorInteger[]?

I'm not a mathematician, and I'm not even going to pretend that I understand anything of the ECM. But I know it can be a fast method for factorization. I benchmarked the factorization of $$...
9
votes
0answers
355 views

How to style and position VerticalCallouts and RadialCallouts

Here is a pie chart with a labels placed with a "VerticalCallout" ...
8
votes
0answers
81 views

Why isn't ToElementMesh figuring out what my boundary is in 3D?

I am trying to change the element mesh for a FEA application I'm doing. I thought I understood it, when I did it in 2D. Here's my shape: ...
8
votes
0answers
129 views

Exporting a high-resolution GraphPlot of a very large graph (65,536 nodes)

Problem I have a very large graph of 65,536 vertices. GraphPlot yields: But the vertices are too dense to see in any detail, and attempting to use any of the on-...
8
votes
0answers
43 views

How to setup logging levels?

I was wondering what tools exist out there for doing logging in Mathematica? The Echo functions is nice, but I'd like to set various severity levels and other ...
8
votes
0answers
81 views

Defining a MeshRegion from a list of points and Polygons with duplicate points does not work in 10.4

Bug introduced in 10.4 and persists through 10.4.1 This code produces a MeshRegion in versions 10.0 through 10.3.1, ...
8
votes
0answers
397 views

Mathematica 10.4.0 hang on startup, killing WolframKernel fixes it

I just upgraded to Mathematica 10.4 (Site Home Use) on Ubuntu 15.10 (x86-64). After entering the activation key and clicking Activate, I got a message "Activation was successful", and then the window ...
8
votes
0answers
76 views

What is the equivalent of $ModuleNumber for DynamicModule

Mathematica provides access to $ModuleNumber which can be enormously useful. Unfortunately I can't find the equivalent for ...
8
votes
0answers
65 views

Problem exporting Graphics3D into PDF

When I try to export some Graphics3D, like this one: into a PDF file I get a bad appearance like this: It's possible to fix? Steps to reproduce the problem: ...
8
votes
0answers
119 views

What are the time and space complexities of Classify/Predict?

Does anyone have knowledge of the O(n) time & space complexities for various model types supported by Classify[] and ...

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