9
votes
0answers
214 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
231 views

Is there a way to teach integrate new solutions?

I have an integral which I can solve, but integrate cannot: ...
9
votes
0answers
209 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 ...
9
votes
0answers
327 views

Cluster a signal into areas of equal intensity

Introduction I have a greyscale photograph that I want to partition into areas of equal intensity. This means, that the integral over each partition should be (roughly) equal. There is no unique ...
9
votes
0answers
620 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
305 views

How to style and position VerticalCallouts and RadialCallouts

Here is a pie chart with a labels placed with a "VerticalCallout" ...
9
votes
0answers
266 views

Using Compile to speed up Function with PermutationProduct

I have the following fairly simple routine dot involving PermutationProduct that I wish to speed up using ...
8
votes
0answers
65 views

Why does the Ver. 10.0 FrontEnd lose matching of parentheses when we insert quotations?

I am running Mathematica 10.0.1 on a four-year old iMac running OS 10.6.8. The following irritating behavior occurs regularly: I have a list with parentheses, and later on I need to add something to ...
8
votes
0answers
55 views

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

Bug introduced in 6.0.0 and persisting through 10.2.0 The input ...
8
votes
0answers
106 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 ...
8
votes
0answers
203 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 ...
8
votes
0answers
60 views

Finding simplifying substitutions for an integral involving limits and integrand

[The following is based on a William Lowell Putnam Mathematical Competition problem.] Consider the definite integral: $I = \int\limits_2^4 \frac{\sqrt{\log (9-x)}}{\sqrt{\log (9-x)}+\sqrt{\log ...
8
votes
0answers
113 views

TimeConstrained[Delete[Range[1],1]] causes kernel crash

Run these two samples of code here (AFTER SAVING YOUR CURRENT WORK): Do[ TimeConstrained[ While[True, Delete[{1}, 1]; ];, 0.1];, {100}] ...
8
votes
0answers
110 views

What is stored in FrontEnd memory?

I quit the kernel, and closed all notebooks, leaving only the startup window. Yet when I open a new notebook, MemoryInUse[$FrontEnd] reveals that the FrontEnd still ...
8
votes
0answers
91 views

FinancialData[], what does “members” include?

I am doing some manipulation of historical stock prices on the NYSE. I want to go through each stock. To find the number of entities on NYSE, one can use: ...
8
votes
0answers
199 views

How to write markdown with Mathematica?

Usually I typeset with Latex and Compute with Mathematica and then copy the outputs as Latex code and insert them in Latex, so I have to switch between Latex and Mathematica frequently. Thanks to the ...
8
votes
0answers
111 views

How to make Graphics3D with multiple lighting sources being rendered faster

I have a very "precise"(through setting "SpherePoints") Sphere illuminated by hundreds of random color lighting sources. The ...
8
votes
0answers
79 views

Graph: PropertyValue changes and Dynamic

I almost never work with Graph in Mathematica but lately I helped someone with it. For this, I tried to make an animation using ...
8
votes
0answers
111 views

ParametricPlot MeshStyle bug in v10?

Update This bug is fixed in v10.0.2.0 Original Post The documentation gives the following code and says "Use a red mesh in the x direction and a blue mesh in the y direction:" ...
8
votes
0answers
130 views

How to export a text into eps without splitting

I want to use MathPSFrag in Mathematica to export graphics to EPS for inclusion in LaTeX files. However, with recent versions of Mathematica this does not seem to work very well anymore. I have fixed ...
8
votes
0answers
223 views

Interpolation on an unstructured (mostly-structured) grid in 4D+

I frequently need to perform interpolations on an unstructured grid. Mostly, with the purpose of filling grid holes and then later continue with regular grid interpolations. Mathematica V9 and V10 ...
8
votes
0answers
419 views

Problems running Mathematica 10 with Workbench 2 Windows 7 64 bit

My Workbench runs perfectly using Mathematica 9, however simple things which run just using the Mathematica 10 front end won't run when using Mathematica 10 and Workbench 2. These simple two lines of ...
8
votes
0answers
271 views

Dataset: cannot reproduce a basic example. A bug?

Just to report: I try to reproduce the very first example for the Dataset from the Documentation Center: ...
8
votes
0answers
128 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: ...
8
votes
0answers
203 views

TableView displays negative numbers incorrectly

I'm trying to substitute TableForm with TableView because TableView is more handy with big data . But on my Mathematica 9.0.1 (ubuntu 14.04_64bit) there is a problem with negative numbers: ...
8
votes
0answers
122 views

What are the possible security breaches in CDF content?

It has been noted on this site before that the free CDF player is notoriously trigger-happy in declaring dynamic content to be "potentially unsafe", and forcing the user to enable dynamic content ...
8
votes
0answers
130 views

Detect when InputField gets keyboard focus

How might I detect when an InputField comes into focus? For example ideally something like this would work. ...
8
votes
0answers
911 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 ...
8
votes
0answers
166 views

How to add big data into a CDF file, without it being loaded into memory

I have 1 GB of data that I would like to add to a CDF file, but I would like to avoid it being loaded into memory when someone opens the file (Free Player). One gigabyte of info takes a lot of ...
8
votes
0answers
164 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 ...
8
votes
0answers
341 views

Faster simplification of linear combinations of some specific functions

After some profiling I've found that my program spends most of its time in the simplification step. The program uses my simplification function many times (over different data). My calculation is not ...
8
votes
0answers
401 views

How can I export aligned equations to $\LaTeX$?

Using Palettes -> Writing Assistant -> Math Cells, you can enter aligned equations such as: ...
8
votes
0answers
196 views

Socket communication and player pro

I'd like to create a simple communication channel between MMA and the animation package 'Maya'. This is possible over sockets ( very simple, just sending and receiving strings). I've got this working ...
8
votes
0answers
258 views

Page Break Adjustment In Long Documents

Has anyone else had trouble in relocating page breaks in a long document? In a ~45 page long document I wanted to keep certain things on the same page. The system worked on the first three or four ...
8
votes
0answers
661 views

Inverse Laplace transform not obtained

I can't seem to be able to compute the inverse Laplace transform of a Laplace transform: ...
8
votes
0answers
163 views

TeXToBoxes and BoxesToTeX BoxRules options

A recent question has gotten me to look more into the tex conversion rules. Consider the following latex string: ...
8
votes
0answers
118 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 ...
7
votes
0answers
33 views

CountryData vs EntityProperty: why do different data access methods produce different results?

Illustrative example: using CountryData we are told the data is missing, but we can nevertheless access it via an ...
7
votes
0answers
62 views

How to rasterize a Graphics3D expression into an Image3D?

I'd like to make a 3d image from a 3d graphics. Unfortunately Rasterize@Graphics3D[Sphere[]] gives a 2d image, is there any function like a Rasterize3D that does ...
7
votes
0answers
58 views

Restarting random number generators where you left off

I have code that uses both RandomReal and RandomInteger a number of times to produces a sequence of $n$ data sets. After ...
7
votes
0answers
71 views

Incorrect Display on Linux (+HiDPI)

I have Linux on a HiDPI laptop, and after first installing Mathematica, the default font size is far too small: After searching for a few solutions, this can be fixed by either changing the ...
7
votes
0answers
150 views

What is a good way to code long, complex, compilable algorithms?

The functional paradigm of the Wolfram Language used in Mathematica is all around wonderful. For intense numerics, Mathematica comes with the ability to Compile ...
7
votes
0answers
132 views

Incorporating photos into a Mathematica-made web page

I use Mathematica to make my web page. I make various .nb files, usually with photos, and then use an Export command to convert the .nb file to an .html file with ...
7
votes
0answers
193 views

How to generate a random flow graph?

A flow graph is a rooted directed graph that the root reaches all other vertices. I need to generate a random flow graph in Mathematica. My idea is to use ...
7
votes
0answers
85 views

Color Snapping When Using VertexColors with a Tube with BSplineCurve as an Argument

I think I've identified a bug in how VertexColors are treated when rendering a Tube object where the underlying data is a ...
7
votes
0answers
97 views

MoonPosition and TimeZone support

With this question, I noticed some some weird results of MoonPosition. Consider the following code: ...
7
votes
0answers
115 views

How to get star coordinates for a given time

In the documentation of StarData, there is an example that shows how to get the altitude of Sirius at a given time (in the horizontal coordinate system). However, ...
7
votes
0answers
120 views

BoundaryMeshRegion::buncl error in V 10.1, that works ok in V 10.0.2

This code works ok in V 10.0.2 (from a post I was looking at here) I noticed what seems to be a regression bug. This code works in version 10.0.2 on windows 7 ...
7
votes
0answers
160 views

Mathematica and POV-Ray workflow: ListContourPlot3D

I have the following function describing a molecular electronic Orbital. ...
7
votes
0answers
94 views

ListPlot3D. Only plots about half of the data in a 3D matrix

Here is the data and the exact command I'm trying to run. I've had success with other datasets generated and written out to a file by the exact same program in the exact same manner but for some ...

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