6
votes
0answers
164 views

Where to download the MathWorld package?

I was trying to run some notebook I downloaded from MathWorld, but lots of them need << MathWorld`Curves` I tried to google it , only to find this, but ...
6
votes
0answers
169 views

Poor CUDALink performance, when calling a kernel multiple times

When working on a project of mine I noticed that CUDALink shows very poor performance when calling CUDA kernels multiple times in a loop-construct. To demonstrate this I put together this little ...
6
votes
0answers
121 views

Possible bug with FourierTransform linearity

Each component is easily transformed but the sum is not: FourierTransform[f''[x], x, k] FourierTransform[f'[x], x, k] ...
6
votes
0answers
146 views

Documentation for user-defined functions; undocumented documentation feature?

I stumbled on some strange behaviour when trying out the new function template and documentation features, now purportedly working in v 9.0.1. I defined a function ...
6
votes
0answers
132 views

Using FunctionExpand to evaluate symbolic derivatives

Some symbolic derivatives of certain special function are not expanded automatically, but FunctionExpand often helps to get a derivative-free closed form ...
6
votes
0answers
76 views

Slow NIntegrate over complicated domains (sometimes)

Overview I have a very large matrix I need to calculate where each element requires the integration of a product of two functions over some complicated domain. I would like to find a set of options ...
6
votes
0answers
174 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 ...
6
votes
0answers
123 views

Fourier transform over a custom dimension

I have a multidimensional array A. Fourier[A] finds the discrete Fourier transform over all dimensions. How to find discrete ...
6
votes
0answers
92 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. ...
6
votes
0answers
56 views

Is there a way to get BSplineFunction beyond MachinePrecision?

I have been using BSplineFunction (Mathematica 8) to generate a smooth representation of some data, which I might then do some further processing on. As I ...
6
votes
0answers
241 views

Remote Kernel - Error = MLECONNECT

Configuring a remote kernel with the Kernel Configuration Basic Options I manage to have a new kernel in the list of the kernel that I can open. However when I start the new kernel I get asked for the ...
6
votes
0answers
85 views

Automatization of SyntaxInformation and argx?

Does anybody have a good way to automate the setting of SyntaxInformation for any custom function? I have a ton of functions for which I want to set SyntaxInformation, and doing it by hand seems a ...
6
votes
0answers
69 views

How can autocomplete entries be added for DownValues and Properties?

I'd like to assign DownValues to a symbol like this x["firstvalue"] = 1; x["secondvalue"] = 2; And then have the ...
6
votes
0answers
110 views

Is there a function to generate a minimal clique cover?

This is a graph problem known as the "Clique Edge Cover" or "Intersection Number" problem, and the goal is to find, from a given graph like $E=\{\{a,b\},\{a,c\},\{b,c\},\{b,d\},\{c,d\}\}$ and ...
6
votes
0answers
170 views

Is it possible to run Mathematica on an HPC cluster with Torque?

I'm installing Wolfram gridMathematica in HPC cluster with TORQUE Resource Manager. There is a big problem because Mathematica suppost PBS pro. Can you help me or give some advice or coments?
6
votes
0answers
384 views

Numerically solve 2nd order differential equation with singularity

Consider a second order differential equation with a potential that diverges at some generic value in the variable. For example: $$-y^{\prime\prime}(s)+\frac1{\mathrm{cn}{(s\mid k^2)}}y(s)=0$$ where ...
6
votes
0answers
94 views

Compiled function crashes kernel when trying to list over different length arguments

I'm trying to speed up a tally/binning operation that I have to run many times. I have many lists of between 1 and 10 numbers from the range [1,5] and I want to ...
6
votes
0answers
107 views

Design considerations behind `O` (a.k.a. BigOh, a.k.a. Landau Order)

This works without any warnings: O[Log[x]]. This raises a warning: O[x^2]. I have a few questions around this: Why is it a ...
6
votes
0answers
161 views

Using stateful web services with Mathematica 9

The WebServices package in Mathematica 9 no longer seems to support stateful web sessions. This requires the client (i.e., the WebServices package) to pass back the HTTP Cookies that it receives from ...
6
votes
0answers
158 views

Calculating the rank of a huge sparse array

By virtue of the suggestion in my previous question, I constructed the sparse matrix whose size is $518400 \times 86400$, mostly filled with $0$ and $\pm 1$. Now I want to calculate its rank. Since ...
6
votes
0answers
136 views

Mathematica 7: “LessEqual::nord:” error when using NMinimize on a real function

I encounter a problem (Mathematica 7) similar to Strategies to avoid LessEqual::nord in NMinimize? but the advised strategies don't work for me. Also, I get different results with different ...
6
votes
0answers
135 views

In .NET/Link, how do I not open multiple kernels?

I'm writing an ASP.NET page intended for multiple users. On the backend we have datatypes that are primarily mathematical, and interact with Mathematica for string-to-double evaluations, among ...
6
votes
0answers
290 views

Reproducing the Integral Definition of the Modified Bessel function

I need to simplify some integral expressions in terms of special functions, such as the modified Bessel function of the first kind. See for example Eq. (5) on this page. Notice that the real ...
6
votes
0answers
187 views

What are the known differences between Save and DumpSave, and how to account for them?

Edit: I changed the title and (slightly) the wording of this question in order to make it more easily answerable. If I evaluate this in Mathematica 9: ...
6
votes
0answers
314 views

Incomplete implementation of units?

I've been playing around with the new units capability in MMA9 and I'm becoming a bit frustrated with what I perceive as an incomplete implementation of this capability and I'm wondering if there are ...
6
votes
0answers
94 views

Associating symbol pages with symbols (Workbench)

Normally when you have symbol Abc, WorkBench creates a symbol page named Abc. Then when you make a build, type Abc and then press the F1 key, you are sent to the Abc symbol page. Suppose however ...
6
votes
0answers
483 views

Changing the background images of a slideshow presentation

Mathematica 9 lets you create presentations with background images. There are 6 default stylesheets for this: Earth, Garnet, Sapphire, Opal, Sunrise, Steel and Water. For your existing ...
6
votes
0answers
234 views

Realtime audio processing using Dynamic

Can I make real time audio processing with Mathematica in the same way I can do with images using Dynamic[CurrentImage[]]. I know that is possible to use ...
6
votes
0answers
764 views

Limiting the use of discrete graphics card on Mac

Apple's laptop running Mac OS have a pretty nice feature to make the battery last longer: the dynamically switch between the low-power integrated graphics card and the higher-performance dedicated ...
6
votes
0answers
173 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 ...
6
votes
0answers
417 views

Optimizing NIntegrate for higher PrecisionGoal

By default, NIntegrate works with MachinePrecision and its PrecisionGoal is set to ...
6
votes
0answers
373 views

Sensitivity Analysis: Global Sensitivity and Screening

I have a model which accepts several input parameters and now I want to study the sensitivity to certain parameters as described in here: Cross Validated Answer and in Wikipedia. There is also a link ...
6
votes
0answers
422 views

Using Mathematica as a data visualization front end for .Net applications?

I have a C# application that has 3-dimensional data that I wish to plot. Controls in C# for surface modeling are, in my experience, rather limited. I wish to have my C# application send the 3D point ...
6
votes
0answers
230 views

How to produce the ILU0 or ILUT as stand-alone procedures on sparse matrices?

Mathematica uses the ILU0 procedures automatically to precondition large sparse linear systems; e.g. ...
6
votes
0answers
137 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: ...
6
votes
0answers
392 views

Increasing recursion speed in Hull-White trinomial tree calculation

First timer here and have been finding these boards very useful in learning Mathematica. I'm trying to implement a numerical procedure for the Hull-White trinomial tree in Mathematica. Despite using ...
6
votes
0answers
282 views

Inverse of a large sparse Hermitian block matrix

I am looking for a method (if it exists) for the inverse of a large sparse Hermitian block matrix. The off diagonal sparse matrices, named δ are 4x4, and they have ...
5
votes
0answers
65 views

In version 10 EvaluationCompletionAction “ShowTiming” no longer gives useful output; any solutions?

In version 10 using this Front End option no longer gives useful output: SetOptions[$FrontEnd, EvaluationCompletionAction->"ShowTiming"] In version 7 the time ...
5
votes
0answers
72 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: ...
5
votes
0answers
139 views

Calculating probabilities symbolically

Is there a way to solve for statistical quantities analytically/symbolically in Mathematica? example 1: Lets say that I want to do a calculation that requires Bayes theorem. I know p(a), p(b) and ...
5
votes
0answers
154 views

Why is this infinite series wrongly computed by Mathematica?

Could you let me know if Mathematica (newer versions) is able to correctly compute this one? Sum[(-1)^(n + 1) Cos[3^n x]^3/3^n, {n, 1, Infinity}]
5
votes
0answers
79 views

How can I make sure that 3D plots have the exact same orientation and viewpoint?

First off, I apologize that I can't come up with a simpler working example, but I only seem to have this problem with the larger examples. I am trying to make animations, using functions like the ...
5
votes
0answers
67 views

Third syntax version of LogitModelFit: unexpected result of “BestFit”

The third listed syntax version of LogitModelFit allows one to specify input in a simple way: Only a design matrix (with a row of values of the explanatory input ...
5
votes
0answers
119 views

How to fix a PDF line rendering problem in V9

If I run this in V8 ...
5
votes
0answers
93 views

Is there a PrimeQ whose accuracy guarantee you can adjust?

Say I have a list of a million integers each with a million digits, and I want a crude sieve to see which have a chance at being prime. Mathematica has a PrimeQ function, which appears to be slow ...
5
votes
0answers
85 views

Can Apple's Numbers spreadsheet link to a Mathematica function?

I use Apple's Numbers spreadsheet for a single thing, a double entry accounting model to understand complicated financial transactions. A current model depends on the value of a single initialization ...
5
votes
0answers
44 views

How to robustly apply ToBoxes to a Dynamic expression?

Inserting a Dynamic object in a boxform expression messes up syntax colouring. See the following example. where the variable ...
5
votes
0answers
72 views

Mathematica 9 Autocomplete Pop-up issue

I've just installed Mathematica 9.0.1 Student Edition on my Laptop and my Home PC. On my Laptop, it works just fine. But on my Home PC I get this weird issue of the pop-up command autocomplete window ...
5
votes
0answers
98 views

Output most efficient Fortran code by mathematica

I am trying to output most efficient Fortran code by mathematica 9.0 with the method Simon provided: How can I get Mathematica to produce better Fortran code? The expressions is as follows: ...
5
votes
0answers
181 views

Estimation of vector autoregressive (VAR) process

To estimate 1-dimensional VAR process (which is AR process) you can easily use functions EstimatedProcess or ...

15 30 50 per page