# All Questions

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### Use of Ito's lemma in ItoProcess

In the documentation for the ItoProcess it says: Converting an ItoProcess to standard form automatically makes use of ...
51 views

### Does anyone know the options for “HierarchicalEdgeBundling” in Mathematica?

I'm looking to reproduce the types of graph layout that are possible in D3 (http://bl.ocks.org/mbostock/7607999) in Mathematica. Since Mathematica doesn't explicitly support force directed edge ...
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### Software for effectively modeling gears

Are then any applications for effectively modeling gears in mathematica?
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### ParametricRegion question - a bug report

It is just to report that the request: ?ParametricRegion does not return the expected definition. Instead I see this: ...
150 views

### Combining key pivoting and lookup operators in Dataset

This question is related to this one re pivoting on keys. Because of the nesting, using Leonid's method as starting point - single key: ...
81 views

### How to show gif animation inside Manipulation in the cloud?

This creates a manipulate object show two static plots, ...
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### Authorizing use of proprietary code in the cloud?

As I continue to refine my working approach to deploying proprietary Mathematica code (see: Prevent package from being opened in a notebook interface and Run encoded package code through ...
63 views

### How to include automatic references to cells styled with DisplayFormulaNumbered

Under the Style menu, there is an entry called DisplayFormulaNumbered. It does exactly what it seems to suggest: it indexes the ...
142 views

### Why setting PlotPoints make my 3d contour plot broken?

I'm trying to make a iso surface plot from some data using ContourPlot3d. My data is a 3 dimension data with form like {{x,y,f[x,y]},...}. I first make this data ...
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### What are good/best practices to take the Fourier transform of an InterpolatingFunction?

I have a function which I have obtained from numerical integration of a differential equation, and I would like to take its Fourier transform. What are good practices for doing this? To make things ...
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### Module in numerical model for NonlinearModelFit is slow and leaks memory

I am trying to make a NonlinearModelFit where the model is the result of a numerical calculation. My code works, but it is very slow and also seems to have a memory ...
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### Is it possible to model the piano key attack?

My purpose is to model the attack of a piano key. As the key is pressed a sound must be emitted. When the key is released the sound must stop with decreasing volume. I have a partial success when ...
266 views

### Function with a sharp resonance which Mathematica fails to integrate. Why?

I'm a new user of Mathematica and I'm trying to use it to calculate the collisional cross-section as a function of energy for a given potential and decay rate. I know that the resulting function ...
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I have this expression: $d=-\frac{\sqrt{\frac{780 (f+130) \left(5 d^2 (13 c+f+130)-5 d (c (f+1300)-325 (f+160))+125 \left(2 (2 c+725) f+5 f^2+104000\right)+13 d^3\right) \left(5 d^2 (52 c+17 ... 0answers 89 views ### Derivative of generating function (Example from documentation) In the documentation for GeneratingFunction, the following example is given under Examples -> Properties & Relations -> Derivative: ... 0answers 97 views ### Getting Arg[z] to go from$0$to$2\pi$I'm defining branch cut functions, and I'm using$arg(z)$as a building block. So I just spent an hour at the whiteboard assuming that$arg(z)$goes from$0$to$2\pi$, and then I implement the code, ... 0answers 115 views ### What can I do to improve the performance of my calculations? I'm trying to express a simple probability problem in Mathematica, but am having trouble getting my calculations to execute at a reasonable speed. I have an object whose unknown location is modeled ... 0answers 92 views ### Compiling/calling Mathematica-generated .so from C I'm trying to call a compiled function from a C program. I am generating the static object ... 0answers 214 views ### How to restrict the mouse cursor to stay within a box? I'm trying to use Mathematica to write small games, and I find that it would help to restrict the player's mouse into the game window (just like other games do). Is there any way to achieve this? ... 0answers 72 views ### LibraryLink parallel performance I'm trying to use a LibraryLink function in parallel. It is an embarrassingly parallel problem, so that no dependency between those parallel tasks. However I can only get the parallel efficiency about ... 0answers 109 views ### “Off-label use” of Mathematica functions for performance Assisting an acquaintance with a simulation where a very large number of binomial probability calculations are required, I pointed them to a slightly obscure function to dramatically speed up their ... 0answers 96 views ### Deciding whether a semi-algebraic set is empty. Which command is best? [Update] I was able to prove that the "larger" set$ 1\ge x \ge y,w \ge 0$and$p(x,y,w)>0 is empty with another computer algebra system in my slow laptop in few minutes but in Mathematica even ... 0answers 459 views ### Problem inserting data into a mysql table with column names having a space I have a mysql table whose column name has space. I tried inserting the data into this column. I got an error I tried a sample code, which tests accessing the columns with a space and that returns ... 0answers 114 views ### Using Graph to cull correlated lists I have a set of lists that represent molecular descriptors. I need to identify which descriptors are highly correlated and eliminate the correlated pairs. I can represent the connectivity by ... 0answers 308 views ### A* algorithm for finding shortest path in a graph FindShortestPath finds the shortest path between two vertices in an edge-weighted graph, allowing a choice between the Dijkstra and Bellman-Ford algorithms. In my (limited) understanding, both of ... 0answers 139 views ### Fourier transformation of HeavisideTheta functions I want to find 2D-Fourier transformation of the function given below f = HeavisideTheta[y1]*HeavisideTheta[y2 - y1] For the purpose, I use built-in function in ... 0answers 166 views ### Using NVIDIA 3D Shutter Glasses with Mathematica Mathematica has great capabilities to display 3D Graphics rendered to the 2D screen. This should make it perfectly suited to use the Graphics3D system together with an NVIDIA Graphics card, a 3D ... 0answers 315 views ### Masked Image Registration/Alignment/Correlation I'm trying to register (align) two circular grayscale images using a boolean mask to prevent them simply being aligned on the fixed circular border. There are also small fixed circular regions in the ... 0answers 115 views ### Non-linear integral equation I'm trying to solve with Mathematica an integral equation. I found this excellent answer (How to solve a non-linear integral equation?) solving with a collocation method a problem which can be ... 0answers 158 views ### Launching Remote Kernels takes a lot of time I recently played around with establishing a remote kernel setup without using mathematica grid. To do this I use the LaunchKernels[] command and ... 0answers 270 views ### How to determine BLAS/LAPACK implementation used internally for numerical matrix operations? Is there a command which reveals which implementation of BLAS and LAPACK are used in Mathematica's matrix operations such as Eigensystem? I asked a related question ... 0answers 106 views ### What is so special about variable s?

I found a nice bug in Mathematica 9.0.1.0. Could anyone check to reproduce it? Create a file temp.txt with one line: ...
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### Problem importing individual frames from QuickTime file

I am having difficulties with a code I am trying to run. Essentially I want to Read in a large .mov video file (60000+frames). ...
114 views

### random Poisson process over multiple variables (state vector) for chemical kinetics

Has anyone figured out how to coerce ContinuousMarkovProcess to work with a state vector, transition matrix, and rate (propensity) vector, and RandomFunction to return pairs of state vector and time, ...
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### Sparse Principal Component Analysis

I'd like to run sparse PCA on some economic data. There appear to be several R functions available including elasticnet and PMA but I wanted to check if anyone had something coded up directly in MMA ...
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### GUI Maker? Is there a perhaps drag and drop GUI maker for Mma?

IDE's like Borland, Eclipse, and others have ways of making GUI's. Drag and drop is usually the way of it. Then one puts the variables together and links up everything. Mma seems to handle (at least ...
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### Tools for Stability/Automatic Error Analysis in Mathematica

I have a longer analytic expression in several variables containing special functions and others. Does Mathematica bring tools - or are there any packages - to examine the stability when I evaluate ...
183 views

### How copy a large cell into clipboard using input text?

This is a strange problem and everything I tried did not work. I have a very large single Manipulate cell (it is a demonstration stylesheet notebook, hence this cell have to be one), and I simply ...
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### Where can I find the Distributions Palette?

I was watching the "Statistics: Modeling with Statistical Distribution" Training Course http://www.wolfram.com/training/videos/DAT016/ and in one of the slides, the following image showed up. Does ...
I'm trying to analyze a certain infinite sequence $S$, indexed by positive integers starting from $1$. It can be split into two subsequences: $S^{odd}$ by removing all even-indexed elements and ...