2
votes
0answers
71 views

Are there some other ways to solve a second PDE except DSolve?

I have a partial differential equation as follows: $$\frac{\partial p(x,t)}{\partial t}=\text{Dp} \frac{\partial ^2p(x,t)}{\partial x^2}-\frac{p(x,t)-\text{p0}}{\tau }$$ What I try to do was to get ...
2
votes
0answers
218 views

Visualising Special Relativity

Mathematica newbie learning by doing (or not so far, in this case). Problem: Special Relativity - consider two inertial frames $A$ & $A'$ in relative motion. At a time $t0$ as measured in $S$, ...
2
votes
0answers
91 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 ...
2
votes
0answers
105 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 ...
2
votes
0answers
44 views

Autocomplete from inside Module and SetDelayed

Autocomplete in Mathematica 9 offers suggestions from inside SetDelayed and Module. For example, after running: ...
2
votes
0answers
65 views

Assign a value to a variable without using Set or SetDelayed?

I supose probably yes, but at the end I assume that internally mathematica has to use Set or SetDelayed. Am I right? Background: I am developing a super simple phraser that takes a code description ...
2
votes
0answers
172 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 ...
2
votes
0answers
81 views

Young Tableaux Miscellanea

I have a problem which is mostly neatly described by using Young Tableaux. Mathematica seems to have these Tableaux built in, except that the Tableaux function is ...
2
votes
0answers
77 views

Internal Shooting Method of NDSolve in combination with NDSolve`Reinitialize?

To explain my problem, I am trying to extend the BVP problem example from the help that illustrates how to use the shooting method of NDSolve: ...
2
votes
0answers
168 views

Remote kernel shuts down after several seconds

I have Mathematica 9 installed on two Windows Server 2008 R2 machines. Now i want to try using one of them as a frontend with local kernels and the other one for remote kernels. OpenSSH 6.5 for ...
2
votes
0answers
68 views

Problem with files size

I need to work with long time series, but I notice that this generates huge files that Mathematica doesn't handle well at all: even opening/saving one of this files is difficult, and the kernel quits ...
2
votes
0answers
35 views

Am I using the cell option setting PageBreakWithinGroup->False correctly?

I had expected that this option would prevent a page break occurring within a group of cells of which this cell is the "group leader". In my case it is a "Subsubsection" containing a group of ...
2
votes
0answers
91 views

How do I toggle between the program snippet form of a displayformula and the human readable form of the equation?

I have a DisplayFormulaNumbered cell in my Mathematica notebook. If I use the Cell | Convert To menu item to convert the cell to Standard or Traditional Form, the formula is now rendered as a program ...
2
votes
0answers
51 views

Autoupdate Section Numbers? - Technical Document Authoring with Mathematica

Technical document authoring systems are structured ways to create, manage, and update documentation for various mediums such as print, pdf, web, etc. Take a look at this technical document ported to ...
2
votes
0answers
114 views

Global vs local adaptive integration: lattice propagator

I was doing the first exercise in the paper Lattice QCD for Novices. This is the expected result: With the default "GlobalAdaptive" method for NIntegrate it threw errors saying that the error had ...
2
votes
0answers
47 views

Profiler calls function without providing true arguments

I found Profile[] in the Mathematica workbench does not run on my function. To investigate, I provided a simple function, ...
2
votes
0answers
137 views

4 circular arcs, how plot the minimal surface?

By using Sjoerd de Vries code for circular arcs: ...
2
votes
0answers
141 views

Mouse cursor disappears

After working on a notebook for a while sometimes my mouse cursor disappears. I can click on different cells and the text cursor will move accordingly but I just can't see the mouse cursor. Just now ...
2
votes
0answers
105 views

Calling Mathematica from Lazarus/Freepascal

I will appreciate if anyone can give me an hint about freepascal and mathematica mathlink communication. I'd like to build a Form using Lazarus/freepascal that call mathkernel. I'm trying to move ...
2
votes
0answers
73 views

Limit[Sum[(2*E*n)^w/(w^(n/2+w)), {w,2,n}],n->Infinity]

I would like to show that the following (and other similar formulae) tends to zero. Limit[Sum[(2*E*n)^w/(w^(n/2+w)), {w,2,n}],n->Infinity] What's the right ...
2
votes
0answers
87 views

Slow integration of interpolating function

I have a large file with irregularly spaced data in the format: ...
2
votes
0answers
70 views

CDF Infokit question

In the CDF Infokit, one finds the BriggsCochraneCalculus.cdf document, which shows a textbook on calculus. I've got two questions about how it was made: How has ...
2
votes
0answers
74 views

Different delays in notebook and command-line?

I was surprised by the following sequence of expressions: Remove[foo$, bar$]; foo$ = Function[Set[bar$, 42]]; At this point, I expected ...
2
votes
0answers
32 views

The value of PageWidth doesn't work for saving as HTML?

CellPrint@Cell["Test","Text",PageWidth->300,Background->Red] And I got this snippet of HTML code: ...
2
votes
0answers
54 views

Understanding NDSolve::ndsz

I'm working on a largeish system of differential equations where I encounter the NDSolve::ndsz step size is effectively zero; singularity or stiff system suspected ...
2
votes
0answers
99 views

Tooltip in Listplot - Export to PDF

I would like to export a listplot as a PDF document without loosing the tooltip information on the single points. It kind of works with hyperlinks. Nevertheless this workaround is pretty limited and ...
2
votes
0answers
43 views

No Symbols Matching $InterfaceEnvironment

I'm running a webMathematica server (running Mathematica 9) and am getting some weird stuff in the log - specifically, I keep getting the following message: ...
2
votes
0answers
463 views

Solar system simulation (n-body physics) with OpenCL

I would like to simulate a n-body solar system in Mathematica. I have found the following example: ...
2
votes
0answers
99 views

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 ...
2
votes
0answers
195 views

What exactly is “ParameterErrors” of NonlinearModelFit?

I am trying to get what I call a "$\chi^2$ fit". This means taking a function $f(x,p)$ of the variable $x$ with a parameter $p$ and finding the value of $p$ that minimizes the "distance" from a data ...
2
votes
0answers
74 views

How do I use Greek characters in the WindowTitle option of CreateWindow?

I am trying to write some exercises in Greek using CreateWindow. My problem is with using Greek characters in the option ...
2
votes
0answers
66 views

How to get information during evaluation of a Mathematica script?

I have a Mathematica script table=ParallelTable[f[u],{u,0,40,.5}] Export["filename.csv",table] that computes and exports a table of a rather complicated function ...
2
votes
0answers
82 views

Constrain integration to be over real domain

I am trying to integrate the following: Integrate[(2*Cos[Sqrt[F]*z - G])/E^(D*(p + z)^2), {z, -(h/2), h/2}] I am getting solution in complex domain: ...
2
votes
0answers
144 views

Symbol with Subscript but no quotes in it!

If I use the following function to define me a fancy subscript: ...
2
votes
0answers
116 views

Series expansion: Taylor series takes huge amount of time

I'm working on a notebook, trying to expand the root of a cubic polynomial in Taylor series. When I type: ...
2
votes
0answers
113 views

Question about Solve

I don't understand what Mathematica is doing to get these solutions. I ask it to solve two equations, the left hand side of both expressions are the same, the right hand sides differ by a ± sign. I ...
2
votes
0answers
85 views

How to solve system of differential equations of arbitrary order (symbolic tensors)?

I am interested in solving systems of ODEs symbolicly, keeping things with arbitrary dimensions for clarity. For example, assume that $x, f(x) \in R^N$ and $A \in R^{N \times N}$, how do I solve ...
2
votes
0answers
88 views

Error message from V6.0.3 on Mavericks

With Mavericks, everything works fine except saving documents -- then I get this error: Internal self test error MacDialog | c | 2 Fixes? Ideas? Any help appreciated.
2
votes
0answers
101 views

Expanding a Function in Series works, SeriesCoefficient Doesn't Work

Take the following definitions: ...
2
votes
0answers
57 views

The “right” way to define a custom Encoding format?

I have implemented an Import|Export format for xz that behaves like gzip and other encoding formats: ...
2
votes
0answers
71 views

Is it possible to use Gaussian cgs units in $Mathematica$ computations?

I was trying to do computations in Gaussian cgs units, and of course I failed due to dimensional issues. For instance, $q_1 q_2/r$ cannot be converted to $\mathrm{erg}$ since Gaussian system uses ...
2
votes
0answers
36 views

Syntax for FrontEnd`SelectionSetStyle

I know FrontEnd`SelectionSetStyle is undocumented, but its name suggests it does what I need. What is its syntax? I have already tried several variations of the ...
2
votes
0answers
71 views

TableHeading Lines Do Not Show Up

For a list list = {{"a", "b", "c"}, {"d", "e"}}; Table heading lines do not show up ...
2
votes
0answers
97 views

FeynRules Package

Does any one use the FeynRules package? If so, how can I implement a vertex of one Gluon and two octet scalars? I tried ...
2
votes
0answers
86 views

How do I incorporate metadata using Export?

I have Export["file.png",codeThatMakesAGraphicsObject[],"PNG"]; and want to embed some specific metadata information. Is there a simple way to do that? Note ...
2
votes
0answers
185 views

Taking real and imaginary parts of indexed functions and speeding up ComplexExpand

I am setting up a large system of ODEs and in order to use the IDA method (which is sig. faster for my system and thus attractive), I must split my equations into real and imaginary parts. I am ...
2
votes
0answers
194 views

Exported PDF figure looks different in Apple's Preview than in Adobe PDF Reader

I'm trying to export figures into pdf, and the results looks good in Preview, but very bad in Adobe pdf reader. I'm using Mathematica version 8 on Mac 10.8.5. The Preview version is 6.0.1 (765.6) and ...
2
votes
0answers
103 views

Equation Solving: Solution in terms of predefined functions

Is there a way that I can have Mathematica give me the solution of a problem it has solved in terms of functions that I have predefined? The specific problem I'm trying to solve is: ...
2
votes
0answers
91 views

Use URLFetch in init.m

I'm not able to use URLFetch in my $UserBaseDirectory/Kernel/Init.m as it always returns ...
2
votes
0answers
323 views

Solving a diffusion equation

I need to solve a particular diffusion equation with NO boundaries http://astronomy.nju.edu.cn/~chenpf/c/courses/fluid/pringle81.pdf equation (2.10) with nu = cost. ...

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