10
votes
1answer
284 views

Precise cropping with ImageCrop

The built-in ImageCrop function "effectively removes borders from image whose pixel value distribution is almost uniform" (emphasis mine). I need an efficient ...
12
votes
1answer
454 views

How do I remove Wolfram Branding in a CDF?

I have a Mathematica Enterprise License, which lets me export Pro-feature CDFs. One of the benefits is supposed to be removal of branding and full customization of UI. Does anyone know how to get that ...
8
votes
1answer
174 views

Import the “thumbnail” of an internet page

I have a list of internet sites links from which I would like to automatically recover the page image/thumbnail and page title. Let's suppose that one of the links is https://www.google.com/, I would ...
7
votes
1answer
375 views

Google Image Search in Notebook?

How can I use google's image api to custom search for images and import them all?
7
votes
1answer
687 views

Normal lines to surfaces or planes in a 3D plot

How do I make the normal line to a plane actually look perpendicular? ...
7
votes
2answers
222 views

How can I style a cell frame with rounded corners?

I'd like use rounded rectangles for my cell style, but I'm not sure if this is possible. Perhaps it can be faked with an image as a background for it?
11
votes
2answers
248 views

Function with custom Options and modified Options for built-in Symbols

I couldn't find a more descriptive title, but I guess an example will explain my problem. I set up some customized Grid function including some additional ...
4
votes
1answer
118 views

Copying a symbol using a subpackage

In this question, there is a beautiful method to copy a symbol. However, i'm not able to use it as an addon to my package. So the main question is How to rename/copy a function defined in a ...
1
vote
1answer
192 views

Collapse matching brackets [duplicate]

Well I'm not sure this is a good question for this site, but after reading the FAQ section it appears to be OK, so ... The question is related to the interface and not to computation difficulties. ...
5
votes
2answers
660 views

How do you draw credible regions/intervals on a 2D PDF?

I have some numerical data from which I generate a PDF via: pdf = HistogramDistribution[data]; Which can then be easily visualised thus: ...
5
votes
1answer
285 views

Problem with creating a large list of tuples

This is a follow-up question from Sum of Multinomial Coefficients I have thought about the meaning of the formula I mentioned and, with help, I implemented the following code: ...
0
votes
0answers
240 views

Mathematica, nested optmization [duplicate]

I want to use the solution of Maximize, defined as a function, in another function. Here's an example: ...
1
vote
0answers
43 views

plot[] with subsititution rule [duplicate]

I encounter this problem in Mathematica 9.0.1, I'm not sure if it ever happens in other version. Plot[{x, x + 1}, {x, 0, 10}, PlotStyle -> {Red, Green}] This ...
4
votes
1answer
255 views

How can I analyse Mathematica data using Wolfram|Alpha?

How can I analyse data stored in Mathematica using Wolfram | Alpha? Here is an example: I have a list: a = {1, 2, 3, 4, 5} I can plot it in Mathematica, like ...
5
votes
3answers
499 views

Using transparency in ContourPlot makes mesh visible [duplicate]

I am trying to use a ColorFunction with Opacity in ContourPlot. Here's my code: ...
5
votes
2answers
321 views

Symmetry-finding packages

Where can I find the most up-to-date or whatever you consider to be the most useful symmetry-finding package for differential equations? I do not intend to restrict to, but would like to include ...
3
votes
1answer
634 views

Non-commutative algebra

I'm constantly dealing with non-commutative algebras. ** is inbuilt, non-commutative and associative. That's good :-) But it is not distributive. Rats. ...
6
votes
3answers
288 views

Export Graph to PDF

I know that I exported Graphs to PDFs before but it doesn't seem to work any more. I tried K5 = GraphData[{"Complete", 5}] Export["K5.PDF", K5] And I get a PDF ...
6
votes
3answers
282 views

Permanent minors

The function Minors yields the minors of a matrix. Is there a function that yields the permanent minors of a matrix?
1
vote
3answers
114 views

Auto simplifications of power products

Mathematica automatically simplifies Exp[a]Exp[b] to Exp[a+b]. The problem is now that I can't do this ...
1
vote
1answer
390 views

Fourier transformation of solution of differential equation

I'm trying to plot a Fourier transform of solution of differential equation. I have tried with: ...
3
votes
2answers
254 views

How can I fill an entire Building with transparent points? [duplicate]

I am posting the same code found at an earlier question, although the concept here is totally different. The following code corresponds to a building-shaped structure. ...
6
votes
2answers
379 views

Merging two Lists

I have two tables. One is given by T1 = Table[{x, y, 0.}, {x, 0, V},{y, 0, V}] and from a calculation I have the second, a list of points {x, y, z} ...
4
votes
1answer
455 views

Connection to remote kernel can not be established - No specific error shown

I was trying to set up a remote kernel using Mathematica 8, a Debian server and a Mac OSX 10.8 client. First I configured a VPN connection between server and client and went through all the basic ...
6
votes
3answers
163 views

How to 'merge' a list like FromDigits, but with a mixture of numbers and symbols?

How do I go from {C,4,G,5,S,7} to C4G5S7
3
votes
1answer
145 views

Extending D for four-derivatives

I'm currently trying to consistently define rules for extending D[] to four-derivatives. As 'backend' I'm using the package TRACER (http://library.wolfram.com/infocenter/MathSource/2987/), which can ...
3
votes
2answers
185 views

Storing result from nested Table in a File for further computations

Consider the following: Table[Table[x = 20; y = 30; 2 i x + 3 j y , {i, 10}], {j, 3}] Suppose I want the result of this nested Table to be stored to an ...
3
votes
1answer
138 views

Why is the output of my limit expression an interval?

Why is the output of the limit below an interval? It should be precisely $1$. ...
5
votes
5answers
2k views

Specifying the size of open circle PlotMarkers in ListPlot

I would like to use ListPlot to plot some points. I would like the PlotMarkers to be open circles. I can use ...
2
votes
1answer
131 views

Differences between ParametricPlot3D and NIntegrate

I have a function $f : \mathbb{R} \rightarrow \mathbb{R}^3$ defined in a rather nasty way in mathematica however it's a smooth function and what not. I am interested in $f'[t]$ and when I run it ...
2
votes
1answer
140 views

Problem with numeric integration

I am having trouble with the UnitStep function as in the title. My problem is very simple, but I am not able to get a numerical result. I have ...
6
votes
1answer
144 views

Why is there a limit of 15 different instruments to be played simultaneously, with Sound / SoundNote?

It seems to be impossible to play more than 15 different instruments simultaneously with the Sound[{Soundnote[...],...}] construct. Any guesses why it is so? With ...
2
votes
2answers
424 views

How can I control the number format of exported data?

I'm having issues while exporting a tables of numerical values to "*.dat" data files. Here's the thing, sometimes when I export a table, I get more decimals on some random values. The problem is that ...
5
votes
1answer
995 views

Module with “local functions”

I am trying to use a Module having "local functions", i.e., those which I need to define only inside this module. So I tried this: ...
12
votes
1answer
1k views

Eigenvalues and Determinant of a large matrix

Can anybody kindly explain to me what is going wrong regarding a simple problem I have? I can find the eigenvalues of a large matrix using Eigenvalues[], but when I ...
7
votes
1answer
96 views

Attaching the same message to several symbols

It is common in many packages, as well as system symbols, that the same message can be issued by several functions. Here's an example: One mechanism that can be used for this is to define the ...
5
votes
2answers
447 views
-1
votes
1answer
161 views

How can I change the default output number form to accounting form?

By default, large numbers are displayed in scientific form in output like 1.2345 x 10^8 in Mathematica 8.0.4, but I would prefer having numbers in accounting form ...
12
votes
4answers
263 views

How to catch complete error message information

If I evaluate this expression: Module[{}, 1/0;0^0]; msg = $MessageList I get: ...
3
votes
1answer
147 views

Add new JDBC Driver to connect MM to SQL database

I cannot open a SQLConnection to a SQL vectorwise database and I assume the JDBC driver is the problem. A JAR file was provided to me - the only info additionally provided to me was the java class: ...
3
votes
2answers
613 views

3D scatter plot from a txt file

I have a txt file with space-delimited x, y, z coordinates of several points. The points are organized into groups of unequal size; the groups are delimited by skipping a line, like this: ...
12
votes
3answers
590 views

Mathematica Parellelization on HPC

I'm currently using Mathematica on a High Performance Cluster (HPC) which consists of many compute nodes each with around 16 cores. I currently run my Mathematica script on 20 of the nodes that ...
0
votes
2answers
2k views

Export plot data in Mathematica [duplicate]

How can I export data, which is plotted using something such as: Plot[Γ[x]/(1.6*10^(-19)), {x, 0.1, 1.2}] into a .txt file in Mathematica?
3
votes
4answers
305 views

Mapping over the last level of a list, or equivalent operations

I would like to style each element of my list using Style. But when I try ...
4
votes
1answer
385 views

CUDALink is not initialized

I've upgraded to Mathematica 9.0 on Ubuntu 12.04 with the latest Nvidia driver (304.64). I load CUDA by using, as usual, Needs["CUDALink`"]. ...
2
votes
2answers
66 views

Invalid comparison in RegionPlot

I'm trying to plot something like this: RegionPlot[0 < (.5*a2 - .25*a1)/(a2 - a1) < 1 && 0 < a1 < a2 < 1, {a1, 0, 1}, {a2, 0, 1}] The ...
8
votes
4answers
702 views

Numerical integration of a numeric data available as a nested list

I have some numerical data in the form of a list with the following structure: {...{x,y,z},...} defining a surface z=z(x,y) in a 3D space (x,y,z). The data came from a simulation, and I am ...
3
votes
3answers
295 views

How can I fill a wire-frame structure with gas in a Graphics3D drawing?

I am very poor at visualization. I want to make a transparent "building" filled with gas. I wrote the following code for the building and it's fine. ...
16
votes
1answer
437 views

List manipulation to build a functional expression

Since Mathematica deals with Head[a, b] as an expression in this way The first Part of Head[a, b] is ...
8
votes
1answer
469 views

Control objects Sizing and placement in Graphicsgrid Vs Grid:

I have created a grid, and also made a list of control objects(e.g., input fields, buttons, etc.). Then, I lay the list in my grid. There is no problem. However, the final layout takes a lot of time. ...

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