# All Questions

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 ...
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 ...
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 ...
375 views

### Google Image Search in Notebook?

How can I use google's image api to custom search for images and import them all?
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? ...
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?
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 ...
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 ...
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. ...
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: ...
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: ...
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: ...
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 ...
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 ...
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: ...
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 ...
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. ...
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 ...
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?
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 ...
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: ...
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. ...
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} ...
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 ...
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
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 ...
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 ...
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 $1$. ...
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 ...
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 ...
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 ...
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 ...
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 ...
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: ...
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 ...
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 ...
447 views

### Saving table of plots into a single figure within a pdf file

I have following code: ...
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 ...
263 views

### How to catch complete error message information

If I evaluate this expression: Module[{}, 1/0;0^0]; msg = \$MessageList I get: ...
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: ...
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: ...
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 ...
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?
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 ...
385 views

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`"]. ...
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 ...
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 ...
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. ...