# All Questions

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### Liouville theorem demonstration

My goal is to create a demonstration of the Liouville theorem in 2D phase space. I made up an interesting potential energy function $U(x) = (x-4)x^3 + 27$, so that the minimal energy of system is ...
213 views

### Modify BinList to give elements indices in list instead of giving the list elements belonging to each bin

How could I use BinList to give elements indices in list instead of giving the list elements belonging to each bin ? Thanks.
124 views

### Creating a nested menu with OpenerView

I have a file with the following structure: ...
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### How can I get the Predictive Interface to work in Slide Show environment?

It appears as though the predictive interface does not work in the Slide Show screen environment.
124 views

### How to make the animation rate lower in an exported GIF [duplicate]

I have a ".gif" figure exported from the following codes. 6 separated figures (frames) constitute a ".gif" figure. But the default time interval between each frame is less than 1 second. I hope to ...
179 views

### Stopping Mathematica from reordering expressions [duplicate]

I want Mathemtica to stop manipulating my polynomials! I mean, I want the output of Print[3 x + 5 + x^2] to be just $3x+5+x^2$, not $5+3x+x^2$ as Mathematica ...
386 views

### Plot the results of integrating a complicated Dirac-delta function

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I am using Mathematica 9 on a university computer. I am trying to use the basic commands for parallel evaluation. ProcessorCount evaluates to 4, but commands such as ParallelMap simply evaluate ...
340 views

### Gateaux (directional) derivatives and higher order differentials of a functional

I would like to calculate the Gateaux derivative of a functional (i.e. a function depending on functions). A simple example for the Dirichlet functional: $L(u(x))=\int_0^1 \frac{1}{2} (u'(x))^2 dx$ ...
317 views

### How to plot small values

I wonder, why small values (eg. 10^-1600) would not show on a plot? Here is a small example, where Evaluate gives a list of very small values and Plot does not show them, starting from x=20. ...
249 views

### Connect each point in the plot with all adjacent points

I have the following simple code. I need to connect each point in the plot with all adjacent points in vertical or horizontal line. ...
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107 views

### Two controls to Manipulate all elements of a list

Say, I have a list list and I don't want to assign different names to all its elements. What I want to do it to be able to interactively manipulate any of the ...
249 views

### Drawing an arrow head on a curve

I am trying to create an illustration for a paper and export it to PDF. Here is the code ...
214 views

### Parallel kernel and front end

I have a piece of code which looks like this: ParallelTable[ Monitor[ Table[ <code here> ,{i,i1,i2]; ,i]; ] so basically a ...
2k views

### How to find the magnitude of a vector?

I'm doing this exercise in Wagner's book (p.78) , and this is my attempt: ...
340 views

### A problem involving classification of data

Toady, I encountered a problem while trying to classify certain data. I have the coordinates of six points. ...
221 views

### Finding corresponding vertex from 3d to 2d

I have this simple 3d data points: ...
302 views

### Implementing key-value associations in Mathematica 9 with inexact numbers for keys

I'm not sure of what type of problem my issue falls into, so I haven't been able to search forums with any success. If this has already been solved then my apologies! Essentially I'm trying to set a ...
241 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 ...
20 views

### Manipulate Tutorials? [duplicate]

I am wanting to combine equations with sets of static data points in a manipulate and do the curve fitting by moving the slider bars on my independent variables. The best examples of this art may be ...
362 views

### On a Mac OS X, Ctrl-Backspace generates ascii code 8 (backspace), which is almost invisible but very annoying

When I press Ctrl-Backspace, Mathematica inserts what looks either like a tiny white space or sometimes is invisible. Actually, though, it is an ascii character code 8, also enterable in Mathematica ...
169 views

### Generate Random 3D Network using GraphPlot3D and loop

Instead of writing all this out I want to do the same thing with a loop and be able to manipulate n and k. The idea is to create a randomly generated network where n is the number of nodes and k is ...
279 views

### Write a number as the product of its two largest divisors

For even n >= 10 && n <= 98 I want to write n as the product of its two largest divisors (excluding ...
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### solving series of matrices by simply multiplication

I have a number of matrices {2*2} containing element in series ....so by what method I solve that ... ...