# Questions tagged [version-7]

Version-specific issues for Mathematica 7 (other than bugs).

95 questions
Filter by
Sorted by
Tagged with
269 views

### How to define the density of random 3D points and plot it?

The following code draws a random distribution of particles in 3D. The Manipulate box allows to change a few parameters (number of particles, size of clusters, ...). I would like to define the local ...
• 3,949
1 vote
126 views

### How can I improve this code?

The code below is working well, but it's very slow in the Manipulate box. I know that the Do and AppendTo parts aren't very ...
• 3,949
1 vote
73 views

### Is there "absolute" point size for Graphics3D?

I would like to get points size that vary when the viewer is zooming in/out through the 3D graphic. The point size I want should be defined as "absolute", relative to the coordinates used ...
• 3,949
74 views

### How to add random point size to this distribution of 3d points?

The code below creates a random distribution of points in 3D. Currently, the points have a random size, and the size is the same for all points. I need the points to get individually a random size, ...
• 3,949
206 views

### How to get fuzzy points in a 3D view?

I would like to produce fuzzy random points (sprites like) in a 3D view. Applying a Blur command doesn't do the trick since the view is then frozen and we couldn't rotate the view anymore, and I don'...
• 3,949
1 vote
155 views

### How to introduce random correlations in a 3D uniform distribution of points?

I would like to build a simple visualization of the distribution of galaxies on a large scale model of the universe. Currently, my galaxies are represented as uniform random black dots in a 3D cube, ...
• 3,949
51 views

### What is wrong with FrameTicks in this small code?

I'm having a problem with FrameTicks not working with this MWE: ...
• 3,949
93 views

### How to define smooth random initial conditions consistent with boundary conditions for this 1+2D PDE?

I wrote a fully working code to numerically solve a non-linear variation of the classic 1+2D waves equation. Here's a stripped down version of it (classic waves equation), with static initial ...
• 3,949
1 vote
104 views

### How to simplify this sum of random waves?

Is there a way to simplify the random functions and their calls, in the code below? ...
• 3,949
152 views

### How to make this moving surface a continuous and derivable function?

I'm having troubles in defining a function of three variables: $t$, $x$, $y$, from a moving bumpy surface that should be derivable relative to its three variables. Here's the animated surface code, ...
• 3,949
1 vote
111 views

### Randomly oscillating surface is not working well

I'm trying to built some random moving surface from a plane perturbed with random oscillators, and my current code isn't doing what I need yet, as seen from the ...
• 3,949
80 views

### How to insert variable height in this random bumps function?

I'm trying to insert a "time" variable that control the height of the random smooth bumps, but I'm yet unable to do it right, as shown with the code below: ...
• 3,949
158 views

### How to define a smooth function of random bumps in a plane?

I would like to define a simple function that gives random smooth bumps in a plane, a bit like the clumsy picture below, but it should be continuous: ...
• 3,949
1 vote
303 views

### Boundary conditions at infinity for 1+2D wave equation in Mathematica 7

To solve a waves equation, I need to define some boundary conditions. The wave is propagating on an infinite plane, and it's not a membrane fixed on some fixed support. I'm have difficulties in ...
• 3,949
343 views

### How can I add a few specific mesh (altitude-like level) curves to a plot?

I'm plotting the numerical solution of a differential equations, using the altitude-like level curves as a mesh. It's fine, but I would like to add three specific altitude levels as thick red, green ...
• 3,949
1 vote
73 views

### How to numerically solve this partial differential equation and plot the output? [duplicate]

Using Mathematica, I would like to numerically solve the following partial derivatives equation : \tag{1} \frac{\partial^2 \Phi}{\partial T^2} - \frac{\partial^2 \Phi}{\partial X^2}- \frac{\...
• 3,949
241 views

### How to draw borders around tiles of the same color?

I'm having difficulties with a project to show random tiles with a few random colors. Here's the code that I need to modify: ...
• 3,949
441 views

### How to draw random colorfull domains in a plane?

I'm trying to produce some graphics like the one shown below, with a few adjustable parameters to change the number and size of cells. The cells positions, sizes and colors should all be random (size ...
• 3,949
1 vote
204 views

### How to add noise to these random straight lines in 3D?

Here's a code that draws a pack of random straight lines in 3D: ...
• 3,949
329 views

### How to generate randomly curved and twisted strings in 3D?

Here's a code that draws a set of random straight lines in 3D: ...
• 3,949
1 vote
217 views

• 3,949
2k views

### Random non-overlapping disks in a square

I've found a nice code snippet by @belisarius from this question, that I'll reproduce here for reference: ...
• 3,949
407 views

### Alt+Gr issue with Mathematica 7 on linux

I have the same issue as described in https://matteochinazzi.wordpress.com/2010/04/12/mathematica-alt-gr-issue-under-linux/ So basically whenever I use AltGr to write [ or ] in Mathematica, it ...
287 views

### Distance between ticks and axes [duplicate]

I've created a plot using the following code: ...
• 787
1k views

### Place legend without border above the plot

I use Mathematica 7.0 and as far as I know, there is not method PlotLegends, only PlotLegend. I want to set my legend - without background, shadow and frame - above my plot, as in the example belowe: ...
• 787