Data visualization is the study of the visual representation of data, meaning "information that has been abstracted in some schematic form, including attributes or variables for the units of information"
33
votes
2answers
2k views
How to show solid bodies using volumetric rendering?
Note: This question was asked when Mathematica 8 was latest release. Version 9 has built-in support for volume rendering through Image3D.
There's an example on ...
14
votes
2answers
636 views
What is the best way to create a correlation matrix heatmap with values?
This may have been asked somewhere else, but I couldn't find an answer by searching. I'm trying to create a correlation table that colors the background behind the numbers as a heatmap. I've been ...
15
votes
4answers
1k views
Spherical density plot of data set
I have a somewhat large number of 3-dimensional unit vectors ( ~ 100 000 unit vectors), and I am trying to visualize their distribution. First thing I tried was ...
34
votes
5answers
1k views
Creating ghost trail effects
Does anyone know how to create a ghost trail effect? For a simple example look at this screenshot:
You can find the actual animation here. What I would ultimately like to see it happen is to make ...
17
votes
3answers
708 views
Visualizing a Complex Vector Field near Poles
I've been playing around with a visualization technique for complex functions where one views the function $f: \mathbb{C} \rightarrow \mathbb{C}$ as the vector field $f: \mathbb{R^2} \rightarrow ...
14
votes
1answer
275 views
Labelling ArrayPlot Charts
I have been using ArrayPlot to show off some information. Currently, my datasets are like so:
...
32
votes
3answers
809 views
Visualizing the difference between two sequences (strings)
I'm trying to develop a way of comparing two sequences (probably originally text, such as text writing or source code, possibly converted to lists). As a familiar example, consider the revisions ...
11
votes
0answers
302 views
Strategies for Interfacing to web visualization libraries like Stanford's Data-Driven Documents (D3)?
There is a growing library of visualization tools being developed (eg on GitHub) - for Stanford's Data-Driven Documents. The implementation languages and standards are the usual W3C suspects: JS, ...
13
votes
1answer
290 views
Gravatars/identicons with Mathematica
The default avatar/identicon is based on an MD5 hash of your e-mail address. With some e-mail providers (e.g., GMail) the address gmailuser+foo@gmail.com is still ...
15
votes
6answers
1k views
Using ListPointPlot3D to simulate 2D plots moving in time
I wrote a 1D solver for the heat equation $u_t=u_{xx}$, and I can animate the solution using normal ListPlot command, where the x-axis is the rod length, and the ...
30
votes
4answers
819 views
How to visualize 3D fit
I have a data set of x,y,z values and I fit a function of x,y to the data. This works, but I can't come up with a nice way to ...
32
votes
0answers
731 views
How to construct a treemap using non-rectangles?
I've written the standard version of a tree map (a graphic that shows nested data) and I'm looking to improve on this layout by switching to different types of polygons or perhaps circles. Can anyone ...
20
votes
7answers
567 views
Graphical representation of a moving sound source
Some explanation since I have got a specific and another more open-ended question:
I used two microphones in a 90° arrangement (see picture below) to capture sound from a source moving around the room ...
12
votes
2answers
426 views
Higher order periodic interpolation (curve fitting)
I have a list of points in 3D, and I want to get a smooth interpolation or curve fit (it is more for illustration) of these points such that the first and second derivatives at the start and end ...
21
votes
3answers
449 views
How can the opacity of a dense data set be automatically chosen?
The problem
In a dense data set plotted with opaque points, data points can pile on top of each other. This can cause serious problems with the interpretation of the plots. I'll use as an example a ...
15
votes
5answers
500 views
How to visualize the voting choices in the moderator elections?
I'm trying to use Mathematica to create some visual representations of the votes cast in the recent Mathematica-StackExchange moderator elections. (Not the vote-counting system itself, OpenSTV, but ...
11
votes
1answer
325 views
Plotting graphics as ASCII plots
I'm occasionally in a situation where I have to use Mathematica on the terminal. I'd like to visualize the solutions I get from NDSolve, but when I use ...
8
votes
2answers
210 views
Transition between graphs
I want to visually demonstrate the manipulations made to a graph. For instance, I have a graph g where using the command ...
6
votes
1answer
229 views
How can I extend BinCounts to work on Times and Dates?
I want to extend BinCounts to work on a list of times or dates, binning them by Day, Week, Hour of the Month, Day of the Year, etc... So given a list of times and a time bin spec, I need to calculate ...
7
votes
4answers
202 views
How to remove ticks?
I wanted to remove the Ticks in my coding but i can't. Here when i try to remove the Ticks the number also gone. I need numbers ...
6
votes
2answers
163 views
Truncate TreeForm to show only the top
For some expressions, TreeForm may grow very long. I'm only interested in the top levels of the expression. How can I get the tree form of only the first levels an ...
3
votes
3answers
188 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.
...
0
votes
2answers
221 views
How can I make a transparent 3D Rectangle?
Sorry, I didn't mentioned clearly in my earlier post.
I want to build a transparent Rectangle, within which I want to diffuse a certain color of my choice which is ...
