Questions relating to graphing and displaying the results of scientific computations.
6
votes
2answers
69 views
Is there a fast way to compute histograms for high-dimensional large datasets?
Currently the way I compute histograms for data is by generating grid in $N$ dimensions (where $N$ is the dimension of the data) and searching through the $M$ data points in each dimension to see in ...
2
votes
0answers
90 views
How to generate sloped streamslice plot of magnetic field in Matlab
I am currently working on my bachelor thesis, where I am calculating trajectory of electrons and ions in Hall Effect Ion Thruster. However, to be sure what I am calculating, I need to know how does ...
3
votes
1answer
136 views
plotting a 2D animated data surface on MatPlotLib
I'm trying to get an animated 2D data surface on MatPlotLib. After a bit of search on the internet, i've found an example that almost works:
...
1
vote
1answer
52 views
matlab set center of output figure to [0 0 0]
I have a few set of data of three dimensional matrices, n x 3 with x, y and z coordinates.
I viewed the matrices in the figure window.
...
3
votes
1answer
84 views
How to do local FFT on huge 3D vector data cell mesh and visualize it spatially?
Simulation type:
I'm running a simulation with the OOMMF micromagnetics package
http://math.nist.gov/oommf/
where are magnet is represented by a mesh of 3 million cells, it gets excited by a ...
0
votes
0answers
69 views
Tecplot: Overlapping of 2 contour plot data from a single file, in a 2D Cartesian grid
I have a rectangular grid ASCII .dat file that looks like this
...
0
votes
1answer
25 views
mapping data with a spike to a heat map
I have the following dataset that I need to display on the heat map:
[30, 15, 66, 7, 9999, 78, 42, 132]
So if I map the values to the color scale using a linear function I only see the spike while ...
0
votes
2answers
114 views
CAD like visualisation of 3D vector data?
It looks like MATLAB and Mathematica is often used for post-processing and data visualization of 3D vector data.
Now consider you are simulating 3D objects and get out gradient fields etc., is there ...
3
votes
1answer
69 views
Looking for parMetis visualizer?
Is there any visualizer for parMetis (mpmetis), which can visualize FEM mesh grids after partitioning?
15
votes
4answers
358 views
Visualizing very large link graphs
I am looking for a tool to visualize very large directional link graphs.
I currently have ~2million nodes with ~10million edges. I have tried a few different things, but most take hours to even do ...
4
votes
0answers
69 views
Existing software/scripts for spiral graphs?
I am looking for existing software or scripts to generate spiral graphs from cyclical (time) data, as presented by Webber and Muller. The graphs shown in the paper look like a great means of ...
7
votes
1answer
174 views
Generalized least squares gradient of a vector field
For computing the gradient of a scalar field, one can use the weighted least squares method as described in the paper Revisiting the Least-squares Procedure for Gradient
Reconstruction on Unstructured ...
6
votes
2answers
197 views
Tools for computing an electric field based on location of charges?
I have the positions of a large number of charges (the strengths are known, but are also variables). Are there any tools that will allow me to visualize the electric field induced by these charges (or ...
1
vote
1answer
85 views
Error message when trying to get PETSc to draw to an X terminal by passing -mat_view_draw
I've made a matrix, and now I want to draw it on the screen to make a basic check of correctness. The documentation for MatAssemblyEnd() states that I can pass an ...
3
votes
2answers
878 views
Can gnuplot's PNG terminal use superscripts and subscipts?
I know that gnuplot's epslatex terminal can display superscipts and subscripts in titles and label axes. Is this also possible when using gnuplot's ...
19
votes
11answers
2k views
Which software and workflow is recommend for publication of scientific data and graphs?
Which software provides a good workflow from simple plotting of a few datapoints up to the creation of publication level graphics with detailed styles, mathematical typesetting and "professional ...
5
votes
4answers
744 views
Tools for visualizing large 3D volumes
I have a sequence of 2D images (png files) encoding the partitioning (segmentation) of a large biological 3D volume. In these files, each pixel has a color, representing the 3D object the pixel ...
8
votes
1answer
107 views
Given values on a mesh, what algorithm can I use to construct efficiently level set contours?
I have a mesh, faces $F$, edges $E$, and vertices $V$, and I have a list of predefined level set contours.
What algorithm can I use to construct contours in the most efficient manner?
A plot of ...
4
votes
5answers
590 views
How can I plot piece-wise defined function in some easily-accessed open-source tool?
I want to plot
$$f_{n}(x) = \begin{cases} x-n & \text{for } n \leq x \leq n+1 \\
2-x+n & \text{for } n+1\leq x \leq n+2 \\
0 ...
2
votes
1answer
92 views
How can I set different axes for different plots in gnuplot?
I want to plot a few sets of data points on the same x-axis that have different units. How can I set different axes for each incompatible quantity?
4
votes
5answers
347 views
How do I create an animation from a 2D model or dataset?
I found the following thread in the physics stackexchange where I saw the video called output attached to the main post. The video can be found here.
How would I go about creating such an animation?
25
votes
6answers
885 views
What attributes make a figure “professional-quality”?
I've heard people say that plots produced by ORIGIN tend to look polished and "professional," whereas plots produced by Mathematica do not. However, most plot-creation programs are quite configurable ...
