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Questions tagged [data-visualization]

Questions relating to graphing and displaying the results of scientific computations.

3
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2answers
102 views

Recommended visualization tools for higher order finite element solutions?

Is there any software available which can directly render higher order finite element results? In particular, 3D finite elements would be preferable. It seems gmsh has some capability in this regard ...
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0answers
20 views

Which statistical method should I use for comparing machine run-time of two algorithms?

I am comparing the run-time of two algorithm by solving different instance of the problems. Sample of my data: ...
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1answer
72 views

Recreating this 3D density plot in ParaView

I want to do somethings similar to the plot found at the bottom of this blogpost, which I found via this post in ParaView, which seems to have been the original Application used to generate the plot. ...
0
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0answers
70 views

Using VTK how to do water flow representation

I am working on a project regarding retrofitting (in a virtual environment) using VTK and I have a point cloud data which is collected using a scanner from the area where I need to retrofit. I ...
0
votes
1answer
62 views

How to report non-monotonic runtimes in convergence plots

Let's say I have an algorithm that can be tuned by a parameter $h>0$ and is expected to converge as $h\to 0$. I want to study the computational complexity of this algorithm, i.e., how the ...
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0answers
310 views

3D visualization of the results of a 2D simulation in COMSOL

Considering that COMSOL forum is dead and CFD-online is not responsive, I'm gonna try asking my question here: I have done a 2D simulation in COMSOL multiphysics. I have two independent variables x ...
0
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1answer
115 views

How to create an optimal pizza delivery plan and how to visualize it

This question is quite open, and the actual problem comes from something you would probably consider an everyday niche (something you'd probably take for granted without really thinking about it). ...
2
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2answers
333 views

In practice, what are the most useful ways to visualize 2d fluid flow, to tell what is happening in the simulation? Esp for verification and debugging

My simulation creates a 2d grid of vectors and scalars (EDIT of velocity, depth etc), at 60 frames per second. Is it correct? It looks sort of right... but who knows? How can I tell what's happening - ...
1
vote
1answer
301 views

2d slice cut of tetrahedral mesh in tecplot 360 ex [closed]

I have made a 2d slice cut of a 3 dimension figure. When I select "mesh" to display the mesh on the slice, tecplot seems to connect the vertices in a strange way (it seems like two 2d meshes are ...
3
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2answers
278 views

Can mainstream 3D software be a useful alternative in scientific visualisation?

I hope this is not a vague question. I would like to know if any researchers and students in this community have used or considered using 3D graphics software (such as Blender) or a game engine to ...
0
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3answers
232 views

How to plot a price level matrix in Matlab?

I have a matrix P of m rows and n columns. P(i,j) contains the price of occupying position i at time j. I want to plot this in Matlab but in a way to get some kind of density plot with different price ...
9
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3answers
866 views

Second order tensor field visualization software

Is there an overview available over tensor visualization software? My personal preference is: A software which is free, well documented, and offers visualization techniques for different physical ...
0
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3answers
88 views

Software recommendation for plotting data from lab tests

I have several files of data created by LabView of hydraulic pressure testing over the course of a few days. This data is mostly time with various pressure and temperature measurements. Can you ...
1
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1answer
491 views

Is there a single C++ IDE packed with necessary scientific libraries for computing purpose?

I am basically looking for a good open source C++ IDE with scientific and visualization libraries built in. Can any one suggest few projects?
2
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1answer
193 views

Creating a 3D spatial density map from simulation results

I want so visualize the spatial density for my simulation. The result of my simulation is a (time-dependent) system of large number (~100k) of moving particles in a confined space. Each particle has ...
3
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0answers
308 views

C60 orbital calculation

I am currently trying to reproduce the results published by Hands et al.1 using MATLAB. They calculated the bases of the C60 wave functions of HOMO, LUMO and LUMO+1. I did the following: I ...
3
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0answers
33 views

Is there a library which allows for converting 4D implicit surfaces to simplexes?

I have a 4D surface in the form of the spin quadric. I would like to display this surface onto the screen. One of the method which I would like to use to present surface onto the screen is projection. ...
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0answers
151 views

Visualization of solution for a MAC grid

So I implemented the projection method as in Chorin (1969) for the solution of the Navier-Stokes Equations with the Boussinesq Approximation, using a 2nd Order accurate FD scheme. The primitive ...
0
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0answers
380 views

3D animation of a vector field (ParaView) [duplicate]

I am trying to create an animation of a 3d vector field in ParaView. All my data is in three matrices (201 x 201 x 201) corresponding to vectors components in x,y,z directions. And it's calculated in ...
5
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4answers
7k views

Visually appealing ways to plot singular vector fields with matplotlib or other foss tools

What is the best way to get a visual appealing plot of a singular vector field (if you want to visualize also the field strength). As an example I am playing with the electric fields of two point ...
3
votes
1answer
4k views

Plot a surface from data sets in MATLAB

I tried to plot a surface in MATLAB but, since it is the first time I had to do something like this, I need a confirmation on the process I followed because it is important for my project to plot the ...
0
votes
1answer
81 views

Rendering Huge Data with Renderman Interface Bytestream

I have tones of geometrical objects (spheres, meshes) I want to render: One way would be to first write a .rib file which could be certainly done and then push that file to a renderman compliant ...
1
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1answer
608 views

VTK File: How do I save data on a cell face?

I am writing a program that creates a vtk file with a Rectilinear Grid. I am able to save data to each one of the cells using CELL_DATA, but now, I need to save data to each one of the cell faces (x6)....
4
votes
1answer
1k views

Unwrap cylinder to plane in Paraview

I want to extract the data from the boundary surface of a cylinder (in a .vtu file) and plot it onto a plane, where the coordinates are theta (rotation angle) and Z(...
4
votes
2answers
1k views

Line Integral Convolution (LIC) Requirements

I'm trying to plot some vector fields using LIC technique. More specifically, I'm using the Python solution for this kind of plot. Before applying that approach, I was plotting my vectors as quiver. ...
1
vote
1answer
56 views

Visualizing certain sets

I'm not sure if this question is appropriate for this site, so I appologize in advance if it's not. For the purpose of a certain project I am working on, I would like to have the following sets ...
8
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4answers
486 views

Should I use a database to handle large amounts of results?

Background: I am currently running a large amount parameter variation experiments. They are being run in Python 2.6+, using numpy. These experiments are going to take about 2 weeks to run. Roughly I ...
1
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1answer
2k views

WRL and VRML to Matplotlib/Numpy

I would like to import (or parse ??) a WRL/VRML file format in python in order to work the data with Matplotlib. Is there any way of converting this file format into plottable numpy arrays ? I ...
2
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2answers
1k views

visualization of 3D probability flow

I have a master equation for $P(N_A^+,N_B^+,N_C^+,t)$, with $N_A^+,N_B^+,N_C^+$ all discrete. The numerical integration is done by this Matlab program using Euler's method. Despite the crude Euler's ...
0
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1answer
84 views

Plotting 3d dimensional histogarm in a spatial grid

Is there any tool to plot 3d dimensional histogram in a spatial grid? Preferably are there any filters or operators in Paraview or Visit for this?
6
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3answers
5k views

Visualizing finite element solutions in MATLAB

On my triangular mesh, I have the $(x,y,z)$ coordinates of each vertex of each triangle. For higher order elements, I refine each element a few times so I have more points to work with. If I just need ...
1
vote
1answer
86 views

How to interpret Turing Machine illustrations on p79 of Stephen Wolfram's “A New Kind of Science” book?

I am reading Stephen Wolfram's "A New Kind of Science". At present, I cannot understand how the cellular automata illustrations on p79 are created. In the patterns, the active cell, representing the ...
11
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4answers
10k views

How do I calculate the numerical difference between two fields stored in two different VTK files with the same structure?

Suppose I have two VTK files, both in structured grid format. The structured grids are the same (they have the same list of points, in the same order), and there is a field, call it "Phi", in each VTK ...
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2answers
2k views

Converting VTK point dataset of scalar values to a smooth surface

Does Paraview or Visit have any filters to draw a smooth surface for a set of points?
3
votes
1answer
216 views

Is there an Implementation of the Hilbert curve from $[0,1]$ to $[0,1]^n$, where $n$ is large? ($n=10,000$, say)

I would like to map each point in $[0,1]$ to $[0,1]^n$ with a Hilbert curve, where $n=10,000$. That is $$ f: [0,1] \to [0,1]^n, $$ is the $n$-dimensional Hilbert curve. I found the library of Cortesi,...
3
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4answers
513 views

Finding a molecular dynamics visualization library for C

I asked this question over at stackoverflow, and got blasted for it. I am currently working with legacy MD code written in C that my university uses, and haven't moved to a more modern library like ...
6
votes
3answers
7k views

Python scripting in Paraview

I've been using the basic visualization features of Paraview. Now, I want to go further by writing python macros to handle some specific tasks. My question for the advanced users: Are there any ...
3
votes
1answer
100 views

Equal Area Sampling on Curved Surface:

I have a quantity $\beta(\mathbf{x}) \in \mathbb{R}$ that I wish to compute on a curved, smooth surface defined by $\{\mathbf{x}: \Gamma(\mathbf{x})=0\} \subset \mathbb{R}^{3}$. (This surface is ...
17
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2answers
9k views

Binary vs. ASCII file size

I need to write some data from a computation, that will be read later by Paraview (.vtu or vtk file). When it comes to file size , should I go for the ASCII format or the Binary format ?
4
votes
2answers
1k views

VTK file format to image file

Is there a way to convert vtk file without visualizing into a image file such as png in the bash terminal itself? I have found that for the vtk files that I visualize to take longer time than its ...
0
votes
1answer
624 views

Setting background image with respect to a point in Paraview

How to set image with respect to a point in Paraview? I have a vtk file within a rectangular domain starting with the lower left point -1842,10000, I want to set a background image whose lower left ...
3
votes
2answers
446 views

VTK: Subset of Points with same color

I have a set of points, among which a subset needs to have the same color in vtk file format. For ex. all agents with table value 0.0, 0.0, 0.0, 0.0 will have same color. Here is my vtk ...
2
votes
2answers
1k views

Best VTK visualizing software?

I have a large VTK file with rectangular data, it seems Paraview cannot handle the size of the file, so it crashes and Visit navigation is extremely slow? Can anyone point me to good open source ...
5
votes
2answers
139 views

Which visualisation software for a layered graph?

I have produced a CSV file in the following format: ...
7
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2answers
3k 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 ...
5
votes
1answer
6k 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 ...
4
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2answers
10k 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: ...
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1answer
2k 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
678 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
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1answer
85 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 ...