Questions about handling graphs in Mathematica, graph theory, graph visualization, GraphPlot, the built-in Graph type and the Combinatorica` package.

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71 views

How do I visualize the result of EdgeColoring[g]?

Combinatorica has a heuristic edge-coloring function EdgeColoring. When I execute it on a graph, the result is a list of integers. My guess is that an integer $i$ ...
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1answer
103 views

Connecting a vertex to middle of an edge with GraphPlot?

using GraphPlot I'd like to make directed arrow connecting a vertex (node) to the middle of an edge but couldn't find a way. Is this even possible using GraphPlot or other graphics-related commands in ...
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1answer
310 views

Vertex labels versus vertex names in VertexRenderingFunction

The VertexRenderingFunction seems to only use names, not labels. For example: ...
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1answer
150 views

Problem with GlobalClusteringCoefficient

I have a simple problem, I would like to measure the global clustering coefficient for a random graph. Here is my code: ...
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1answer
103 views

Is there a TwoColoring function of Graph object?

The following code shows the GraphUtilities package makes a problem for Graph object. I want to use a ...
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1answer
216 views

Do any users know of methods to capture Twitter feeds and subject them to analysis? [duplicate]

I would like to use the output of about 300 Twitter sources and would probably collect 30 minutes of tweets at a time and subject each collection to analysis; ideally this process would be automatic ...
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1answer
138 views

How can I stop DiscreteMarkovProcess[] from relabeling vertices?

I'm attempting to calculate the mean first passage time between two vertices, $v_1$ and $v_2$, provided some undirected graph $G$. However, I noticed that running the following script: ...
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1answer
250 views

Weighted Kirchhoff Matrix?

I have a weighted graph and I want its graph Laplacian matrix (what Mathematica calls the Kirchhoff matrix in the unweighted case). Is there an easy way to get this? For example, the command: ...
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1answer
192 views

EdgeRenderingFunction and Graph input output structure

I am trying to create an EdgeRenderingFunction but the more information does not help me at all as far as explaining what the ...
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0answers
54 views

GraphDistance gives incorrect result in weighted multigraph [on hold]

There are bugs in Graph on Mathematica 10.1. For example, ...
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0answers
41 views

reset the value of a variable [closed]

Folks, I have a problem in populating a matrix without overriding the values. After performing computations for various values for j, I want to store these values in following matrix. Here is the ...
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2answers
85 views

Graph generation from a non-paired edge list

The elements in e = {{6414, 6598, 6927}, {7, 1035, 2382, 6927}, …} are the graph nodes; for example, {6414,6598,6927} is ...
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34 views

Unexpected behaviors with Edge Weights

Noticed some bizarre behavior when subgraphing on weighted graphs, which probably extends to graphs with arbitrary edge properties. I construct a weighted graph with five edges, defining a specific ...
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30 views

ConnectedComponents problem of syntactic structure

In Mathematica 10, ConnectedComponent computes the list of vertices belonging to strongly connected components. In the following simple example with a graph with no edges, the result is as follows: ...
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68 views

Twilight Zelda Guardian Puzzle : Shortest Path Proof [closed]

I'm playing a video game right now and in it is a puzzle (see here). There are solutions to solving it (see here) on the Internet, but I'd like to know if this path is the shortest path (least amount ...
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0answers
31 views

DataRange not working in GraphPlot

I am trying to create a a GUI that uses the GraphPlot function to automatically generate graph vertices. I am using the VertexCoordinateRules option to designate that I want some of the vertices to be ...
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67 views

Better layout for large a directed graph?

This shows a directed graph for an iterated n-bit pseudo-random function parameterized by s. ...
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0answers
60 views

Better control of vertex positions in GraphPlot?

I am trying to graphically visualize a sort of a transformation network. My program generates a list of vertices and edges and I want to turn that into a visually clear graph fulfilling a few ...
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0answers
103 views

Draw mesh edge / map a graph to a mesh

I am doing a "force density" method to generate a mesh under certain load. The original mesh is like this: Then, I generate a IncidenceMatrix from the graph for further matrix transformation and ...
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0answers
57 views

Successive addition or deletion of vertices (or edges) in graph

I am trying to perform a kind of dynamic graph simulation where vertices and edges of graph are added and deleted according to the current state of the graph at each time step. I know that there are ...
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0answers
52 views

What do the default shapes/colors in DiscreteMarkovProcess Graph mean?

In making markov chains, I know how to do that, but I am curious as to what the different colors, and shapes of the vertexes in the graph output mean. as example; ...
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0answers
22 views

FindIndependentEdgeSet behaves differently in v9 and v10

The following code gets different output in v9 and v10. ...
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0answers
51 views

Purpose of VertexWeight

I am trying to partition a graph into partitions of equal weight (on the vertex). I looked at the documentation, and found VertexWeight, which seems to attach a weight to a vertex. In the details, ...
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0answers
71 views

Multi-named Vertices (or Overlapping Vertices) in TreePlot/LayeredGraphPlot, or Merging Trees

If there is a series of rules from which a TreePlot/LayeredGraphPlot is made: ...
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1answer
77 views

How to insert Tooltip into incidence plot?

I'm trying to make a graph using a file .NET extracted from a file .CSV and to make tooltiped the vertices' labels. Initially I ...
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0answers
39 views

Export format for graphs loses type information?

I have a situation where I am adding properties to vertices in my graph. In my case, I am adding a moduleId, which is an integer, and a kind, which is a string. I attach a weight to the edge as well. ...
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1answer
49 views

Having trouble using different options with GraphPlot [closed]

I am extremely new to Mathematica and I am trying to plot some graphs. GraphPlot[{1->2, 2->3, 3->1}] works just fine. But as soon as I try to use ...
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88 views

Is there a minor bug in Neal Alexander's TopologicalSortAll[]?

There is an amazing answer to this question: All possible topological orderings of a graph By Neal Alexander. However, as user "dark blue" (I am not this user) notes: ...
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0answers
57 views

Finding optimal inclusion cutoff to define subgraph of a “large” weighted graph

I have a weighted graph G with ~2.5K vertices and ~250K edges. (The edge weights are all in (0, 1), and the weight of each vertex is derived as the maximum of the ...
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0answers
71 views

Spread multiple edges by a specified scaled distance (Mathematica 10)

Is there way to spread multiple edges by a specified scaled distance for Graph function in Mathematica 10, something similar to MultiedgeStyle in GraphPlot for example, I would like to write: ...
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0answers
106 views

Using NMinimize to solve the Multi Commodity Flow problem

I have the following optimization problem and I was hoping to solve it with NMinimize. Unfortunately, I don't get the desired result. I would like to get an optimal vector for $d_{e}$. This is how ...
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0answers
132 views

Replace part in a matrix that matches specific pattern

I have the following problem. Given a matrix L which looks as follows, Matrix L is a link, route matrix. Further, I got the following vector (d), which indicates the demand per vertex combination. ...
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66 views

Request: Create a planar graph using Mathematica (at least v9) [closed]

Can someone please copy/paste the planar Graph given by Mathematica (at least v9) for this graph: ...
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0answers
284 views

Triangular lattice with periodic boundary conditions

I am trying to generate an equilateral triangular lattice with fixed vertices and periodic boundary conditions. I am supposed to assign an index (starting from 0) to each vertex in my lattice and then ...
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60 views

GraphPlot not working properly

The code ...
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80 views

Why does Network`GraphPlot`wrapper appear in my GraphPlot?

I'm making a GraphPlot of data similar to this: ...
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0answers
66 views

Get correlation matrix when using FindGraphCommunities

Does somebody know how to get the correlation matrix when using FindGraphCommunities (Social Network analysis) using the "Spectra" option? Can somebody tell me as ...
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1answer
84 views

Social Network Analysis - Get the List of InBoundEdges for Directed Graph

I wish to get the list of inwards edges for a node. IncidenceList provides both inwards and outwards list. I can of course filter with ...
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0answers
128 views

How to make Layer Directed Graphs (LDG) in mathematica?

I am wondering if I can make a graph like that somehow: I am new to mathematica, I tried to play with Creating a graph with variable size of vertices and variable thickness of edges . I figured if I ...
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265 views

How to extract connected bipartite graph from incidence matrix

I'm trying to extract a connected bipartite graph Bconn from the a given incidence matrix B- I have a matrix representing a bipartite graph - the incidence matrix B (weighted or not is unimportant). ...
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0answers
75 views

GraphHighlightStyle with multiple datasets

I am trying to highlight several subgraphs of a graph using the following command: ...
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0answers
141 views

Network problem of visualization of vertex

I have a question about visualization of network in Mathematica: for example: for this network g = ExampleData[{"NetworkGraph", "Friendship"}]; when we ...
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0answers
260 views

Get path to end nodes in directed (partially cyclic) graph

I have a large directed graph containing small loops. I would like to extract all paths to all end nodes (no VertexOutComponent) with a given path length $n$. I ...
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84 views

What algorithm is Mathematica using for FirstPassageTimeDistribution[]?

What algorithm is Mathematica 9 using for FirstPassageTimeDistribution[]? Is it attempting to use PseudoInverse[] on the ...
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0answers
105 views

Extracting Facebook Managed accounts (pages) in Mathematica? [duplicate]

I want to use Mathematica to explore various relationships on my Facebook pages. I've been able to successfully extract information on my personal Facebook page using the build in Social Media ...
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1answer
146 views

Using different colors in TreeForm?

I've used TreeForm, and I appreciate that the syntax is fairly short, especially in comparison with TreeGraph. Is it possible ...
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1answer
104 views

Network graph with lights not working

So I have ...
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1answer
89 views

Subgraph, HighlightGraph not acting as expected

I'm trying to create a simple graph from a matrix and then highlight a particular subgraph. My code (simplified from a bigger task) is as follows. I keep getting the "Subgraph::graph: A graph object ...
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2answers
279 views

How can I give graph required data with GUI?

Consider that I have the simple graph of ...
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2answers
346 views

How to specify VertexCoordinates as geographic coordinates of cities?

I have been very busy these days with giving the VertexCoordinates of the cities the geographic coordinates from ...