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

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6
votes
1answer
91 views

Graph: Coloring Edges individually

CODE: Graph[{Style[0 -> 1, Red], Style[0 -> 1, {Blue, Dashed}]}] This mathematica code will make both lines solid Red, since they belong to the same two ...
5
votes
1answer
80 views

RandomGraph with specific constraints

I need to generate random connected simple graphs (no loops) with the constraint that exactly two vertices must only have a single edge. I can create many connected graphs (but very few will have the ...
0
votes
0answers
40 views

Create graph K5, delete 2 edges and 2 vertex, create adjacency matrix [duplicate]

I need help about this problem. I should create graph K5, delete 2 edges and 2 vertex from it and from the new graph create adjacency matrix. I have poor knowledge and i don't need anyone to solve the ...
2
votes
1answer
89 views

DeleteVertex in Kpartite graph

How can i make K7,2 graph and how can i delete 2 vertex? Btw, i need to use package -> Combinatorica`; I tried this: ...
2
votes
2answers
72 views

Graph not drawing after VertexDelete

I'm very new to Mathematica and am currently trying the VertexDelete function, but after using it, my graph isn't drawing. Input: ...
3
votes
1answer
86 views

How to use the edge routing of LayeredDigraphEmbedding when specifying explicit vertex coordinates?

The "LayeredDigraphEmbedding" GraphLayout uses an edge routing algorithm which produces nice and readable diagrams and curved ...
7
votes
3answers
337 views
3
votes
1answer
149 views

Can I make a simple game in Mathematica?

Here is the game outline: $\hspace{2.5cm}$ There is one player. The player ($\mathscr{L}$) moves from node to node limited by the directed arrows. As the player moves, $\mathscr{G}_{\Huge\cdot}$ ...
1
vote
0answers
127 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 ...
-2
votes
1answer
58 views

FindShortestPath does not work

The FindShortestPath doesn't work in this graph, can someone tel me what's wrong? ...
2
votes
1answer
244 views

How do I get the adjacency Matrix from a random graph [closed]

I am using the command g = RandomGraph[{8, 13}]; GraphPlot[g, VertexLabeling -> True] to plot a random graph with n nodes and l edges. Once the program has ...
3
votes
1answer
75 views

Efficient Implementation of Resistance Distance for graphs?

Is there an implementation of the resistance distance matrix (or just resistance matrix) for graphs available in Mathematica?
1
vote
1answer
73 views

Constructing an I-graph

I am attempting to build I-graphs in MMA, i.e. the non-Generalized Petersen graphs, and I found some code from Eric Weisstein, but this is now outdated and doesn't run. I have attempted to switch the ...
3
votes
0answers
180 views

How can I scrape the social network for a subset of users in Twitter?

Clearly one cannot scrawl the entire network... but I'd like to extract a statistically representative sample from the network. More specifically, I'd like to access the graph induced by scraping the ...
0
votes
1answer
197 views

Displaying a bipartite graph in Wolfram Mathematica

Which is the function that can plot me the bipartite graph $K_{7, 2}$ in Mathematica? And after that to delete 2 edges?? Thanks for the help.
4
votes
2answers
175 views

Limit FindMinimumCostFlow function to one vertex per path

I want find a set of paths through a graph that maximise flow and minimise cost set on each Edge. However, I have an additional constraint where each Vertex can only be visited once. Mathematica has ...
1
vote
2answers
139 views

Find all perfect matchings of a Graph

I'm trying to find all perfect matchings for some bipartite graphs. For example ...
6
votes
1answer
102 views
5
votes
2answers
148 views
8
votes
3answers
470 views

How to remove all dead ends from a undirected graph?

so what I want to do is take an undirected graph, and remove all the "dead ends" (that is, vertices that are attached to only one other vertex), but do it in such a way that it does it until reaches ...
0
votes
1answer
103 views

Cannot find a way to display an adjacency matrix [closed]

I have a question about face adjacency graphs. Suppose that I have an adjacency matrix How can I plot something like this?? I tried and it looks too messy. What may be the resulting graphic? Thank ...
1
vote
1answer
68 views

Graph Edit Distance with Mathematica?

Is there any way to calculate similarity of graphs or the graph edit distance in Mathematica ?
2
votes
0answers
50 views

Custom graph distribution

I am working with random graphs a lot. It's quite easy to describe random graph using, adjacency matrix or just a list of edges. However I am thinking that I might benefit from describing random ...
1
vote
1answer
103 views

Finding adjacency matrix of a Mathematica's in-built graph? [closed]

I want to get the adjacency matrix of an in-built graph, say the dodecahedral graph. Naively using AdjacencyMatrix[Dodecahedral] doesn't give it to me. Any ...
1
vote
0answers
36 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: ...
1
vote
0answers
85 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 ...
2
votes
1answer
59 views

Logic behind Graph[edges, VertexLabels -> “Name”]?

I find VertexLabels -> "Name" a strange setting to achieve graph nodes labeled by their index: ...
9
votes
4answers
308 views

Multiple Forms of Transportation Between Cities

I want to be able to show different connections between cities based on modes of transportation. For instance, you could walk to any city, but it would take a long time, you could take a train, but ...
1
vote
0answers
43 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 ...
7
votes
1answer
230 views

How to set the Y coordinates for a Graph with defined X coordinates to prevent overlap of nodes?

I would like to draw a Graph with defined $x$ coordinates and variable node sizes. If I simply replace the $x$ coordinates of a graph, then nodes can overlap and ...
1
vote
1answer
233 views

Getting coordinates of a embedded graph [closed]

I have to show how spring embedding works by displaying step-by-step images of a GridGraph[10x10] being embedded from a initial circular form to the final form, which should look somewhat like this: ...
0
votes
1answer
92 views

Import mixed graph from Excel

I am new to Mathematica. I want to use the software as it allows analysis of mixed graphs (directed and undirected edges). I have my network as an Excel spreadsheet of three columns: source, target ...
2
votes
1answer
157 views

Plot a tripartite Graph with its groups separated

I would like to create a Graph like the following: but without edges between vertices in the same group. so I have a graph and I want to plot it such that its ...
5
votes
2answers
374 views

Using GraphData to generate all directed graphs with n vertices

Using Combinatorica, it was possible to generate unlabeled (non-isomorphic) directed graphs of $|V|=n$. Here the example is for $n=4$: ...
0
votes
2answers
81 views

Question RE DiscreteMarkovProcess Graph Labels

I'm trying to label the arc's of my Markov chain with symbols like $\alpha$, $\beta$, etc., to show how the Markov chain looks abstractly. So, I did this... ...
6
votes
2answers
486 views
8
votes
2answers
411 views

Finding All Chordless Simple Cycles In A Graph

I am doing a research on networks which consists of polygons with different number of sides. I am trying to find all simple cycles in a network which are chordless. As an example, consider the ...
3
votes
2answers
177 views

How to create a recursive TreeGraph

How could I create a recursive tree graph, such as one defined by the following: A family of trees $T_n$ are defined recursively as follows, for all integers $n \ge 1$. The tree $T_1$ consists of a ...
2
votes
3answers
183 views

How can I get from a list of characters representing a permutation to graphics showing the cycles?

I am trying to graphically represent cycles in various permutations of the alphabet, and have a question in two parts. I have ...
1
vote
0answers
78 views

Better layout for large a directed graph?

This shows a directed graph for an iterated n-bit pseudo-random function parameterized by s. ...
8
votes
2answers
4k views

How to find the Shortest Path, visiting ALL vertices, without coming back to the start (Hamiltonian Path, minimum distance)

A car has to pick up each person and take them to their destination. I am trying to find the shortest tour that will do this. How can I find the shortest path between any s and t.... visiting all ...
0
votes
1answer
121 views

How to input an adjacency list?

I am a beginner user of Mathematica, and I have an assignment to construct a graph given n (number of vertices) and an adjacency list. My idea was to make a For cycle that repeats n times, and for ...
1
vote
0answers
86 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 ...
0
votes
0answers
24 views

How to make the vertices move with the VertexRenderingFunction graphics when clicking and dragging vertices of a layered graph [duplicate]

I have read the suggested similar question here: VertexRenderingFunction (or EdgeRenderingFunction) with movable nodes? and Mr. Wizard's solution. Please could someone help me to apply his method to ...
0
votes
1answer
134 views

Import GEXF graphs into Mathematica?

Is there any smart way to import gephi graphs (*.gexf) into mathematica ? I mean other than converting to *.gml.
3
votes
0answers
59 views

Undocumented options for “BalloonEmbedding” in GraphLayout

From an error message, I see some options of the BalloonEmbedding method for GraphLayout: ...