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

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26
votes
2answers
2k views

Trying to Visualize a Collatz - The Collatz conjecture

I happen to have this collatz collatz[x_, y_] := If[x == 3*y || x == 2*y + 1 || y == 3*x || y == 2*x + 2, 2, 0] So i want a visual 3D adjacency graph of my ...
4
votes
1answer
86 views

Why does TreePlot ignore the vertex labels in a TreeGraph argument?

Example (watch the vertex labels): aTree = TreeGraph[{"a" -> "b", "a" -> "c"}, VertexLabels -> "Name"] ...
4
votes
3answers
172 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 ...
1
vote
1answer
79 views

Powerset Animation/Invisible Vertices/Graph Layout

I wanted to visualize the cumulative powerset construction process and came up with two functions: ...
8
votes
2answers
424 views

Creating a hyperlink graph from Wikipedia

This goes out to all the Mathematica experts - I'm hoping to get some helpful comments, ideas or code for that matter. In my attempts to maximize learning efficiency I had the idea to create an (...
1
vote
0answers
60 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 ...
9
votes
1answer
233 views

Possible improvements to this Syracuse (3x+1)/2 graph?

This algorithm produces the Syracuse disjoint tree graph without any duplicates. No need for Union, For, and ...
6
votes
1answer
412 views

Efficiently find all connected subgraphs

Is there a way to generate all the connected subgraphs of a graph in mathematica without going through all the subsets of the nodes and checking if the subgraph is connected (which will be O(2^N)*O(...
1
vote
2answers
91 views

Avoiding overlap in rendering of GraphPlot

I'm trying to visualize some 'graphs' (i.e. the mathematical objects with nodes and edges) using GraphPlot[]. I am defining the nodes using objects such as ...
6
votes
0answers
65 views

VertexDelete not working on graph with VertexWeight

Bug introduced in 10.0 and fixed in 10.3 Good afternoon, I have observed an "unexpected behaviour" with VertexDelete and a graph with vertex weights. This is a minimal working example: OK ...
6
votes
1answer
94 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
83 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 ...
3
votes
1answer
123 views
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: ...
3
votes
2answers
75 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: ...
8
votes
1answer
219 views

Enforce graph symmetry

I am using ...
14
votes
1answer
154 views

Question about TransitiveReductionGraph

Bug introduced in 10.0 and persisting through 10.4 Note: TransitiveReductionGraph is new in 10.0. In Mathematica 10.0 and 10.1, according to the documentation ...
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 ...
-2
votes
1answer
59 views

FindShortestPath does not work

The FindShortestPath doesn't work in this graph, can someone tel me what's wrong? ...
2
votes
1answer
272 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
76 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?
3
votes
1answer
152 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, $\mathscr{G}_{\Huge\cdot}$ ...
2
votes
3answers
205 views

How to rotate a complete graph without image rescaling while rotating

How do I rotate the following image? ...
1
vote
1answer
74 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 ...
7
votes
3answers
342 views

Test if directed graph is connected

Is there a simple built-in way to check if a directed graph is connected? Now, before you throw ConnectedGraphQ or ...
1
vote
1answer
205 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.
6
votes
1answer
109 views

Why are SetProperty and PropertyValue not working here?

I have a very simple graph, a loop: ...
5
votes
2answers
163 views

How to manipulate graphs without losing properties like EdgeWeight?

Let's say I have a weighted graph, ...
8
votes
3answers
478 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 "...
4
votes
2answers
182 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 ...
0
votes
1answer
105 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
105 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 ...
8
votes
0answers
277 views

How to generate a random flow graph?

A flow graph is a rooted directed graph that the root reaches all other vertices. I need to generate a random flow graph in Mathematica. My idea is to use ...
1
vote
0answers
37 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
87 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
64 views

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

I find VertexLabels -> "Name" a strange setting to achieve graph nodes labeled by their index: ...
0
votes
0answers
116 views
1
vote
0answers
45 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 ...
3
votes
0answers
182 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 ...
1
vote
1answer
237 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
93 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
162 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 ...
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... ...
-3
votes
1answer
101 views

How to draw phase portrait graph for nine system of differential equations in mathematica? Can have a code for darwing this? [closed]

The differential equations for the transmission dynamics of HIV/AIDS are given as follows: ...
3
votes
2answers
180 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
185 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 ...