Wolfram Function Repository
Instant-use add-on functions for the Wolfram Language
Function Repository Resource:
Compute the Wolfram–Hausdorff dimension of a graph and its associated properties
ResourceFunction["WolframHausdorffDimension"][graph,v] computes the Wolfram–Hausdorff dimension around vertex v in a graph graph, with an automatically-computed maximum ball radius. | |
ResourceFunction["WolframHausdorffDimension"][graph,v,rad] uses the maximum ball radius rad. | |
ResourceFunction["WolframHausdorffDimension"][graph,v,{radmin,radmax}] uses minimum ball radius radmin and maximum ball radius radmax. | |
ResourceFunction["WolframHausdorffDimension"][graph,dim,All] gives an association showing the Wolfram–Hausdorff dimensions around each vertex in a graph graph, with an automatically-computed maximum ball radius. | |
ResourceFunction["WolframHausdorffDimension"][graph,dim,All,rad] gives an association using maximum ball radius rad. | |
ResourceFunction["WolframHausdorffDimension"][graph,dim,All,{radmin,radmax}] gives an association using the minimum ball radius radmin and maximum ball radius radmax. | |
ResourceFunction["WolframHausdorffDimension"][…,"prop"] gives the property "prop" for the specified Wolfram–Hausdorff dimension computation. |
"Volume" | the volumes of geodesic balls of various radii around a given vertex |
"AllVolumes" | an association showing the volumes of geodesic balls of various radii around each vertex |
"Dimension" | the Wolfram–Hausdorff dimension at a given vertex |
"AllDimensions" | an association showing the Wolfram–Hausdorff dimension at each vertex |
"HighlightedGraph" | a highlighted graph depicting how the Wolfram–Hausdorff dimension is computed |
"TransitivelyReduce" | False | whether to use the transitive reduction of the input graph |
"UndirectedGraph" | False | whether to use the undirected form of the input graph |
"VolumeMethod" | Mean | whether to take a maximum, minimum or mean over geodesic balls of different volumes (or simply return all values) |
"DimensionMethod" | Mean | whether to take a maximum, minimum or mean over geodesic balls yielding different dimensions (or simply return all values) |
"VertexMethod" | Identity | whether to take a maximum, minimum or mean over all vertices in the input graph (or simply return all values) |
Compute the Wolfram–Hausdorff dimension at vertex 150 in a 20-by-20 2-dimensional grid graph:
In[1]:= |
|
Out[1]= |
|
In[2]:= |
|
Out[2]= |
|
Compute the maximum and minimum curvatures over geodesic balls with radii up to 8:
In[3]:= |
|
Out[3]= |
|
In[4]:= |
|
Out[4]= |
|
Return a list of all dimensions for geodesic balls with radii up to 8:
In[5]:= |
|
Out[5]= |
|
Show the geodesic balls with radii up to 8 as a highlighted graph:
In[6]:= |
|
Out[6]= |
|
Return an Association showing the Wolfram–Hausdorff dimension at each vertex:
In[7]:= |
|
Out[7]= |
|
Compute the maximum and minimum dimensions across all vertices:
In[8]:= |
|
Out[8]= |
|
In[9]:= |
|
Out[9]= |
|
Compute the average dimension across all vertices:
In[10]:= |
|
Out[10]= |
|
Compute the average volume of geodesic balls around vertex 250 in a 10-by-10-by-10 3-dimensional grid graph:
In[11]:= |
|
Out[11]= |
|
In[12]:= |
|
Out[12]= |
|
Compute the maximum and minimum volumes of geodesic balls with radii between 3 and 9:
In[13]:= |
|
Out[13]= |
|
In[14]:= |
|
Out[14]= |
|
Return a list of volumes of geodesic balls with radii between 3 and 9:
In[15]:= |
|
Out[15]= |
|
Show the geodesic balls with radii between 3 and 9 as a highlighted graph:
In[16]:= |
|
Out[16]= |
|
Return an Association showing the geodesic ball volumes around each vertex:
In[17]:= |
|
Out[17]= |
|
Compute the maximum and minimum ball volumes across all vertices:
In[18]:= |
|
Out[18]= |
|
In[19]:= |
|
Out[19]= |
|
Compute the average ball volume across all vertices:
In[20]:= |
|
Out[20]= |
|
Compute the Wolfram–Hausdorff dimension at an arbitrary vertex in an approximately 3-dimensional graph (produced using the resource function FlatManifoldToGraph):
In[21]:= |
|
In[22]:= |
|
Out[22]= |
|
Show the geodesic balls with radii up to 3 as a highlighted graph:
In[23]:= |
|
Out[23]= |
|
Compute the Wolfram–Hausdorff dimension at an arbitrary vertex in an approximately 4-dimensional graph (produced using FlatManifoldToGraph):
In[24]:= |
|
In[25]:= |
|
Out[25]= |
|
Show the geodesic balls with radii up to 3 as a highlighted graph:
In[26]:= |
|
Out[26]= |
|
If given a graph, WolframHausdorffDimension returns an Association showing the Wolfram–Hausdorff dimension at each vertex, using the graph radius as the maximum geodesic ball radius:
In[27]:= |
|
Out[27]= |
|
In[28]:= |
|
Out[28]= |
|
Use geodesic ball radii between 3 and 5 instead:
In[29]:= |
|
Out[29]= |
|
If given a graph, a vertex and a maximum radius, WolframHausdorffDimension returns the Wolfram–Hausdorff dimension at that vertex:
In[30]:= |
|
Out[30]= |
|
WolframHausdorffDimension also supports directed graphs:
In[31]:= |
|
In[32]:= |
|
Out[32]= |
|
In the directed case, the Wolfram–Hausdorff dimension is computed using volumes of geodesic cones, as opposed to geodesic balls:
In[33]:= |
|
Out[33]= |
|
However, WolframHausdorffDimension can be made to treat directed graphs as though they were undirected (and hence revert to using geodesic balls) with the option "UndirectedGraph":
In[34]:= |
|
Out[34]= |
|
In[35]:= |
|
Out[35]= |
|
WolframHausdorffDimension also supports dimension computations in graphs with non-integer dimensionality, such as this Sierpinski sieve graph:
In[36]:= |
|
Out[36]= |
|
In[37]:= |
|
Out[37]= |
|
In[38]:= |
|
Out[38]= |
|
Compute the average Wolfram–Hausdorff dimension for geodesic balls around vertex 150 with radii between 3 and 9 in a 20-by-20 2-dimensional grid graph with the option value "DimensionMethod"→Mean (default):
In[39]:= |
|
Out[39]= |
|
In[40]:= |
|
Out[40]= |
|
Return a list of all dimensions for geodesic balls with radii between 3 and 9 instead:
In[41]:= |
|
Out[41]= |
|
Compute the maximum and minimum dimensions for geodesic balls with radii between 3 and 9 with the option values "DimensionMethod"→Max and "DimensionMethod"→Min, respectively:
In[42]:= |
|
Out[42]= |
|
In[43]:= |
|
Out[43]= |
|
By default, directed graphs are not transitively-reduced:
In[44]:= |
|
Compute (and visualize) the Wolfram–Hausdorff dimension, assuming that the graph is not transitively-reduced:
In[45]:= |
|
Out[45]= |
|
In[46]:= |
|
Out[46]= |
|
WolframHausdorffDimension can be made to treat unreduced directed graphs as though they were transitively-reduced with the option "TransitivelyReduce":
In[47]:= |
|
Out[47]= |
|
In[48]:= |
|
Out[48]= |
|
By default, directed graphs are treated as directed (and so dimension computations use the volumes of geodesic cones, as opposed to geodesic balls):
In[49]:= |
|
Compute (and visualize) the Wolfram–Hausdorff dimension, assuming that the graph is directed:
In[50]:= |
|
Out[50]= |
|
In[51]:= |
|
Out[51]= |
|
WolframHausdorffDimension can be made to treat directed graphs as though they were undirected with the option "UndirectedGraph":
In[52]:= |
|
Out[52]= |
|
In[53]:= |
|
Out[53]= |
|
Return an Association showing the geodesic ball volumes around each vertex in a 20-by-20 2-dimensional grid graph (default):
In[54]:= |
|
Out[54]= |
|
In[55]:= |
|
Out[55]= |
|
Compute the average ball volume across all vertices with the option value "VertexMethod"→Mean:
In[56]:= |
|
Out[56]= |
|
Compute the maximum and minimum ball volumes across all vertices with the option values "VertexMethod"→Max and "VertexMethod"→Min, respectively:
In[57]:= |
|
Out[57]= |
|
In[58]:= |
|
Out[58]= |
|
Return an Association showing the Wolfram–Hausdorff dimension at each vertex in a 20-by-20 2-dimensional grid graph (default):
In[59]:= |
|
Out[59]= |
|
In[60]:= |
|
Out[60]= |
|
Compute the average dimension across all vertices with the option value "VertexMethod"→Mean:
In[61]:= |
|
Out[61]= |
|
Compute the maximum and minimum dimensions across all vertices with the option values "VertexMethod"→Max and "VertexMethod"→Min, respectively:
In[62]:= |
|
Out[62]= |
|
In[63]:= |
|
Out[63]= |
|
Compute the average volume of geodesic balls around vertex 150 with radii between 3 and 9 in a 20-by-20 2-dimensional grid graph with the option value "VolumeMethod"→Mean (default):
In[64]:= |
|
Out[64]= |
|
In[65]:= |
|
Out[65]= |
|
Return a list of volumes of geodesic balls with radii between 3 and 9 instead:
In[66]:= |
|
Out[66]= |
|
Compute the maximum and minimum volumes of geodesic balls with radii between 3 and 9 with the option values "VolumeMethod"→Max and "VolumeMethod"→Min, respectively:
In[67]:= |
|
Out[67]= |
|
In[68]:= |
|
Out[68]= |
|
This work is licensed under a Creative Commons Attribution 4.0 International License