Tagged Questions

Questions on the cluster analysis functions of Mathematica, including the Hierarchical Clustering Package.

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242 views

Strategies to find curves on messy data using FindCurvePath

I have a set of data points that correspond to roots of a transcendental equation with respect to a parameter (the abscissa) which, by the properties of the system, define continuous curves (might be ...
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55 views

How many clusters does DominantColors return?

Is there any documentation on how it automatically chooses the number of colors - does it use X-means or some other heuristic to determine the number of clusters it automatically returns?
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49 views

Clustering with restrictions

I have this dataset of a ranking of roughly 32.5k players in increasing order. The third column contains the number of players which have the corresponding score, whilst the second is the number ...
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85 views

k-means clustering in parallel

How can the k-means algorithm for some given distance function be implemented using ParallelMap or other parallel processing program constructs in Mathematica?
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29 views

FindClusters and friends run out of memory

I have a 50k lists, each has 1024 real numbers and I wanted to cluster them, but then the kernel crashes from memory pressure: It crashes even with ...
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74 views

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78 views

How can I access the Criterion function of KI method in FindThreshold for a dataset?

I want to find a threshold for some data set, using Kittler-Illingworth minimum error thresholding method (KI method). To do so, I use the Mathematica built-in function ...
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140 views

How to get the SIFT features of an image?

According to the documentation, the function KeyPoints[] computes features only using SURF, but what about SIFT or FAST features?
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247 views

Max iterations in K-means clustering algorithm

I want to use k-means for clustering. I have used the ClusteringComponents function but I said how can I control the max-iteration for k-means ?
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114 views

Matrix clustering in Mathematica?

Suppose I have a square matrix $M$, which you can think of as the weighted adjacency matrix of a graph $G$. I want to order the vertices of $G$ in such a way that the entries of the matrix $M$ are ...
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77 views

k-means clustering using squared correlation in Mathematica

I am trying to cluster data using the squared correlation coefficient since in the case of my data, -1 correlation is equivalent to 1 correlation (polarities do not matter). How can this be done in ...
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35 views

Where can I find documentation on the methods/algorithm used in FindGraphPartition in Mathematica 10?

I am working on a graph theoretical project where it would be helpful to know the name of the algorithm used in FindGraphPartition. Question: Where can I find ...
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28 views

How to customize the order of leaf labels in a dendrogram plot?

Take the following simple case as an example: Needs["HierarchicalClustering`"] SeedRandom[99]; Sort@RandomInteger[99, {10}] gives {2, 7, 22, 34, 42, 58, 60, ...
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45 views

Number of clusters varies rapidly

I'm having some trouble with FindClusters. I've got a list of 7,598 vectors, each with 10 real numbers generally between 0 and 1. The number of clusters for the ...
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52 views

Can parallelization speed up FindClusters?

I have a clustering task that would take FindClusters 2-3 months1 to complete. Can this calculation be sped up with parallelization? (FWIW, the data to be ...
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28 views

Cluto functionality in Mathematica

Hi is there a function or library that is available in Mathematica that will enable Cluto-like cluster analysis
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74 views

Statistical significance test of FindCluster

I have a list of vectors which could be roughly divided into two clusters. The list is huge so I have to use RandomChoice[list, 20000] to speed up the calculation. ...