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BY ROSELINE ANTAI CLUTO A Clustering Toolkit

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What is CLUTO? CLUTO is a software package which is used for clustering high dimensional datasets and for analyzing the characteristics of the various clusters.

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Algorithms of CLUTO vcluster scluster Major difference: Input format vcluster: actual multidimensional representation of the objects to be clustered. scluster: The similarity matrix (or graph) between these objects.

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Calling Sequence vcluster [optional parameters] MatrixFile Nclusters scluster [optional parameters] MatrixFile NClusters

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Optional Parameters Standard specification -paramname or –paramname = value Three categories: Clustering algorithm parameters Reporting and Analysis parameters Cluster Visualization parameters

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Clustering algorithm parameters Control how CLUTO computes the clustering solution. Examples 1. -clmethod=string ( rb, agglo,direct,graph, etc) 2. -sim = string (cos,corr,dist,jacc) 3. -crfun = string (i1,i2 etc) 4. -fulltree

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Reporting and Analysis Parameters Control the amount of information that vcluster and scluster report about the clusters as well as the analysis performed on discovered clusters. Examples 1. -clustfile = string. ( Default is MatrixFile.clustering.Nclusters( or GraphFile)) 2. -clabelfile = string (name of the file that’s stores the labels of the columns. Used when –showfeatues, -showsummaries or –labeltree are used)

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3. -rlabelfile=string 4. -rclassfile=string (Stores the labels of the rows – objects to be clustered). 5. -showtree 6. -showfeatures (descriptive and discriminating)

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Cluster Visualization Parameters Simple plots of the original input matrix which show how the different objects (rows) and features (columns) are clustered together. Examples 1. -plottree = string; gives graphic representation of the entire hierarchical tree 2. -plotmatrix = string; shows how the rows of the original matrix are clustered together.

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A practical example ../cluto/Linux/vcluster -clmethod=rb -sim=cos -fulltree - rlabelfile=Final_Results/rlabelfile - rclassfile=Final_Results/classfile -showtree -plotformat=gif - plottree=Final_Results/Images/PT-Final10d - plotmatrix=Final_Results/Images/PM-Final10d - plotclusters=Final_Results/Images/PC-Final10d - showfeatures Final_Results/FinalOutput10d-Vt.mat 4

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Classfile and rlabelfile Evo Sem Imp Imp Deo Deo Imp Imp Deo Deo Imp Deo Deo Imp Sem Deo Sem Imp Imp Evo 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

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Plotclusters output

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The plot uses red to denote positive values and green to denote negative values. Bright red/green indicate large positive/negative values, whereas colors close to white indicate values close to zero.

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