Top "Cluster-analysis" questions

Cluster analysis is the process of grouping "similar" objects into groups known as "clusters", along with the analysis of these results.

drawing heatmap with dendrogram along with sample labels

Using the heatmap function of made4, I made this heatmap dendrogram from the example file: data(khan) heatplot(khan$train[1:30,], …

r plot ggplot2 cluster-analysis dendrogram
Dendrogram or Other Plot from Distance Matrix

I have three matrices to compare. Each of them is 5x6. I originally wanted to use hierarchical clustering to cluster …

python matrix scipy cluster-analysis dendrogram
How to color a dendrogram's labels according to defined groups? (in R)

I have a numeric matrix in R with 24 rows and 10,000 columns. The row names of this matrix are basically file …

r plot cluster-analysis dendrogram dendextend
Find groups with high cross correlation matrix in Matlab

Given a lower triangular matrix (100x100) containg cross-correlation values, where entry 'ij' is the correlation value between signal 'i' and …

matlab cluster-analysis correlation
Why doesn't k-means give the global minima?

I read that the k-means algorithm only converges to a local minima and not to a global minima. Why is …

cluster-analysis gradient data-mining k-means convergence
Kmeans matlab "Empty cluster created at iteration 1" error

I'm using this script to cluster a set of 3D points using the kmeans matlab function but I always get …

matlab cluster-analysis k-means
How to specify distance metric while for kmeans in R?

I'm doing kmeans clustering in R with two requirements: I need to specify my own distance function, now it's Pearson …

r cluster-analysis k-means
how to plot a k-distance graph in python

How do I plot (in python) the distance graph for a given value of min-points in DBSCAN??? I am looking …

python cluster-analysis dbscan
How can I find the center of a cluster of data points?

Let's say I plotted the position of a helicopter every day for the past year and came up with the …

algorithm geocoding cluster-analysis data-mining markerclusterer
Best clustering algorithm? (simply explained)

Imagine the following problem: You have a database containing about 20,000 texts in a table called "articles" You want to connect …

algorithm text cluster-analysis data-mining text-mining