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Sandipan Dey's Blog – September 2017 Archive (4)

Some more Social Network Analysis with Python: Centrality, PageRank/HITS, Network generation models, Link Prediction

In this article, some more social networking concepts will be illustrated with a few problems. The problems appeared in the programming assignments in the

coursera course Applied Social Network Analysis in Python.  The descriptions of the problems are taken from the assignments. The analysis is done using NetworkX.

The following theory is going to be used to solve the assignment problems.

 …

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Added by Sandipan Dey on September 21, 2017 at 11:30pm — No Comments

Some Social Network Analysis with Python

The following problems appeared in the programming assignments in the coursera course Applied Social Network Analysis in Python.  The descriptions of the problems are taken from the assignments. The analysis is done using NetworkX.

The following theory is going to be used to solve the assignment problems.

f0.png

1. Creating and Manipulating…

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Added by Sandipan Dey on September 20, 2017 at 11:30pm — 6 Comments

Implementing kd-tree for fast range-search, nearest-neighbor search and k-nearest-neighbor search algorithms in 2D in Java and python

The following problem appeared as an assignment in the coursera course Algorithm-I by Prof.Robert Sedgewick  from the Princeton University few years back (and also in the course cos226 offered at Princeton). The problem definition and the description is taken from the course website and lectures.  The original assignment was to be done in java, where in this article both the java and a corresponding python implementation will…

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Added by Sandipan Dey on September 11, 2017 at 4:30am — No Comments

Distributed K-Means with R-Hadoop

In this article, an R-hadoop (with rmr2) implementation of Distributed KMeans Clustering will be described with a sample 2-d dataset.

  1. First the dataset shown below is horizontally partitioned into 4 data subsets and they are copied from local to HDFS, as shown in the following animation. The dataset chosen is small enough and it’s just for the POC purpose,…
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Added by Sandipan Dey on September 1, 2017 at 11:30am — No Comments

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