Notes by Lex Toumbourou

Articles in the permanent category

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• SMOTE

  Dec 09, 2017 permanent    MachineLearning

  

  a technique for adding class imbalance by creating synthetic examples

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• K-Means

  Nov 10, 2017 permanent    MachineLearning

  

  an unsupervised clustering algorithm

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• Hash Table

  Oct 10, 2016 permanent    DataStructures  ComputerScience

  

  a key-value pair data structure with constant time data access

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• Migrating TB HBase datasets across datacenters

  Jun 19, 2016 permanent    HBase  DataMigration

  Practical notes on migrating a 2TB HBase cluster from Rackspace to AWS with minimal downtime using CopyTable.

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• Recursive queries in PostgreSQL

  May 08, 2016 permanent    PostgreSQL  DataEngineering

  Walking tree-structured data in PostgreSQL.

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• Mean Absolute Error

  Feb 03, 2016 permanent    MachineLearning

  The average absolute difference between predictions and labels — less sensitive to outliers than RMSE.

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• Root Mean-Squared Error

  Feb 03, 2016 permanent    MachineLearning

  A regression metric that penalises large errors.

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• Hyperplane

  Oct 07, 2015 permanent    MachineLearning  LinearAlgebra

  

  a subspace where the dimension is one less than the ambient space

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• Principal Component Analysis

  Sep 08, 2015 permanent    MachineLearning  DataScience

  

  a technique for reducing the dimensionality of data

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• Dijkstra's Shortest Path Algorithm

  Jan 12, 2014 permanent    ComputerScience  GraphTheory

  An elegant algorithm for finding the shortest path between nodes in a graph.

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