Tag Archives: python

Machine Learning: K-Means Cluster Analysis using Python – Alcohol intake based on physical and social attributes

Posted on August 3, 2017 by Dr Poh

Plotting data on the graph is like looking at a bunch of stars. They all look the same and the data is difficult to interpret. What if there was a method to colour the stars? Cluster analysis groups observations into … Continue reading →

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Machine Learning: Lasso Regression using Python – Alcohol intake based on physical and social attributes

Posted on July 26, 2017 by Dr Poh

Lasso regression (AKA Penalized regression method) is often used to select a subset of variables. It is a supervised machine learning method which stands for “Least Absolute Selection and Shrinkage Operator”. The shrinkage process identifies the variables most strongly associated … Continue reading →

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Machine Learning: Random Forests using Python – Alcohol intake based on physical and social attributes

Posted on July 24, 2017 by Dr Poh

The decision tree in the previous posts is useful in exploring how variables can predict a particular target or response.However, small changes in data can lead to different results. Like decision trees, Random Forests also assesses variables with respect to … Continue reading →

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Machine Learning: Making Decision Trees using Python – Adolescent Sex and Parenting

Posted on July 21, 2017 by Dr Poh

A decision tree can predict a particular target or response. The decision tree below was made by me using machine learning to test against several relationships which can be found in the National Longitudinal Study of Adolescent Health survey performed … Continue reading →

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