Data Science on avanwyk

African Antelope: A Case Study of Creating an Image Dataset with FastAI

andrich@avanwyk.com (Andrich van Wyk) — Sun, 14 Apr 2019 11:19:17 +0000

An end-to-end example of how to create your own image dataset from scratch and train a ResNet50 convolutional neural network for image classification using the FastAI library.

An Overview of LightGBM

andrich@avanwyk.com (Andrich van Wyk) — Wed, 16 May 2018 21:40:00 +0000

This post gives an overview of LightGBM and aims to serve as a practical reference. A brief introduction to gradient boosting is given, followed by a look at the LightGBM API and algorithm parameters.

Encoding Cyclical Features for Deep Learning

andrich@avanwyk.com (Andrich van Wyk) — Fri, 13 Apr 2018 15:50:24 +0000

A key concern when dealing with cyclical features is how we can encode the values such that it is clear to the deep learning algorithm that the features occur in cycles.

This post looks at a strategy to encode cyclical features in order to clearly express their cyclical nature.