Articles by Troy Walters

Time Series Analysis in R Part 3: Getting Data from Quandl

October 4, 2017 | Troy Walters

This is part 3 of a multi-part guide on working with time series data in R. You can find the previous parts here: Part 1, Part 2. Generated data like that used in Parts 1 and 2 is great for sake of example, but not very interesting to work with. So let’s get some ...

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Time Series Analysis in R Part 2: Time Series Transformations

September 25, 2017 | Troy Walters

In Part 1 of this series, we got started by looking at the ts object in R and how it represents time series data. In Part 2, I’ll discuss some of the many time series transformation functions that are available in R. This is by no means an exhaustive catalog. If ...

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Time Series Analysis in R Part 1: The Time Series Object

September 19, 2017 | Troy Walters

Many of the methods used in time series analysis and forecasting have been around for quite some time but have taken a back seat to machine learning techniques in recent years. Nevertheless, time series analysis and forecasting are useful tools in any data scientist’s toolkit. Some recent time series-based ...

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Linear Regression from Scratch in R

January 5, 2017 | Troy Walters

One of the very first learning algorithms that you’ll encounter when studying data science and machine learning is least squares linear regression. Linear regression is one of the easiest learning algorithms to understand; it’s suitable for a wide array of problems, and is already implemented in many programming ... [Read more...]

Extracting Tables from PDFs in R using the Tabulizer Package

December 1, 2016 | Troy Walters

Recently I wanted to extract a table from a pdf file so that I could work with the table in R. Specifically, I wanted to get data on layoffs in California from the California Employment Development Department. The EDD publishes a list of all of the layoffs in the state ... [Read more...]

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Articles by Troy Walters

Time Series Analysis in R Part 3: Getting Data from Quandl

Time Series Analysis in R Part 2: Time Series Transformations

Time Series Analysis in R Part 1: The Time Series Object

Linear Regression from Scratch in R

Extracting Tables from PDFs in R using the Tabulizer Package

Articles by Troy Walters

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