R Archives - Ivan Kuznetsov

Measuring user retention using cohort analysis with R

Posted on April 27, 2012 by Ivan Kuznetsov

Cohort analysis is super important if you want to know if your service is in fact a leaky bucket despite nice growth of absolute numbers. There’s a good write up on that subject “Cohorts, Retention, Churn, ARPU” by Matt Johnson. So how to do it using R and how to visualize it. Inspired by examples …

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Heat map visualization of sick day trends in Finland with R, ggplot2 and Google Correlate

Posted on April 24, 2012 by Ivan Kuznetsov

Inspired by Margintale’s post “ggplot2 Time Series Heatmaps” and Google Flu Trends I decided to use a heat map to visualize sick days logged by HeiaHeia.com Finnish users. I got the data from our database, filtering results by country (Finnish users only) in a tab separated form with the first line as the header. Three columns …

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