Recently I bumped into an issue where a query, ran using the DBI library with the dbGetQuery function returned an integer64. Even without me noticing it. When converting my data frame (or data.table) to a matrix for clustering purposes, I ran into the following error: Error in if (changes ==…
Pandas is the go-to package for anything data science in Python. However, if you’re used to R and the convenience of dplyr or data.table, pandas can be confusing, now and then. For example, the following error is a real newb issue. ValueError: You are trying to merge on object and…
K-means clustering is quick and dirty and generally provides some interesting results. However, the default kmeans function in R lacks features, such as actually storing the model to use the centroids for prediction purposes on unseen data. That’s where flexclust comes in. Flexclust is a package that is designed around…
One of the things that blew my mind the first time I learned about it is bootstrapping. Although very counterintuitive at first glance, it makes perfect sense to estimate the accuracy of your sample estimates, given that you have a representative sample. In this blog post I explain how you…
Every time the word ‘revenue’ turns into ‘revenu’ because Microsoft Office thinks it is a good idea, I start bleeding from my eyes. Hundreds of bloody tissues later, I finally decided to fix it. And it’s surprisingly easy. Apparenty, there is a rule in the Dutch (Nederlands) AutoCorrect that is…
As a consultant, you’re trying to stay independent, not taking sides and avoiding direct speech. You position yourself as ‘the situation’. Consequently, you’re going to be writing a lot of passive sentences. If you’re tired of the blue lines under your sentences in Microsoft Word, I present you an easy…
What’s really cool is that Keras in R now has an interface to AI Platform (fka Cloud ML) in Google Cloud Platform. You do some trial-and-error on your computer and once you’re good to go, you can submit your job with a couple lines of code. Just to be clear:…
Toen Roger McNamee in maart 2019 in zijn podcast-interview met Sam Harris verkondigde dat Android, het mobiele besturingssysteemvan Google, een stofzuiger is voor jouw data, had hij niet kunnen voorzien wat 2 maand later op Google IO aangekondigd zou worden: federated learning. Binnenkort moet de tech-gigant jouw data niet meer…
Whether you’re just passing through, to get to Turkestan or Tashkent, the city of Shymkent (Шымкент or Čimkent) can be a laid-back experience. It is not as big as Almaty, it’s not as Westernized, but you can experience the city’s growth first-hand here. The population and city borders are growing…
Years ago, I worked a short while for a very dysfunctional organization. I was young and in the labor market for less than two years. In less than three months, the key performance indicators (KPIs) to which my performance would be judged grew from zero to over twenty-five. With no…