In this small blog post I explain how you can work with a virtual environment in Thonny on a Raspberry Pi. But first, let’s create a virtual environment using venv. Open the terminal Change directory to the folder of your project (cd), or create a new one (mkdir) Inside that…
In this blog post I decompose a time series of monthly data using the pandas and statsmodels package in Python. You can find the data that I use in this blog post in my github repo. It is a monthly average of daily car counts on different hubs on the…
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:…
If you too like Keras and RStudio, you’re probably curious how you can hypertune a model. Here goes. If you’ve paid attention in the previous part, you noticed that I didn’t do any hypertuning at all to tweak the performance of the car price prediction model. I tackle these questions…