Blog
Removing Google Fonts from a Quarto website
Many website frameworks and themes embed Google Fonts, which is very convenient. However, contacting third-party servers in the background without acquiring explicit consent might violate data privacy laws. In addition, using local fonts (or fonts available directly on a website) is often faster than retrieving from an external server. In this post, I show how to disable Google Fonts and use fonts stored on your own server for websites generated with Quarto and its built-in themes.
Whitening with PCA and ZCA
Whitening (or sphering) is an important preprocessing step prior to performing independent component analysis (ICA) on EEG/MEG data. In this post, I explain the intuition behind whitening and illustrate the difference between two popular whitening methods – PCA (principal component analysis) and ZCA (zero-phase component analysis).
Removing eye activity from EEG via ICA
EEG signals often contain eye activity (movement and/or blinks), which usually needs to be removed before performing EEG analysis. In this post, I show how to remove such ocular artifacts using independent component analysis (ICA).
Visualizing EEG data
After importing EEG data, it is usually helpful to visualize the raw EEG traces. Despite the availability of numerous automated artifact removal or reduction techniques, manual inspection remains important (often in combination with automated methods) to obtain clean data. In this post, I show how to visualize an EEG data set and how to interactively mark segments containing artifacts.
Importing EEG data
Python is an extremely popular programming language, and the scientific Python community has created a striving ecosystem of neuroscience tools. Among these, MNE is a popular EEG/MEG package, which offers almost anything required in an EEG processing pipeline. In this post, I show how to import EEG data sets and how to view and edit associated meta data.
