Posts

I would like to introduce a cartoon created by two students from EPFL and one student from UNIL. This is a part of their semester project for the critical data studies class.

In this post, we take a look sparse matrix objects in R in terms of object size. If most of entries in a matrix are 0, we call the matrix is sparse.

Wickham (2019) is a nice book if you want to learn more about R programming. In Chapter 24, it covers R codes profiling. For profiling codes, the author uses bench package, which I have never used.

Generating multivariate normal sample is important for simulation studies. MASS::mvrnorm() is one of the commonly used functions to generate such random sample (Venables and Ripley 2002). However, it is often ignored that the function is not the fastest way due to error handling parts.