The new 4.19 kernel is causing trouble

A "kworker" process is hogging my CPU. I have to go back to 4.18 kernel to resolve this issue.

Good tmap examples

I learned a lot from this.

How to increase graph resolution in Rmarkdown and more

Very useful information here.

Animate a line plot

This is very helpful.

Visualization and animation

Fascinating resources here.

Installing VMware workstation 15 on Manjaro

A few things to notice:

1. Need to install Linux header files;
2. Consult the pinned comments here.

A few useful commands:

• sudo modprobe -a vmw_vmci vmmon
• sudo vmware-modconfig --console --install-all
• sudo systemctl enable vmware-networks
• sudo systemctl start vmware-networks
  

Zapcc with Rstan

I use the brms package, which uses the standard R formula syntax to generate Stan code, which gets translated into C++ code by rstan, get compiled and executed. In this process, a optimized C++ compiler can make a big difference.

Here I ran the brms sample code for the spatial simultaneous autoregressive (SAR) sample code using clang++ and zapcc and benchmared the performance (three times):

clang++: 66.89 (lagsar), 49.02 (errorsar)
zapcc: 56.80 (lagsar), 18.43 (errorsar)

Such a performance boost can be achieved by simply switching a compiler!

Statistical Rethinking with brms, ggplot2, and the tidyverse

Amazing resource here. Great book, very exciting!

Arch-Data-Science

Data science toolkit for Arch and Arch-based system here.