In statistical study and research, matrix derivation is used frequently. Some complex formulas can be derived by Matrix Derivation simply. Unfortunately, it seems that students in Statistics will not be taught about matrix derivation.
Some one write their code causually which leads to the difficulties to read. And it may be inevitable to be lazy in programming and not paying attention to code specifications. That will cause some inconvenience to no matter others read our code or ourselves check our own work.
This website is established by R Blogdown. So the first article here is to introduce how to build it by R Blogdown.