摘要：Linux shell is very powerful. Sometimes I use it. But the long command prompts make me uncomfortable. This is my favorate command prompt: export PS1=" 阅读全文

摘要：Introduction A list is an indexed set of objects, which can include different data type, even lists. Its power and utility are from its generality. In 阅读全文

摘要：I build a folder in gitee library. I use picgo to help me upload the pics. At the same time, I want to make a copy for the blog files. I used git pull 阅读全文

摘要：The knitr is an very useful tool to output a report file. Generally, I use knitr::kable(cars,format = "html") to output a html file. In most time, it 阅读全文

摘要：The renv package is a new effort to bring project-local R dependency management to your projects. There are three commands to do it. ·renv::init()·, i 阅读全文