We are "HOXO-M" anonymous data analysis and R user group in Japan!!! What is inconvenience of for loops in R? It is that results you get will be gone away. So we have created a package to store the results automatically. To do it, you only need to cast one line spell magic_for(). In this text, we tell you about how to use the magic. 1. Overview for() is one of the most popular functions in R. As y