如何在SAS 9.4中创建和使用R功能？

I have defined some R functions in R studio which has some complicated scripts and a lot of readlines. I can run them successfully in R studio. Is there any way, like macros to transfer these user-defined functions to SAS 9.4 to use? I am not pretty familiar with SAS programming so it is better just copy the R functions into SAS and use it directly. I am trying to figure out how to do the transformation. Thank you! I have defined some R functions in R studio whi