Thank you very much for your recommendation.
You are right. We can look up the cran list. A problem with R is that some of the so-call packages are indeed wrappers. I would like to gather the user experience from the peer to find out which package is good for RCT, which package is good for Survey study,… causal inference…
I agree with Professor Harrell that my question is very board. Each study has its own data problems. Professor Harrell’s Hmisc is great for handling many data problems including missing data, and his RMS is great for regression problem… I would like to know at least one good package for analysing data for each study design.
All the best