2014年01月26 - I'm pretty new to the R language and trying to find out how you can calculate the inverse of a matrix that isn't square. (non-square? irregular? I'm unsure of the correct terminology).
2017年05月18 - I have already installed Jupyter notebook in my ubuntu 16.04 machine. In jupyter notebook there is by default python installed. Now I want to use R from jupyter notebook.
2012年05月04 - What is the idiomatic way to check and document function preconditions and postconditions in R? I would consider Eiffel's built in require and ensure constructs or D's in and out blocks state of the a