?lm.fit is very brief about when to use vs. lm() and vs. .lm.fit.
We see comments like:
"These should usually not be used directly unless by experienced users." and "... for even more experienced users."
Would it be possible to have a little more information what prequisites for a save use of lm.fit() and .lm.fit() are?
What TIBO writes for their enterprise runtime for R in ?lm.fit under "Details" seems to apply to R as well (did not check for all the details provided there): https://docs.tibco.com/pub/enterprise-runtime-for-R/4.3.1/doc/html/Language_Reference/stats/lm.fit.html
Maybe two or three examples would also help to hightlight the differences of lm(), lm.fit(), and .lm.fit().
Bug 18173: Man page for lm.fit is very brief about the circumstances when to use
Suggestion