This question asks "Is there a package for R to plot Schmidt nets, like it is done in geology?"; the first answer posted said "Try the RockFab library on CRAN", which at least at first glance seems to me to answer the question. It's not entirely clear whether the asker wants a stereographic or Lambert equal-area projection, but at least for the first case RockFab seems to do the job. So it might not be the right answer, and it could certainly be more detailed, but it's an entirely possible answer given that the question hasn't yet been clarified. In fact, someone else posted the same answer after this one was deleted.
Since the answer gathered a quorum of close votes on grounds of "does not answer the question", I assume there's something I'm missing here. Why does it not answer the question?