Unloading package in one block does not affect the next block

[jcblum]

@yihui

I'm shocked that even an advanced R user like you doesn't know the rule of N+1 backticks when posting literal Rmd examples

As the self-appointed local avatar of n + 1 backtick enlightenment, I can confirm that since the original post was made, @jdlong has been advised on this point and now knows the true path. And for anybody else, it’s in our FAQ!