To anyone with pre V9
Mathematica: Plotting numeric functions (e.g.
NIntegrate
,
x /. FindRoot[f[x],...]
) does not need
?NumericQ
protection from V9 onwards. Someone added a Plotting section to
mathematica.stackexchange.com/questions/18393/…, some time back, and only now I've checked it. More precise version information about when it's needed might be helpful. Also, are there cases where it's necessary in V9+?