Why are missing values not ignored by default?

Internals & Design
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64

there has to be somewhere to draw the line ; not every function can propagate missing, but you raise good arguments as to why some of them should

with that being said, I think my ideal world would be:

  • binary operators propagate,
  • statistical moments and quantiles (and cor and cov) skip,
  • everything else MethodError,

so mean(heights .> 5.5) would work just fine