[R] repeated searching of no-missing values

[hadley wickham]

> graphics,statistical analysis etc. as well as programming. There are just
> too many possible data structures to expect logical consistency in their
> handling throughout (if one can even define what that means in specific
> instances!).

I disagree with this claim: I think it is possible to create a logical
and consistent set of functions for working with the all basic data
structures in R, and this is what I have attempted to do with my plyr
package.  Any remaining inconsistencies are due to my failings, not
the fundamental difficulty of the task.

Hadley

-- 
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