Re: Cell arrays of strings in "sort" and "unique"

[David Bateman]

> If the position of NaN is important, its recommended doing explicit 
> checks for NaN's - and if only for the sake of readibility of the code.

You've not read sort.cc lately :-) ... If floating format is IEEE754,
doubles are cast as "long long unsigned int" and with a bit of magic
the NaN's are sorted correctly, where the operator < alone won't do
it. This little trick gains a speed factor of 2.5 is sort, but readable
it is not.

Cheers
David

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