At the page
http://www.stata.com/stata9/mata.html
it says "Everybody knows that matrix languages evaluate matrix expressions,
such as b=invsym(X'X)*X'y, and Mata is no exception. Because of Mata's
design, however, it is fast enough to work at the element level".
This looks like a disclaimer of some sort about some loss of precision, but
I got quite understand the implications of this.
Can anybody clarify?
How different is it (if any) from the way the same calculation was done in
Stata8?
Thanks
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