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st: RE: Top ten tricks [was: RE: RE: RE: RE: RE: RE: RE: Using postfile]


From   "Peter Jepsen" <peter@nisjepsen.dk>
To   <statalist@hsphsun2.harvard.edu>
Subject   st: RE: Top ten tricks [was: RE: RE: RE: RE: RE: RE: RE: Using postfile]
Date   Fri, 21 May 2004 15:38:25 +0200

I'd add the following nominees:

1. -stset-'.
2. -return list-. Or rather, all the good things stored in r().
3. _n & _N, although they're not commands.

Peter.


-----Original Message-----
From: owner-statalist@hsphsun2.harvard.edu
[mailto:owner-statalist@hsphsun2.harvard.edu] On Behalf Of Nick Cox
Sent: 21. maj 2004 15:02
To: statalist@hsphsun2.harvard.edu
Subject: st: Top ten tricks [was: RE: RE: RE: RE: RE: RE: RE: Using
postfile]

Thanks very much. Being a bit smart with this stuff depends on smarter
people having written it. 

The deeper lesson is the extraordinary leverage afforded by -by:-. 

That leads to me to ask a question: which would we nominate as (say) the top
ten tricks which are the deepest and most Stataish features in what we use?
What is _both_ simple _and_ deep? 
What leads to great results with at most a few lines of code? 

Let me explain what I mean. 

Something like
-generate- is something utterly fundamental and extraordinarily useful and
Stata could not be imagined without such a commnand. But the main idea is a
standard one. The same could be said about say -if-. 

Commands like -regress- or -stcox- (no
relation) are very well done, and key tools in the toolkit: but the
greatness of the commands matches the greatness of the statistical idea and
the associated machinery. 

On the other hand, -by:- still gives many pleasant surprises once you see
how to use it. 
The more you use, the more you admire it. 

I'd nominate straight away 

1. -by:-. 

2. -foreach- or -forval- with varlists or numlists. 

3. -merge-. I rarely use it but -merge-masters have real leverage in file
manipulations. 

4. -assert-. My candidate for the most
underestimated command in Stata (second is -count-).  

5. -reshape-. 

Any other nominations? 

Nick
n.j.cox@durham.ac.uk 

Amani Siyam 

<nice message>  

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