st: re: padding zeroes, writing functions

[Kit Baum <baum@bc.edu>]

Joe said:

5. Anything else that you need returned in double-precision.  Now, if  
a user
takes the time to assure precision by bounding the error in a numerical
integration, for example, the integral still gets returned from Mata to
Stata in a single-precision return scalar.


This is patently untrue. There is no such thing in Stata as a single- 
precision scalar.

. mata
------------------------------------------------- mata (type end to  
exit) ---------
: pie=pi()

: printf("Pi is %20.14f \n",pie)
Pi is     3.14159265358979

: st_numscalar("r(joe)",pie)

: end
------------------------------------------------------------------------ 
-----------

. di %20.14f r(joe)
    3.14159265358979


If you do not alter the display format, it does not display all those  
significant digits, but they are there.

Kit Baum, Boston College Economics
http://ideas.repec.org/e/pba1.html
An Introduction to Modern Econometrics Using Stata:
http://www.stata-press.com/books/imeus.html


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