st: mata st_view() and change in Stata data

[Kit Baum <baum@bc.edu>]

Bill Gould's posting offers useful advice, but missed the point of my 
earlier posting. His solution will not solve the problem at hand:

Solution:  change

     : a = a :+ t

to read

     : a[.,.] = a :+ t

By the way, easier tyan typing

     : t = (0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\70\0\0\0\0\0\0\0\0\0\0\0\0\0)

is

      : t = J(rows(a), 1, 0)


Explanation
-----------

You need to type

                a[.,.] = a :+ t

rather than

                a = a :+ t

because you want Mata to replace the elements of existing matrix a,
not redefine a.

But the original posted wants to do

_equilr(a,r)

and that is the equivalent of saying a = something. As my earlier 
posting pointed out, you cannot use _equilr on a view and expect to 
change the original variables (which was what prompted the original 
question).

Kit

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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