Statalist


[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

RE: st: RE: Return r(111) this time


From   jjc.li@utoronto.ca
To   statalist@hsphsun2.harvard.edu
Subject   RE: st: RE: Return r(111) this time
Date   Sun, 15 Mar 2009 17:39:16 -0400

Sorry but could you take a example?



Quoting Nick Cox <n.j.cox@durham.ac.uk>:

Eva's text was not meant to be taken literally!

Your own syntax commits you to supplying 16 variable names and the name of a matrix in an option.

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

jjc.li@utoronto.ca

Here's the return:


. matrix a = J(1,62,0)

. set trace on

.
. nlsurwellbehav "copies of dep. variables" "right hand side
variables" , at(a)
---------------------------------------------------------------- begin
nlsurwellbehav ---
- version 10.1
- syntax varlist(min=16 max=16) [if], at(name)
time-series operators not allowed
------------------------------------------------------------------ end
nlsurwellbehav ---
r(101);

Quoting Eva Poen <eva.poen@gmail.com>:

I'm not sure I understand you here. Are you referring to the line

replace `lnc' = 5+`aq'*`lnq' ...

where there is a hard coded 5 (not a starting value! This is a set
value.), and did you replace this value of 5 by another parameter,
e.g. `a0'? In terms of the program, that is not a problem as long as
you adjust your code. It would be easiest if you put this parameter
last, since this saves you the pain of changing all your `at'[1,x]
statements to `at'[1,x+1]. Therefore, my suggestion would be to code

       scalar `dmm'=`at'[1,61]
       tempname a0
       scalar `a0'    =`at'[1,62]


       quietly {
          replace `lnc' = `a0'+ ....
       }

Now, for the debugging, just follow my suggestions earlier, and invoke
your program directly. You need to create a matrix of initial values,
e.g. zeros for all coefficients. If you have 62 parameters, you do

matrix a = J(1,62,0)

which gives you a row vector of 62 zeros. Next create copies of all
your dependent variables, and invoke your program:

set trace on
nlsurwellbehav "copies of dep. variables" "right hand side variables" , at(a)

and see where the problem lies.

*
*   For searches and help try:
*   http://www.stata.com/help.cgi?search
*   http://www.stata.com/support/statalist/faq
*   http://www.ats.ucla.edu/stat/stata/





*
*   For searches and help try:
*   http://www.stata.com/help.cgi?search
*   http://www.stata.com/support/statalist/faq
*   http://www.ats.ucla.edu/stat/stata/



© Copyright 1996–2014 StataCorp LP   |   Terms of use   |   Privacy   |   Contact us   |   What's new   |   Site index