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Re: st: number of equations ml


From   Richard Williams <Richard.A.Williams.5@ND.edu>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: number of equations ml
Date   Wed, 17 Aug 2005 07:56:45 -0500

I'm not totally clear on what you want to do. Do you mean that you want to interactively specify the # of equations when calling the program, e.g. you want to be able to type something like

myprog y x, neqn(4)

If so, that is pretty easy to do:

program myprog
version 9
syntax varlist(default=none), neqn(integer)
...

Then just skip defining neqn in your program (also, refer to it as `neqn' rather than `Neqn')

If that is not what you have in mind, perhaps you could clarify?

At 06:12 AM 8/17/2005 -0500, Dan Powers wrote:

Dear List --

I am trying to automate a bit of code to handle two or more equations. I
would like the number of equations to be be known when ml is called to set
the upper index of the loops.

For example, I would like stata to pick up the value of Neqn (from the code
below) at the time ml is called, instead of having to fix it (to the value
4) in advance.

*
* extract Xb = b*X and Xa = a*x for all Eqns.
*

local Neqn  = 4
local Nprob = `Neqn' - 1

forval i = 1 / `Neqn'{
tempvar xb`i'
mleval `xb`i' '   = `b', eq(`i')
}
-------------------------------------------
Richard Williams, Notre Dame Dept of Sociology
OFFICE: (574)631-6668, (574)631-6463
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EMAIL:  Richard.A.Williams.5@ND.Edu
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