Dear all,
There are some typos in the last email. I would like to repost it here:
Thanks to suggestions by members of Statalist, I developed the
following program:
program define sol
if "`1'" == "?" { /* if query call ... */
global S_1 "A B" /* identify parameters */
global X = 0.5 /* and initialize */
/* them */
exit
}
/* otherwise, calculate function */
replace `1' = a * exp($X) - b * ($X)^2
set obs 1
gen y=1
nl sol y
end
This program aims at solving the equation: a*exp(X)=b*(X^2). Where a,
and b come from the following data set:
id a b
1 3 5
2 7 9
3 4 7
and so on.
My question is how I can integrate these values of a, and b into the
above program so that the value of X for each individual (ID=1, 2, 3
etc.,) can be solved automatically.
Thanks so much for your help!
Have A Wonderful Day!
On 2/21/07, Quang Nguyen <quangn@gmail.com> wrote:
Dear all,
Thanks to suggestions by members of Statalist, I developed th
efollowing program:
program define sol
if "`1'" == "?" { /* if query call ... */
global S_1 "A B" /* identify parameters */
global A = 0.5 /* and initialize */
global B = 0.5 /* them */
exit
}
/* otherwise, calculate function */
replace `1' = a * exp($X) - b * ($X)^2
set obs 1
gen y=1
nl sol y
end
This program aims at solving the equation: a*exp(X)=b*(X^2). Where a,
and b comes from the following data set:
id a b
1 3 5
2 7 9
3 4 7
and so on.
My question is how I can integrate these values of a, and b into the
above program so that the value of X for each individual (ID=1, 2, 3
etc.,) can be solved automatically.
Thanks so much for your help!
Have A Wonderful Day!
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* http://www.ats.ucla.edu/stat/stata/