Syela,
If you want to constrain parameter "a" to be positive, you can rewrite the
equation replacing "a" with "exp(theta)". Then when you get the estimate
for "theta", simply convert it back to "a".
Jean
On Mon, Oct 3, 2016 at 12:23 PM, Syela Mohd Noor
wrote:
> Hi all, I had a problem with th
Hi Syela,
Are the values in ASFR monotonically increasing with year?
Jim
On Tue, Oct 4, 2016 at 4:23 AM, Syela Mohd Noor wrote:
> Hi all, I had a problem with the parameter estimation of the Brass Gompertz
> model for my dissertation. I run the code for several times based on
> different years
Hi all, I had a problem with the parameter estimation of the Brass Gompertz
model for my dissertation. I run the code for several times based on
different years and it was fine until the seventh year onward where I got
negative values for the parameter (a) which did not make sense since it
represen
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