[R] Fwd: question on constrOptim
jdnewmil at dcn.davis.ca.us
Thu Mar 24 18:18:41 CET 2016
You are unlikely to get help on this without a reproducible example. One obvious possibility is that those values are already optimal. Another is that you are not invoking the optimization properly.
Sent from my phone. Please excuse my brevity.
On March 24, 2016 5:13:35 AM PDT, Anusha Kothapalli <akothapa at umass.edu> wrote:
>---------- Forwarded message ----------
>From: *Anusha Kothapalli* <akothapa at umass.edu>
>Date: Wednesday, March 23, 2016
>Subject: question on constrOptim
>To: R-core at r-project.org
>To Whom It May Concern,
>We are using constrOptim to maximize a log likelihood function. The
>constrOptim call returns values, however, they are *exactly identical*
>the initial values we input. Our ci, ui, gradient, etc. match the
>requirements for use of this function. So we are out of ideas. Would
>happen to know how to make constrOptim run multiple iterations and/or
>return values that aren't equal to our initial values?
>Any input you have would be greatly appreciated!
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>and provide commented, minimal, self-contained, reproducible code.
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