On 24/03/2016 8:13 AM, Anusha Kothapalli wrote:
---------- Forwarded message ----------
From: *Anusha Kothapalli* <akoth...@umass.edu>
Date: Wednesday, March 23, 2016
Subject: question on constrOptim
To: r-c...@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* to
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 you
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!
Modify your objective function to print out the arguments it is given
and the result it produces. You'll likely see something wrong when you
look at those.
If you still can't figure out the problem, simplify things enough to
post to R-help, and post it there. It needs to be in a form that
someone else can run. (Don't email it just to me, send it to the list.)
Duncan Murdoch
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