[R] Fwd: question on constrOptim

Anusha Kothapalli akothapa at umass.edu
Thu Mar 24 13:13:35 CET 2016

---------- 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* 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!

Thanks :)

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