From spencer.graves at prodsyse.com  Sat Oct  8 20:50:35 2016
From: spencer.graves at prodsyse.com (Spencer Graves)
Date: Sat, 8 Oct 2016 13:50:35 -0500
Subject: [Rd] =?utf-8?b?b3B0aW0o4oCmLCBtZXRob2Q94oCYTC1CRkdTLULigJkpIHN0?=
 =?utf-8?q?ops_with_an_error_message_while_violating_the_lower_bound?=
Message-ID: <a4515835-87f7-302d-5420-4cbf10b44fa1@prodsyse.com>

Hello:


       The development version of Ecdat on R-Forge contains a vignette 
in which optim(?, method=?L-BFGS-B?) stops with an error message while 
violating the lower bound.


       To see all the details, try the following:


install.packages("Ecdat", repos="http://R-Forge.R-project.org")


       Then do "help(pac=Ecdat)" -> "User guides, package vignettes and 
other documentation" -> "Ecdat::AverageIncomeModels".


       I've found other optimizers that will get around the problem in 
this case but none that performs as well as optim with many other problems.


       Thanks,
       Spencer Graves


p.s.  I've also tested bobyqa{minqa} or nloptr{nloptr}, recommended in a 
vignette in the lme4 package.  These did better than optim in this 
example but worse in others I tried.



[Rd] =?utf-8?b?b3B0aW0o4oCmLCBtZXRob2Q94oCYTC1CRkdTLULigJkpIHN0?= =?utf-8?q?ops_with_an_error_message_while_violating_the_lower_bound?=
Spencer Graves