Displaying 2 results from an estimated 2 matches for "snopt".
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shopt
2010 Jul 07
4
constrained optimization
...Rsolnp package, but unfortunately it is not very clear what method is R
ported. (The authors ported the matlab code of Yinyu Ye
http://www.stanford.edu/~yyye/ <http://www.stanford.edu/%7Eyyye/>)
Currently I'm looking for an implementation of sequential quadratic
programming to replicate SNOPT*. A good reference I found on the web is this
booklet
http://www2.imm.dtu.dk/pubdb/views/edoc_download.php/5456/pdf/imm5456.pdf .
Does anyone know an implementation of such algorithms? Is there any fortran
implementation available useful if I have to implement it?
Thanks in advance
Christophe...
2011 May 12
1
Maximization of a loglikelihood function with double sums
Dear R experts,
Attached you can find the expression of a loglikelihood function which I
would like to maximize in R.
So far, I have done maximization with the combined use of the
mathematical programming language AMPL (www.ampl.com) and the solver
SNOPT (http://www.sbsi-sol-optimize.com/manuals/SNOPT%20Manual.pdf).
With these tools, maximization is carried out in a few seconds. I wonder
if that could possible with R, too. Therefore, I would highly appreciate
if any R user with experience in maximization could tell me if a
function like that could...