You may have good reason to distrust the Excel solver :)
See below
John Kane
Kingston ON Canada
-Original Message-
From: rzw...@ets.org
Sent: Sat, 14 Feb 2015 23:53:55 +
To: r-help@r-project.org
Subject: [R] Nonlinear integer programming (again)
Oddly, Excel's Solver
Zwick, Rebecca J RZwick at ETS.ORG writes:
Oddly, Excel's Solver will produce a solution to such problems but
(1) I don't trust it and
(2) it cannot handle a large number of constraints.
[...]
My question is whether there is an R package that can handle this problem.
There are not many
Another user suggested I elaborate on my previous post, giving specifics of the
problem I am trying to solve. Here they are:
It is a selection problem involving sample weights. Say we have applicants
with test scores x. The vector y indicates whether the applicant is a member
of Group Y,
On Sat, 14 Feb 2015, Zwick, Rebecca J wrote:
My question is whether there is an R package that can handle this problem.
Rebecca,
I'm not sure, but have you looked at the Simplex method in the boot()
package?
http://www.astrostatistics.psu.edu/datasets/R/html/boot/html/simplex.html
Rich
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