[R] Binary decision problem

From: Tolga Uzuner <tolga.uzuner_at_gmail.com>
Date: Thu, 21 Jun 2007 23:41:44 +0100

Dear R Users,

I am trying to use LP_SOLVE and would appreciate any assistance with the following problem:
- I am trying to choose a fixed number of items out of a batch of
items: say 100 out of 800
- items have certain characteristics, say characteric A, B and C

How exactly do I set this up in lp_solve ? If I associate a boolean, 0 or 1, with each item, I can constrain the sum of the boolean to be equal to 100. But how do I then further specify the other constraints (on the sum of B and the sum of C) and the objective function (to maximise the sum of A) ?


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