Re: maximization with array of constraints
- To: mathgroup at smc.vnet.net
- Subject: [mg128383] Re: maximization with array of constraints
- From: felipe.benguria at gmail.com
- Date: Thu, 11 Oct 2012 02:10:08 -0400 (EDT)
- Delivered-to: l-mathgroup@mail-archive0.wolfram.com
- Delivered-to: l-mathgroup@wolfram.com
- Delivered-to: mathgroup-newout@smc.vnet.net
- Delivered-to: mathgroup-newsend@smc.vnet.net
- References: <k434cf$ne5$1@smc.vnet.net>
Thank you very much everyone for your help. I am new to this forum and had thought I had answered thanking earlier, but my message had not gone through.
I believe all the suggestions above worked to solve my problem.
Thanks.
El jueves, 27 de septiembre de 2012 23:10:29 UTC-4, Dana DeLouis escribi
:
> > .. if mydata is an array with two columns and 100 rows, I would have 100 constraints, which are too many to enter manually. > .. x*mydata[[1,row,1]] + y*mydata[[1,row,2]] >0 Hi. If I understood your question correctly, here is one
idea: (* Make sure your MyFunction is not unbounded *) mydata=RandomInteger[{1,9},{10,2}] {{7,8},{9,4},{5,7},{4,3},{2,2},{2,7},{8,5},{9,1},{6,5},{5,=
7}} const = Thread[mydata.{x,y}>0] { 7 x+8 y>0, 9 x+4 y>0, 5 x+7 y>0, 4 x=
+3 y>0, 2 x+2 y>0, 2 x+7 y>0, 8 x+5 y>0, 9 x+y>0, 6 x+5 y>0, 5 x+7 y>0 } My=
Function[x_,y_]:=-3x^2-4y+3 NMaximize[{MyFunction[x,y],const}, {x,y} ] {3=
.10884, {x->0.190508,y->-0.0544307} } = = = = = = = = = =
= HTH :>) Dana DeLouis Mac & Mathematica 8 = = = = = = = =
= = = On Thursday, September 27, 2012 3:14:09 AM UTC-4, Felipe wrote:=
> Hi, > > > > I am trying to maximize a function using NMaximize and I hav=
e a large list of constraints that I would like to write with a loop or as =
an array. > > > > It looks like the following: > > > > NMaximize[{myfunctio=
n[x,y] , x*mydata[[1,row,1]] + y*mydata[[1,row,2]] >0 }] > > > > and I want=
the restriction to be valid for the numbers in each row of the "mydata" ar=
ray. That is, if mydata is an array with two columns and 100 rows, I would =
have 100 constraints, which are too many to enter manually. > > Can I write=
a loop for the constraints inside NMaximize ? Do you have some suggestion =
on how to write this? I was not able to find it in earlier posts. > > > > T=
hank you very much for your help > > Felipe