Check out the Optimization Task View:
http://cran.r-project.org/web/views/Optimization.html
On Wed, Jul 8, 2009 at 12:00 AM, leecholho<rokmn3309 at hotmail.com>
wrote:>
>
> thanks...
>
> i do homework.. ?my professor said , to use slover function in excel.
> but i used R , so i want to find same function.
>
> question is " Max(x,y) ?x*E(R.a) + y*E(R.b)" , and x+y=1,
> E(R.a) and E(R.b) is average of the special data..
>
> special data is this
> ? ? ? ?-------------------------------
> ? ? ? ? Nippon Steel Corp
> ? ? ? ?-------------------------------
> ? ? ? ? ? ? ? ? E(R) ? ? ? ? ? ?= 4.65752
> ? ? ? ? ? ? ? ? V(R) ? ? ? ? ? ?= 99.05973
> ? ? ? ? ? ? ? ? sqrt(V(R)) ? ? ?= 9.95288
> ? ? ? ?-------------------------------
> ? ? ? ? Chubu Electric
> ? ? ? ?-------------------------------
> ? ? ? ? ? ? ? ? E(R) ? ? ? ? ? ?= 2.19316
> ? ? ? ? ? ? ? ? V(R) ? ? ? ? ? ?= 40.42778
> ? ? ? ? ? ? ? ? sqrt(V(R)) ? ? ?= 6.35828
> ? ? ? ?-------------------------------
> ? ? ? ? TDK Corporation
> ? ? ? ?-------------------------------
> ? ? ? ? ? ? ? ? E(R) ? ? ? ? ? ?= 1.10754
> ? ? ? ? ? ? ? ? V(R) ? ? ? ? ? ?= 24.24186
> ? ? ? ? ? ? ? ? sqrt(V(R)) ? ? ?= 4.92360
>
>
>> Date: Tue, 7 Jul 2009 20:48:51 -0700
>> From: m_olshansky at yahoo.com
>> Subject: Re: [R] i need same function solver in excel..
>> To: rokmn3309 at hotmail.com
>>
>>
>> Can you be a bit more specific?
>>
>> --- On Wed, 8/7/09, leecholho <rokmn3309 at hotmail.com> wrote:
>>
>> > From: leecholho <rokmn3309 at hotmail.com>
>> > Subject: [R] i need same function solver in excel..
>> > To: r-help at r-project.org
>> > Received: Wednesday, 8 July, 2009, 1:42 PM
>> >
>> > hi..
>> >
>> > i used R a few days..
>> >
>> > who can call me? same function solver in excel.
>> >
>> > _________________________________________________________________
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>> >
>> > ______________________________________________
>> > R-help at r-project.org
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>> > PLEASE do read the posting guide
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>> > and provide commented, minimal, self-contained,
>> > reproducible code.
>> >
>
> _________________________________________________________________
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>
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>
> ______________________________________________
> R-help at r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide
http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>