R help - Jun 2009 - Manipulate solution of simplex

Hi,

I need some help. I'm doing a project that demands me to obtain several
simplex solutions and I would like to can keep the solution in a vector or
something to be able to use it after I get it.
The comand simplex() prints the solution but how can I keep it?
Another alternative would be to export it to excel, how can I do this?

I just see the solution and have to note it on a paper or something?

Thanks

Ana

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On Jun 19, 2009, at 4:51 AM, Ana Ramos wrote:
> Hi,
>
> I need some help. I'm doing a project that demands me to obtain  
> several
> simplex solutions and I would like to can keep the solution in a  
> vector or
> something to be able to use it after I get it.
> The comand simplex() prints the solution but how can I keep it?
Which package. ??"simplex" produces two possible packages and I by no
means have a full set.

The usual approach to dealing with that problem is assignment to an  
object. If that was not covered in the introductory material that you  
used, then you should find another source for further self-learning  
about R.

> Another alternative would be to export it to excel, how can I do this?
>
> I just see the solution and have to note it on a paper or something?
>
> Thanks
>
> Ana
-- 
David Winsemius, MD
Heritage Laboratories
West Hartford, CT

Dear Ana,
Are you optimizing a linear function?  If so, the simplex() function in the
boot package (see [1]) is what you are using. Using the example at ?simplex
(after loading the boot package):

res <- simplex(a = enj, A1 = fat, b1 = 13800, A2 = rbind(vitx, vity, vitz),
        b2 = c(600, 300, 550), maxi = TRUE)

Then

str(res)

gives you the structure of the res object. To get the solution vector, just
type:

res$soln
#  x1   x2   x3   x4
#  0.0  0.0 13.8  0.0

HTH,

Jorge

[1]
http://astrostatistics.psu.edu/datasets/2006tutorial/html/boot/html/simplex.html


On Fri, Jun 19, 2009 at 4:51 AM, Ana Ramos <aritaramos@gmail.com> wrote:
> Hi,
>
> I need some help. I'm doing a project that demands me to obtain several
> simplex solutions and I would like to can keep the solution in a vector or
> something to be able to use it after I get it.
> The comand simplex() prints the solution but how can I keep it?
> Another alternative would be to export it to excel, how can I do this?
>
> I just see the solution and have to note it on a paper or something?
>
> Thanks
>
> Ana
>
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>
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