[R] [Fwd: need some help]

[Uwe Ligges]

Sec.FACEA wrote:

> Dear all,
> 
> I need some help.
> I have some problems trying to use the packages for linear programming. 

What are "the packages for linear programming"?


> I've loaded the packages to R but when I try to use the function R sends 

Have you installed it prior to loading it? Any warnings or errors from 
library()?


> an error warning.
> I don't know if  something is missing
> This is what it shows
> 
>> # Set up problem: maximize
>> # x1 + 9 x2 + x3 subject to
>> # x1 + 2 x2 + 3 x3 <= 9
>> # 3 x1 + 2 x2 + 2 x3 <= 15
>> #
>> f.obj <- c(1, 9, 3)
>> f.con <- matrix (c(1, 2, 3, 3, 2, 2), nrow=2, byrow=TRUE)
>> f.dir <- c("<=", "<=")
>> f.rhs <- c(9, 15)
>> lp ("max", f.obj, f.con, f.dir, f.rhs)
> 
> Error: couldn't find function "lp"


Is lp() in the package you have loaded?

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Uwe Ligges




> Thank you all
> ARC
> 
> 
> 
> 
> 
> 
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