[R] Stuck using constrOptim

[dre968]

I'm very interested.  If you wouldn't mind I would love to see it.  

Thank you for the help.



dre968 wrote:
> 
> Trying to use constrOptim to minimize the sum of squared deviations.  I
> put the objective function in as: sum((x %*% Y - Z)^2) so i'm trying to
> get values for x to minimize the sum of the squared deviations between the
> product of x and Y and Z.  
> 
> Anyways i have no problem using this when x is a 3x1 test variable.  it
> works great with the constraints and everything.  when i actually use it
> on my data x is 3x900 or so and it wont optimize it just gives me back my
> initial guess....this is the output i'm getting:
> 
> $value
> [1] 22.7438
> 
> $counts
> function gradient 
>      906       NA 
> 
> $convergence
> [1] 1
> 
> $message
> NULL
> 
> $outer.iterations
> [1] 1
> 
> $barrier.value
> [1] 1.381551e-06
> 
> this is definitely not the right answer and it is just spitting back my
> initial guess back.  
> 
> Any ideas?  are there limits as to how big the variables can be for this
> function?
> 

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