[R] difference between nlm and nlminb

[DavidM.UK]

I believe nlminb() performs *constrained* optimization, where as nlm() is for
*unconstrained* opimization

So I guess nlm() is for solving min(f[a,b]), and nlminb() min(f[a,b]) given
a+b <= c 

FYI I think optim() also does constrained optimization, well I've used for
min(f[a,b]) given a <= a* and b <= b*.

David
 

ae2356 wrote:
> 
> 
> Hi, 
>  
> I was wondering if someone could give a brief, big picture overview of the
> difference between the two optimization functions nlm and nlminb. I'm not
> familiar with PORT routines, so I was hoping someone could give an
> explanation. 
>  
> Thanks,
> Angelo
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