[R] Singular matrix

Bert Gunter gunter.berton at gene.com
Sat Oct 12 07:46:26 CEST 2013

You have posted neither code nor your data, contrary to what the
posting guide asks.

 How do you expect anyone to help?


On Fri, Oct 11, 2013 at 4:54 AM, Aya Anas <aanas at feps.edu.eg> wrote:
> Dear all,
> I am using the DEoptim package. My optimization syntax has three decesion
> variables. If I increase the upper bound of the first or third variables,I
> get an error related to singularity of a matrix. However, I need to
> increase the upper bound of the first and third variables. The true bounds
> for the the three variables are (0,+inf), (0,1) and (0,+inf). However, The
> syntax gives errors even when I set the upper bounds  for the first and
> third variables =10 only . The syntax runs without errors, when I set the
> upper bound <="5" for the third variable for example. The first variable
> even needs a smaller upper bound to run succesfully. I don't know how could
> I handle this problem?could anybody help me to increase the bound of the
> first and third variables to a reasonable large number, without having this
> error?
> "*The syntax is attached*".
> --
> Best Regards
> Aya
> Faculty of Economics & Political Science
> Cairo University
> Tel:(202)35728055-(202)35728116-(202)35736608-(202)35736605
> Fax:(202)35711020
> Follow us on twitter:https://twitter.com/fepsnews
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Bert Gunter
Genentech Nonclinical Biostatistics

(650) 467-7374

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