[R-sig-dyn-mod] ConstrOptim Function Error stating ui%*%theta:matrix/vector complex arguments...

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Hi Munjal:

Could you post all of the code (i.e., including definitions of all functions and data structures)?

Cheers,
Daniel

_______________________________
Daniel C. Reed, PhD.
Postdoctoral Fellow,
Dept. of Earth & Environmental Sciences,
University of Michigan,
Ann Arbor, MI, USA.
email: reeddc at umich.edu
web: www.danielreed.org

Hello All,
I am stuck in the following problem.

Cexpt=c(0,25,50,100,150,300,250,125,40)
t=c(0,0.2,0.4,0.6,1,4,8,12,24)
theta0= vector of 6 parms (My initial parameter)

A=Constraint matrix (hopefully 6*6)
B= Constraint vector of length 6)
Cfit=function(t,theta){
          J(t)=function(theta,t)
          Cfit=function(J(t),constant)
        return(Cfit)   }

loss=function(theta,t,Cexpt) { sum(Cexpt- Cfit(t,theta))^2}

Final=constrOptim(theta0,loss,t,Cexpt,NULL,A,B)

When i try to fit it gives me error

ERROR IN UI%*% THETA : MATRIX/VECTOR/COMPLEX ARGUEMENTS REQUIRED OR
SOMETHING...

thank you all.

M
J

-- 
Munjal Patel
PhD Student
Division of Pharmaceutical Sciences
Long Island University
Brooklyn,NY
Cell: 201 707 3301

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