Dear experts,
I'm attempting to solve a constrained optimization problem using the Rdonlp2
package.
I created a Lagrange function (L=f(x)-lambda(g(x)-c)), where x is a vector
of 16 parameters. This is what I'm using as objective function in the code
below. In addition, I set bounds on these parameters (par.u and par.l). When
I run the code, I get the error message shown below. Any idea why or what
does it mean?
Thanks in advance for your help!
ans <- donlp2(par=rate0, fn=L,par.u=par.u, par.l=par.l)
1 fx= 2.869234e+08 upsi= 0.0e+00 b2n= 5.0e+08 umi= 0.0e+00 nr 0
si-1
2 fx= -2.111002e+09 upsi= 0.0e+00 b2n= 5.1e+08 umi= 0.0e+00 nr 14
si-1
3 fx= -5.961701e+09 upsi= 0.0e+00 b2n= 4.1e+08 umi= 0.0e+00 nr 16
si-1
*Error Message:*
Error in tryCatchList(expr, classes, parentenv, handlers) :
SET_VECTOR_ELT() can only be applied to a 'list', not a 'character'
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