Have you tried escaping the quotes around `"max"`? That is, have you
tried using this as the code for (2): `r:eval "lp (\"max\", f.obj,
f.con, f.dir, f.rhs)$solution"`?
On 09/18/2014 07:02 PM, bij...@gmail.com wrote:
Hello All,
I am trying to have agents in the model use linear programming techniques to
determine land use. I have used the R-extension to link NetLogo and R. I called
the lpSolve package in R and it loaded but it seems that I can't get the
optimization to run because of a confilcting command in NetLogo and the lpSolve
function.
Specifically,
the command in lpSolve to have the model run in R is:
lp ("max", f.obj, f.con, f.dir, f.rhs)$solution ...(1)
therfore to code it in Netlogo it would be:
r:eval "lp ("max", f.obj, f.con, f.dir, f.rhs)$solution" ...(2)
but "max" is read as a function in NetLogo and the model fails to compile
When I remove the quotations around max, the model compiles but and error
emerges in optimization:
"Extension exception: Error in R-Extension: Error in Eval:
org.nlogo.api.ExtensionException: Error in direction == "min" :
comparison (1) is possible only for atomic and list types" ...(3)
Is there a way to have Netlogo observe "max" in (2) as text?
Alternatively is there a way to have R read max as "max"?
Any help on this would be greatly appreciated
Bijon
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