[R] Optimizing problem R

[kylmala]

Hi,

I have a problem with R optimization. I try to copy excel solver acts to R.
Solver has some problems with nonlinear optimisation.

Suppose we have resources: (X,Y,Z)=(20, 30, 25) and services:
matrix(10,11,0, 13,12,10, 0,24,26), nrow=3.

Now we should optimize the problem: max( min(a/10,b/11) +
min(aa/13,bb/12,cc/10) + min(24/bb,26/cc) ) so that 

a+aa<=15
b+bb+bb<=35
cc+ccc<=40

Can you help me? I don't get the constraints to optim-function. Is there any
other way to do this than optim?

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