Dear All,
 
First of all, this is the first time for me to use R for optimization, I
tried to search r-help postings & googled on weighted sum optimization,
I could not find anything applicable. 
 
I would need to optimize following function in R;
 
MAXIMIZE 
function = w1*R1 + w2*R2 + w3*R3 + w4*R4
 
Where constraints are,
w1 + w2 + w3 + w4 = 1 and  0 <= w1, w2, w3, w4 <= 1
 
Does optim in R can do this optimization? If so, could anyone show me
how to use 'optim()' in R?
 
Thank you in advance and regards,
Myung
 
 
 


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