This seems like it's easy but I can't seem to get it.
 
 
My equation is (a^b)/c = d.
 
I know that I can solve for b via
 
log(d*c) / log(a) = b
 
 
However, I don't really have d in the first place I have d/sum(d)
values...no d's...just d/sum(d) values that all add to 1.0
 
So, for example, if my data is
 
a=4,9,12,3
b=unknown
c=12,18,13,20
d/sum(d)=43,45,23,18
 
I need an estimate of b. How can I do model and code this?
 
Again, b is a power term of a and b^a are divided by c.
 
Thank you,
Jeff
 
 


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