Tools -> MulRunFitter
Generators -> Add Fitness Primitive
Fitness -> Expression
ratio_fitness()

Generators -> Use Generator
(double click on unnamed Fitness Primitive)

Generators  -> Change Name
(double click on unnamed Fitenss Primitive)
Type in "Ratio Fitness"

Parameter -> Add parameter -> global_cm
Parameter -> Add parameter -> global_Ra
Parameter -> Add parameter -> global_g_pas

Domain panel -> make logarithmic
 make limits "1 0.75 1e02"
etc.  choose alternating intervals between optimizations and only select one parameter at a time to optimize to
some percentage (10, or 25%) 



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For optimizing to see if can find Ca channel density in spine with
dendritic inhibition try to see if can get Spine1_dCa_ratio near 75
and Spine0_dCa_ratio near 95.  This is meant to be representative of
inhibition in one spine but not another adjacent one:

error = (Spine1_dCa_ratio-75)^2 + (Spine0_dCa_ratio-95)^2