iU {RMM} | R Documentation |
Calculating a value of score function with respect to parameter gamma for each individual and each alternative.
Description
Calculating a value of score function with respect to parameter gamma for each individual and each alternative. Internal function that users should not call directly.
Usage
iU(
eta_wo_k,
gamma,
Attr,
Choice_Set_List,
Alts_Same_Choice_Set,
Is_Purchase,
Base_Prod,
Num_Prod,
Num_Attr,
cond
)
Arguments
eta_wo_k |
numeric, estimated model parameters normalized for baseline product. |
gamma |
numeric, estimated gamma(no-purchase utility). |
Attr |
list, a set of data frame in which alternative specific variables. |
Choice_Set_List |
list, product code included for each choice set. |
Alts_Same_Choice_Set |
list, for internal calculation, a list of data exposed to the same choice set. |
Is_Purchase |
list, for internal calculation, list of customers who are exposed to the same choice set who purchased the product. If purchased 1, otherwise 0. |
Base_Prod |
numeric, the baseline product number |
Num_Prod |
numeric, the number of all products in observed data. |
Num_Attr |
numeric, the number of attributes in observed data. |
cond |
numeric, the value associated with prop, which is the argument of the |
Value
a value of score function with respect to parameter gamma for each individual and each alternative.