B_T_Lasso_u_fhome: Bradley-Terry Weighted Likelihood Function with fixed home...

In heilokchow/MWLE-Lasso: Bradley-Terry Model with Exponential Decayed Likelihood function and Lasso Penalty

Description

Bradley-Terry Weighted Likelihood Function with fixed home parameter and Lasso Peanlty's optimization

Usage

B_T_Lasso_u_fhome(df, ability, i0, lambda, wij, u, home)

Arguments

ability	A column vector of teams ability, the last row is the home parameter whose rowname must be "at.home".
i0	A teams index whose ability will be fixed as 0 (usually the team loss most).
lambda	Lasso penalty of no statistical mean, a larger choice of lambda means higher penalty. Usually the best penalty is chosen from Cross-Validation, where in-model's prediction power is maximized.
wij	The weights added to the Lasso Penalty. Can be manually setted or determined using function B_T_Wij.
u	The exponential decay rate.
home	Fixed home parameter.
dataframe	Dataframe with 5 columns. First column is the index of the home teams (use numbers to denote teams). Second column is the index of the away teams. Third column is the number of wins of home teams (usually to be 0/1). Fourth column is the number of wins of away teams (usually to be 0/1). Fifth column is the scalar of time when the match is played until now (Time lag).

Value

Estimated abilities

heilokchow/MWLE-Lasso documentation built on May 23, 2019, 4:03 a.m.