df<-read.csv(file="nba_2017_players_with_salary_wiki_twitter.csv")
A<-df[27:198,]
B<-data.matrix(A)
B<-na.omit(B)
library(lars)
la<-lars(x=B[,2:20],y=B[,21],type="lasso")
cv.out<-cv.glmnet(x,y,family="gaussian",nlambda=50,alpha=1)
lambda值是0.019,选出来了9个自变量
请问这个子集的AIC值怎么求