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regresseur <- function(dataset) {
# Chargement de l'environnement
load("env.Rdata")
cv.out <- cv.glmnet(as.matrix(reg.train.X),reg.train.y,alpha=1)
#model.reg <- glmnet(as.matrix(reg.train.X),reg.train.y,lambda=cv.out$lambda.min,alpha=1)
model.reg <- lm(reg.train.y ~ ., data = reg.train.X)
data.test <- dataset[,reg.mask]
predictions <- predict(model.reg, newdata = data.test)
return(predictions)
}