Fit with x , y (labeled data) and unlabeled data (x_U)

Funtion to fit with x and y and x_U. Function calcule y with NA values and append in y param

# S3 method for model_sslr
fit_x_u(object, x = NULL, y = NULL, x_U = NULL, ...)

Arguments

object	is the model
x	is a data frame or matrix with train dataset without objective feature. X only have labeled data
y	is objective feature with labeled values
x_U	train unlabeled data without objective feature
...	This parameter is included for compatibility reasons.