Extract information from the trained models from a cross-validation
get_cv_fixed_eff(cv)get_cv_r2(cv)
get_cv_fixed_eff() returns a tibble with the estimated
value for each coefficient of each trained model and its associated
standard error. get_cv_r2() returns a tibble with the R squared
for each of the trained models.
An object of class lvmisc_cv.