roll_cor	roll_cor
roll_cov	roll_cov
roll_eigen	roll_eigen
roll_lm	roll_lm
roll_mean	roll_mean
roll_pcr	roll_pcr
roll_prod	roll_prod
roll_scale	roll_scale
roll_sd	roll_sd
roll_sum	roll_sum
roll_var	roll_var
roll_vif	roll_vif
