roll-package	roll-package
roll	roll-package
roll_all	roll_all
roll_any	roll_any
roll_cor	roll_cor
roll_cov	roll_cov
roll_crossprod	roll_crossprod
roll_idxmax	roll_idxmax
roll_idxmin	roll_idxmin
roll_lm	roll_lm
roll_max	roll_max
roll_mean	roll_mean
roll_median	roll_median
roll_min	roll_min
roll_prod	roll_prod
roll_quantile	roll_quantile
roll_scale	roll_scale
roll_sd	roll_sd
roll_sum	roll_sum
roll_var	roll_var
