Вы можете попробовать:
Filter(function(x) x$cor >= 0.2, ll)
#$OrderForPick
# cor lag
#1 0.292 -2
#
#$TimeForRelease
# cor lag
#1 0.233 2
Также возможно:
ll[vapply(ll, function(x) x$cor >= 0.2, logical(1))]
Данные:
TimeForOrder <- data.frame(cor = 0.092, lag = 1610)
OrderForPick <- data.frame(cor = 0.292, lag = -2)
TimeForShip <- data.frame(cor = 0.124, lag = -358)
TimeForRelease <- data.frame(cor = 0.233, lag = 2)
ll <- list(TimeForOrder = TimeForOrder, OrderForPick = OrderForPick, TimeForShip = TimeForShip, TimeForRelease= TimeForRelease)