Hi, Having a list, see below output of dput(), with 189 elements of variable length (I dput just the first element), I want to select, those values within a certain period, is to say: lasker[[1]] elements for "1988-01-*" Any idea? Antonio dput(lasker[1], control = "all") list(structure(as.integer(c(1, 1, 3, 2, 1, 5, 4, 1, 1, 4, 2, 1, 1, 1, 7, 1, 1, 2, 2, 2, 4, 2, 2, 1, 5, 4, 1, 8, 5, 4, 4, 2, 1, 2, 2, 2, 3, 3, 2, 5, 1, 3, 1, 2, 6, 3, 3, 1, 2, 2, 3, 1, 2, 1, 1, 2, 1, 2, 2, 3, 1, 2, 2, 1, 1, 1, 3, 2, 1, 1, 2, 1, 1, 2, 2, 1, 2, 2, 2, 2, 4, 3, 5, 1, 1, 2, 1, 4, 2, 7, 3, 3, 1, 1, 1, 2, 3, 1, 1, 3, 1, 2, 5, 2, 1, 1, 4, 1, 5, 3, 2, 1, 3, 5, 3, 2, 1, 1, 1, 3, 1, 1, 1, 6, 2, 1, 1, 3, 1, 3, 2, 1, 1, 2, 2, 1, 9, 3, 6, 6, 3, 1, 1, 2, 7, 2, 1, 1, 2, 2, 4, 3, 3, 1, 9, 3, 6, 2, 1, 4, 2, 1, 4, 6, 2, 4, 2, 3, 3, 2, 8, 2, 3, 3, 1, 6, 1, 1, 2, 2, 2, 5, 4, 1, 4, 1, 1, 1, 1, 1, 1, 2, 1, 4, 3, 2, 1, 1, 1, 1, 2, 1, 1, 1, 3, 2, 3, 1, 5, 2, 6, 2, 10, 1, 6, 2, 3, 3, 1, 4, 1, 6, 1, 2, 2, 1, 1, 1, 2, 3, 1, 3, 2, 1, 2, 5, 1, 2, 2, 3, 3, 1, 1, 1, 2, 3, 6, 9, 1, 1, 1, 1, 2, 3, 3, 2, 2, 4, 1, 1, 1, 1, 1, 3, 7, 1, 2, 2, 1, 1, 1, 6, 10, 1, 1, 1, 5, 7, 1, 1, 7, 2, 6, 1, 2, 9, 5, 3, 5, 5, 2, 1, 1, 4, 1, 4, 2, 2, 2, 2, 1, 2, 4, 4, 2, 3, 5, 1, 1, 3, 1, 3, 1, 3, 7, 3, 13, 1, 1, 1, 2, 1, 2, 1, 1, 1, 4, 1, 2, 2, 1, 6, 2, 1, 3, 5, 8, 1, 1, 1, 1, 1, 1, 4, 4, 2, 1, 4, 2, 1, 1, 1, 3, 1, 1, 1, 3, 5, 1, 1, 12, 1, 1, 1, 1, 3, 2, 1, 2, 5, 1, 2, 1, 3, 1, 2, 9, 6, 2, 2, 7, 2, 1, 2, 2, 3, 1, 1, 1, 5, 4, 1, 1, 1, 2, 2, 2, 3, 2, 1, 1, 1, 2, 1, 2, 5, 3, 2, 1, 2, 2, 2, 3, 5, 2, 1, 2, 1, 2, 4, 2, 2, 1, 3, 1, 3, 5, 10, 4, 6, 2, 3, 1, 1, 1, 3, 2, 4, 2, 1, 1, 2, 1, 6, 2, 1, 3, 1, 3, 2, 2, 8, 3, 2, 1, 9, 1, 2, 7, 1, 1, 5, 3, 4, 2, 1, 1, 5, 3, 2, 1, 1, 2, 1, 1, 1, 1, 1, 1, 3, 1, 1, 3, 1, 2, 1, 1, 1, 1, 2, 3, 1, 5, 3, 1, 1, 1, 7, 6, 1, 6, 1, 1, 3, 4, 2, 1, 1, 6, 6, 1, 2, 4, 1, 3, 3, 4, 3, 2, 1, 1, 3, 3, 7, 4, 1, 2, 3, 2, 2, 7, 1, 1, 1, 3, 1, 4, 2, 1, 3, 1, 1, 2, 1, 2, 1, 1, 1, 1, 4, 3, 3, 2, 4, 2, 1, 3, 1, 1, 2, 2, 2, 1, 1, 5, 1, 2, 3, 1, 2, 1, 4, 1, 1, 4, 3, 3, 1, 2, 1, 3, 5, 4, 2, 8, 1, 5, 1, 2, 2, 2, 3, 4, 4, 1, 1, 1, 3, 2, 7, 1, 3, 1, 2, 2, 3, 2, 3, 2, 3, 6, 2, 3, 2, 1, 3, 2, 2, 1, 2, 4, 1, 3, 2, 1, 3, 4, 1, 3, 3, 4, 3, 1, 3, 1, 3, 2, 3, 7, 2, 2, 3, 1, 1, 3, 3, 1, 2, 2, 3, 2, 2, 1, 2, 1, 1, 3, 4, 2, 4, 1, 1, 4, 5, 3, 2, 2, 1, 2, 9, 5, 3, 5, 1, 13, 1, 1, 1, 1, 1, 2, 8, 2, 2, 1, 2, 2, 1, 2, 1, 1, 1, 1, 2, 1, 1, 2, 2, 7, 1, 2, 1, 7, 3, 2, 1, 1, 3, 2, 3, 1, 1, 1, 5, 3, 2, 1, 11, 1, 2, 2, 4, 2, 1, 11, 2, 2, 2, 5, 4, 1, 3, 1, 5, 1, 2, 1, 7, 1, 5, 5, 7, 1, 5, 7, 5, 2, 5, 1, 2, 1, 3, 1, 3, 4, 4, 1, 3, 1, 1, 1, 1, 1, 3, 2, 2, 1, 1, 2, 1, 1, 2, 2, 1, 2, 4, 1, 2, 1, 2, 2, 1, 1, 1, 1, 2, 1, 7, 6, 3, 6, 1, 3, 2, 5, 2, 1, 2, 5, 1, 5, 2, 1, 1, 4, 2, 1, 2, 5, 2, 6, 7, 3, 1, 1, 2, 3, 3, 2, 1, 1, 2, 5, 1, 1, 4, 2, 9, 1, 5, 3, 1, 1, 2, 2, 2, 3, 3, 4, 2, 5, 4, 1, 1, 1, 3, 1, 1, 1, 1, 2, 2, 1, 1, 3, 1, 3, 2, 3, 2, 1, 1, 2, 2, 2, 1, 3, 5, 2, 2, 2, 1, 4, 1, 4, 4, 3, 1, 5, 2, 2, 4, 4, 1, 1, 1, 2, 1, 2, 8, 1, 9, 6, 4, 1, 2, 7, 1, 6, 1, 1, 3, 3, 1, 4, 1, 3, 1, 3, 3, 2, 1, 1, 1, 2, 1, 1, 2, 8, 4, 1, 3, 1, 4, 3, 1, 3, 3, 1, 7, 2, 4, 1, 1, 2, 1, 2, 3, 3, 4, 2, 3, 2, 2, 1, 1, 1, 1, 1, 8, 3, 7, 3, 1, 4, 4, 2, 1, 1, 3, 4, 2, 1, 2, 3, 2, 1, 1, 2, 2, 2, 7, 4, 1, 2, 1, 3, 2, 3, 1, 2, 2, 1, 1, 7, 1, 5, 4, 1, 2, 1, 1, 4, 1, 1, 4, 1, 1, 1, 2, 2, 1, 2, 1, 1, 8, 2, 1, 1, 1, 2, 4, 2, 6, 1, 5, 2, 1, 2, 2, 3, 2, 1, 1, 9, 10, 1, 6, 1, 1, 8, 6, 1, 2, 3, 1, 1, 2, 2, 1, 1, 1, 1, 7, 2, 1, 1, 2, 1, 4, 1, 1, 3, 1, 1, 1, 2, 7, 3, 5, 2, 1, 1, 3, 1, 5, 3, 2, 1, 1, 1, 3, 5, 1, 3, 4, 1, 1, 8, 2, 1, 1, 2, 4, 1, 1, 5, 2, 1, 1, 4, 3, 2, 8, 2, 1, 3, 2, 2, 2, 4, 2, 5, 3, 5, 3, 5, 1, 2, 3, 1, 2, 2, 1, 1, 1, 1, 2, 2, 1, 2, 2, 2, 1, 1, 2, 2, 3, 1, 5, 2, 1, 2, 2, 1, 4, 6, 1, 7, 1, 1, 3, 4, 1, 1, 4, 1, 2, 2, 4, 1, 1, 6, 2, 5, 2, 4, 6, 5, 3, 2, 8, 3, 1, 1, 10, 6, 2, 1, 3, 2, 2, 9, 3, 1, 3, 5, 1, 1, 5, 1, 4, 1, 1, 2, 1, 1, 7, 1, 2, 2, 3, 1, 3, 1, 1, 1, 1, 1, 6, 1, 4, 1, 2, 1, 1, 1, 2, 2, 2, 6, 1, 2, 1, 5, 1, 1, 1, 1, 1, 5, 2, 5, 13, 1, 1, 2, 3, 1, 2, 1, 3, 2, 3, 7, 4, 1, 1, 7, 1, 2, 1, 3, 4, 1, 3, 3, 8, 7, 3, 5, 2, 1, 3, 3, 1, 1, 2, 6, 1, 2, 1, 1, 2, 1, 2, 3, 1, 2, 7, 6, 1, 2, 1)), .Dim = as.integer(1274), .Dimnames = structure(list( c("1988-01-13", "1988-01-16", "1988-01-20", "1988-01-25", "1988-01-30", "1988-02-01", "1988-02-08", "1988-02-14", "1988-02-16", "1988-02-18", "1988-02-24", "1988-03-04", "1988-03-07", "1988-03-14", "1988-03-21", "1988-03-29", "1988-04-06", "1988-04-08", "1988-04-11", "1988-04-14", "1988-04-21", "1988-04-28", "1988-05-01", "1988-05-13", "1988-05-16", "1988-05-25", "1988-05-30", "1988-06-06", "1988-06-16", "1988-06-26", "1988-07-02", "1988-07-07", "1988-07-10", "1988-07-12", "1988-07-15", "1988-07-18", "1988-07-31", "1988-08-05", "1988-08-10", "1988-08-14", "1988-08-25", "1988-09-01", "1988-09-05", "1988-09-09", "1988-09-12", "1988-09-19", "1988-09-24", "1988-09-29", "1988-10-02", "1988-10-06", "1988-10-11", "1988-10-15", "1988-10-17", "1988-10-25", "1988-10-29", "1988-10-31", "1988-11-09", "1988-11-11", "1988-11-17", "1988-11-20", "1988-11-24", "1988-11-28", "1988-12-01", "1988-12-04", "1988-12-06", "1988-12-09", "1988-12-17", "1988-12-21", "1989-01-13", "1989-01-17", "1989-01-19", "1989-01-22", "1989-01-29", "1989-01-31", "1989-02-04", "1989-02-09", "1989-02-28", "1989-03-07", "1989-03-15", "1989-03-22", "1989-03-30", "1989-04-05", "1989-04-11", "1989-04-18", "1989-04-20", "1989-04-22", "1989-04-28", "1989-05-01", "1989-05-12", "1989-05-15", "1989-05-24", "1989-05-30", "1989-06-03", "1989-06-06", "1989-06-09", "1989-06-11", "1989-06-21", "1989-06-26", "1989-06-30", "1989-07-02", "1989-07-06", "1989-07-11", "1989-07-14", "1989-07-21", "1989-07-26", "1989-07-31", "1989-08-02", "1989-08-09", "1989-08-12", "1989-08-21", "1989-08-29", "1989-09-04", "1989-09-06", "1989-09-10", "1989-09-19", "1989-09-23", "1989-09-26", "1989-09-30", "1989-10-08", "1989-10-13", "1989-10-22", "1989-10-28", "1989-11-02", "1989-11-06", "1989-11-14", "1989-11-17", "1989-11-24", "1989-11-27", "1989-12-09", "1989-12-11", "1989-12-19", "1989-12-29", "1990-01-02", "1990-01-04", "1990-01-07", "1990-01-10", "1990-01-13", "1990-01-30", "1990-02-11", "1990-02-21", "1990-02-28", "1990-03-09", "1990-03-12", "1990-03-15", "1990-03-19", "1990-03-28", "1990-04-02", "1990-04-06", "1990-04-11", "1990-04-25", "1990-04-29", "1990-05-04", "1990-05-10", "1990-05-16", "1990-05-19", "1990-05-29", "1990-06-02", "1990-06-09", "1990-06-13", "1990-06-16", "1990-06-21", "1990-06-25", "1990-06-27", "1990-07-07", "1990-07-15", "1990-07-21", "1990-07-28", "1990-08-01", "1990-08-06", "1990-08-10", "1990-08-14", "1990-08-28", "1990-09-06", "1990-09-27", "1990-10-02", "1990-10-04", "1990-10-12", "1990-10-17", "1990-10-20", "1990-10-23", "1990-10-31", "1990-11-12", "1990-11-18", "1990-11-23", "1990-11-27", "1990-12-04", "1990-12-07", "1990-12-13", "1990-12-16", "1990-12-18", "1990-12-27", "1991-01-09", "1991-01-12", "1991-01-14", "1991-01-19", "1991-01-24", "1991-02-04", "1991-02-07", "1991-02-10", "1991-02-12", "1991-02-14", "1991-02-20", "1991-02-25", "1991-02-27", "1991-03-02", "1991-03-09", "1991-03-15", "1991-03-26", "1991-03-28", "1991-04-04", "1991-04-07", "1991-04-17", "1991-04-21", "1991-05-04", "1991-05-11", 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