I am trying to add a column. I have a column “Y” with values (numeric) going from -50 to 350, I would like to create a new column “Z” evaluating the values creating variables with the conditions from -30 to 30 = “Transition”, 31 to 100 = “Early”, 101 to 200 = “Mid”, 201 to 300 = “Late” everything else “NA” I am trying using the case_when function, within mutate function from dplyr, see code below. But keep getting erorr message. Any help will be very much appreciated

DataSetNew <- DataSet %>%
dplyr::mutate(ColumnZ = case_when(
ColumnY == < = 30 ~ "Transition",
ColumnY == between(31,100) ~ "Early",
ColumnY == between(101,200) ~ "Mid",
ColumnY == between(201,305) ~ "Late",
TRUE ~ "NA"
))
Error: unexpected '<' in:
"  dplyr::mutate(ColumnZ = case_when(
ColumnY == <"