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Reshape data frame to a longer format
reshape_longer(dt, keep_cols, label_cols, value_cols)
data table in a longer format
input data
columns to be kept
column name that contains the melted columns
column name that contains the value of melted columns
data("dt_dates") reshape_longer(dt_dates, keep_cols = "Full_name", label_cols = c("Date_Type"), value_cols = "Exact_date")
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