lookup_and_replace: Look up and replace values in columns, including list...
In dymium-org/dymiumCore: A Toolkit for Building a Dynamic Microsimulation Model for Integrated Urban Modelling

Replace all values in a data.frame using a lookup table. Maximum of one list column can be include in cols_to_lookup.

1	lookup_and_replace(data, lookup_table, cols, id_col = NULL)

`data`	a data.table/data.frame to be replaced.
`lookup_table`	a data.table/data.frame contains two columns which must be named as `.key` and `value`. The reason for requiring a dot infront of `key` is that `key` is a reserved column name in `data.table` meaning no columns can be named `key`. Also the `.key` column should have the same data type as `cols_to_lookup` columns.
`cols`	column names to be lookup and replace
`id_col`	a column with unique value to be used in unnesting `data`. This is not required if `cols_to_lookup` doesn't contain any list columns.

data.table with new values

dymium-org/dymiumCore documentation built on July 18, 2021, 5:10 p.m.

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