Assign group membership based on another group membership.
Given a data frame and a grouping column of type factor or character this function generates a new grouping column which groups the groups.
categorize(df, col, categories, cat.col, keep = TRUE, overwrite = FALSE)
df: [data.frame]
Data frame.
col: [character(1)]
Column name of group variable.
categories: [list]
Named list. Names indicate the name of the category while the values are character vectors of values within the range of the col column.
cat.col: [character(1)]
Column name for categorization.
keep: [logical(1)]
Keep the source column col? Default is TRUE.
overwrite: [logical(1)]
If TRUE, cat.col is set to col.
[data.frame] df = data.frame( group = c("A1", "A1", "A2", "A2", "B1", "B2"), perf = runif(6), stringsAsFactors = FALSE) df2 = categorize(df, col = "group", categories = list(A = c("A1", "A2"), B = c("B1", "B2")), cat.col = "group2")