expanddf: Data Frame Expand
In mojson: A Serialization-Style Flattening and Description for JSON

Description Usage Arguments Details Value Examples

View source: R/expand_df.r

Expand a data frame by splitting one column

1	expanddf(df, column, sep)

`df`	`data frame`. The input to be expanded.
`column`	`character`. The column to be splitted.
`sep`	`character`. Separator for splitting a column.

This function implements the data frame expansion if you need to split one column by the specific characters. The new data frame will generate the new columns named as 'level' appended by position-indexing numbers, such as 'level1', 'level2'. The maximum of appended numbers indicates the most splitting pieces for one cell. If the splitting results of one cell are fewer than the maximum, the row will be padded and corresponding cells will be filled with NAs.

data frame. The resultant data frame with new columns.

library(mojson)
# levels are identical.
df1 <- data.frame(a = c('ab@gmail.com', 'cd@gmail.com'),
                  b = c(TRUE, FALSE))
expanddf(df1, 'a', '@')

# change the separator and treat various levels.
df2 <- data.frame(a = c('1-2-0', '1-2-0-3', '1-2'),
                  b = c(TRUE, FALSE, TRUE))
expanddf(df2, 'a', '-')