Long to wide key-value reshaping — dt_keybin

Reshape a long format data.table using key-value pairs with data.table::dcast

Usage

dt_keybin_reshape(
  x,
  id_name,
  key_name,
  positive = 1,
  negative = 0,
  xname = NULL,
  verbosity = 1L
)

Arguments

x: data.table object.
id_name: Character: Name of column in x that defines the IDs identifying individual rows.
key_name: Character: Name of column in x that holds the key.
positive: Numeric or Character: Used to fill id ~ key combination present in the long format input x.
negative: Numeric or Character: Used to fill id ~ key combination NOT present in the long format input x.
xname: Character: Name of x to be used in messages.
verbosity: Integer: Verbosity level.

Value

data.table in wide format.

Author

EDG

Examples

if (FALSE) { # \dontrun{
x <- data.table(
  ID = rep(1:3, each = 2),
  Dx = c("A", "C", "B", "C", "D", "A")
)
dt_keybin_reshape(x, id_name = "ID", key_name = "Dx")
} # }