ordinal_to_binary: convert a column of categorical covariates into a number of...
In PKPDmisc: Pharmacokinetic and Pharmacodynamic Data Management Functions

convert a column of categorical covariates into a number of columns with a binary flag for each category

1	ordinal_to_binary_(df, col_name, prefix = NULL, overwrite = FALSE)

`df`	data frame
`col_name`	column name to split into multiple binary flags
`prefix`	string name if want to specify a prefix to label the binary flag columns other than the original col_name
`overwrite`	overwrite any existing columns if the newly generated columns share the same name

library(dplyr)
df <- data_frame(OCC = c(1, 1, 2, 3))
df %>% ordinal_to_binary_("OCC")
df %>% ordinal_to_binary_("OCC", prefix = "OCCASION")

df2 <- data_frame(OCC = c(1, 1, 2, 3), OCC1 = 999)
df2 %>% ordinal_to_binary_("OCC")
df2 %>% ordinal_to_binary_("OCC", overwrite = TRUE)