Converts columns to a given format.
Usage
cast_columns(
df,
cast_type,
dfname = substitute(df),
vec_name = substitute(cast_type)
)Arguments
- df
A dataframe containing the columns specified in the names of
cast_type.- cast_type
A named list containing the name of the function to cast between types. The list's names are the names of the columns to cast in
df. Elements of this list can be:a character giving a valid function name to call
a list with the first element being the function to call (character) and additional arguments to the function call (that can be named as the names of the functions' arguments).
- dfname
Name of the dataframe to display in the error message. It is useful when this function is used inside other functions for a better error message.
- vec_name
Name of the vector of columns to display in the error message. It is useful when this function is used inside other functions for a better error message.
Value
the original dataframe with the specified columns
casted with the type indicated in cast_type.
Examples
df <- data.frame(num = 1:10,
char = letters[1:10],
date = rep("12/24/2020", 10))
cast <- list(num = "as.character",
char = "as.factor",
date = list("as.Date",
format = "%m/%d/%Y"))
dfcast <- cast_columns(df, cast)