encode_onehot {cleandata}

One-Hot Encoding

Description

Encodes categorical data by One-hot encoding. Optionally records the result into a log file.

Usage

encode_onehot(x, colname.sep = '_', drop1st = FALSE,
    full_print=TRUE, log = eval.parent(in_log_default))

Arguments

x

The data frame

colname.sep

A character or string that acts as an divider in the names of the columns of encoding results.

drop1st

Whether drop the 1st level of every encoded column. The 1st level refers to the level that corresponds to 1 in a factor.

full_print

When set to FALSE, only print minimum information. A full output includes summary of x before and after encoding.

log

Controls log files. To produce log files, assign it or the log_arg variable in the parent environment (dynamic scope) a list of arguments for sink(), such as file, append, and split.

Value

An encoded data frame.

Warning

x can only be a data frame. Don't pass a vector to it.

See Also

inspect_map, sink

Examples

# refer to vignettes if you want to use log files
message('refer to vignettes if you want to use log files')

# building a data frame
A <- as.factor(c('x', 'y', 'x'))
B <- as.factor(c('i', 'j', 'k'))
df <- data.frame(A, B)

# encoding
df0 <- encode_onehot(df)
df0 <- cbind(df, df0)
print(df0)
df0 <- encode_onehot(df, colname.sep = '-', drop1st = TRUE)
df0 <- cbind(df, df0)
rm(df)
print(df0)