Round Numeric Columns in a Data Frame to Specified Digits

Rounds all numeric columns of a data frame to a specified number of digits. Non-numeric columns and attributes are preserved.

round_numeric(x, digits)

Arguments

x

A data frame.

digits

Integer. Number of digits to round to. Or a named vector with variable names and digits to round. The name ".default" sets the digits value for all numeric variables that are not named in the vector.

Value

A data frame with all numeric columns rounded to the specified number of digits.

Details

If digits is a named vector, only the specified columns are rounded to the corresponding number of digits. If the name ".default" is included in the vector, all numeric columns not explicitly named will be rounded to that number of digits.

If digits is a single integer, all numeric columns are rounded to that number of digits.

If digits is NULL, the data frame is returned unchanged.

See also

round()

Author

Juergen Wilbert

Examples

data <- data.frame(
  col1 = c(1.234, 2.345, 3.456),
  col2 = c(4.567, 5.678, 6.789),
  col3 = c(2.537, 4.658, 4.739),
  non_numeric_col = c("A", "B", "C")
)

## round all numeric variables to two digits
round_numeric(data, digits = 2)
#>   col1 col2 col3 non_numeric_col
#> 1 1.23 4.57 2.54               A
#> 2 2.35 5.68 4.66               B
#> 3 3.46 6.79 4.74               C

## round col1 to one digit and col2 to two digits
round_numeric(data, digits = c(col1 = 1, col2 = 2))
#>   col1 col2  col3 non_numeric_col
#> 1  1.2 4.57 2.537               A
#> 2  2.3 5.68 4.658               B
#> 3  3.5 6.79 4.739               C

## round col1 to one digit and all other numeric variables to two digits.
round_numeric(data, digits = c(col1 = 1, .default = 2))
#>   col1 col2 col3 non_numeric_col
#> 1  1.2 4.57 2.54               A
#> 2  2.3 5.68 4.66               B
#> 3  3.5 6.79 4.74               C