f_conditional_round: Conditional Rounding for Numeric Values

In rfriend: Provides Batch Functions and Visualisation for Basic Statistical Procedures

Conditional Rounding for Numeric Values

Description

Conditionally formats numeric values based on their magnitude. Values that are very small or very large are formatted using scientific notation, while other values are rounded to a specified number of decimal places. Integers are preserved without decimal places. When applied to a data frame, only numeric columns are processed. All output is character string.

Usage

f_conditional_round(
  x,
  threshold_small = 0.01,
  threshold_large = 9999,
  digits = 3,
  replace_na = TRUE,
  detect_int_col = TRUE
)

Arguments

x	A numeric vector or data frame containing numeric columns to be formatted.
threshold_small	Numeric value. Values with absolute magnitude smaller than this threshold will be formatted using scientific notation. Default is 0.01.
threshold_large	Numeric value. Values with absolute magnitude larger than or equal to this threshold will be formatted using scientific notation. Default is 9999.
digits	Integer. Number of significant digits to use in formatting. Default is 3.
replace_na	Logical. If TRUE, NA values will be replaced with empty strings ("") in the output. Default is TRUE.
detect_int_col	Logical. If TRUE, columns in a data.frame containing only integers will be displayed without decimal digits. Columns containing a mix of integers and decimal values will display all values with the specified number of digits. If FALSE, each individual cell is evaluated: integer values are displayed without digits, and numbers containing digits with the specified number of digits. Default is TRUE.

Details

The function applies the following formatting rules:

• Values smaller than threshold_small or larger than threshold_large are formatted in scientific notation with digits significant digits.

• Integer values are formatted without decimal places.

• Non-integer values that don't require scientific notation are rounded to digits decimal places.

• NA values are replaced with empty strings if replace_na = TRUE.

• Empty strings in the input are preserved.

• For data frames, only numeric columns are processed; other columns remain unchanged.

Value

• If input is a vector: A character vector of the same length as the input, with values formatted according to the specified rules.

• If input is a data frame: A data frame with the same structure as the input, but with character columns formatted according to the specified rules.

Author(s)

Sander H. van Delden [e-mail]

Examples

# Vector examples.
f_conditional_round(c(0.0001, 0.5, 3, 10000))
# Returns: "1.000e-04" "0.500" "3" "1.000e+04".

f_conditional_round(c(0.0001, 0.5, 3, 10000, NA), replace_na = TRUE)
# Returns: "1.000e-04" "0.500" "3" "1.000e+04" ""

# Data frame example.
df <- data.frame(
  name = c("A", "B", "C"),
  small_val = c(0.0001, 0.002, 0.5),
  integer = c(1, 2, 3),
  integer_mix = c(10, 20, 30.1),
  large_val = c(10000, 5000, NA)
)

# Show only two digits.
f_conditional_round(df, digits = 2)

# To keep Integers as Integers (no digits)
# in columns with mixed data (Integers and digits)
# set detect_int_col = FALSE
f_conditional_round(df, detect_int_col = FALSE)

rfriend documentation built on Aug. 8, 2025, 7:33 p.m.