formatp: Format P-values for Functions in the tab Package
In tab: Functions for Creating Summary Tables for Statistical Reports

Description Usage Arguments Details Value Note Author(s) References See Also Examples

This function formats p-values for tables generated by the functions in the tab package. It handles rounding and presentation of p-values.

1 2	formatp(p, decimals = c(2, 3), cuts = 0.01, lowerbound = 0.001, leading0 = TRUE, avoid1 = FALSE)

`p`	Numeric vector of p-values.
`decimals`	Number of decimal places for p-values. If a vector is provided rather than a single value, number of decimal places will depend on what range the p-value lies in. See `cuts` input.
`cuts`	Cut-point(s) to control number of decimal places used for p-values. For example, by default `cuts = 0.1` and `decimals = c(2,3)`. This means that p-values in the range [0.1, 1] will be printed to two decimal places, while p-values in the range [0, 0.1) will be printed to three decimal places.
`lowerbound`	Controls cut-point at which p-values are no longer printed as their value, but rather <lowerbound. For example, by default `lowerbound = 0.001`. Under this setting, p-values less than 0.001 are printed as `<0.001`.
`leading0`	If `TRUE`, p-values are printed with 0 before decimal place; if `FALSE`, the leading 0 is omitted.
`avoid1`	If `TRUE`, p-values rounded to 1 are not printed as 1, but as `>0.99` (or similarly depending on `decimals` and `cuts`).

Character value or vector.

Dane R. Van Domelen

Acknowledgment: This material is based upon work supported by the National Science Foundation Graduate Research Fellowship under Grant No. DGE-0940903.

# Generate vector of numeric p-values
set.seed(123)
p <- c(runif(n = 5, min = 0, max = 1), 1, 0, 4e-7, 0.009)

# Round to nearest 2 decimals for p in (0.01, 1] and 3 decimals for p < 0.01
pvals <- formatp(p = p)

# Use 2 decimal places, a lower bound of 0.01, and omit the leading 0.
pvals <- formatp(p = p, decimals = 2, lowerbound = 0.01, leading0 = FALSE)