scales (version 1.3.0)

transform_log: Log transformations

Description

• transform_log(): log(x)

• log1p(): log(x + 1)

• transform_pseudo_log(): smoothly transition to linear scale around 0.

Usage

transform_log(base = exp(1))
transform_log10()
transform_log2()
transform_log1p()
log_trans(base = exp(1))
log10_trans()
log2_trans()
log1p_trans()
transform_pseudo_log(sigma = 1, base = exp(1))
pseudo_log_trans(sigma = 1, base = exp(1))

Arguments

base

base of logarithm

sigma

Scaling factor for the linear part of pseudo-log transformation.

Examples

plot(transform_log2(), xlim = c(0, 5))
plot(transform_log(), xlim = c(0, 5))
plot(transform_log10(), xlim = c(0, 5))

plot(transform_log(), xlim = c(0, 2))
plot(transform_log1p(), xlim = c(-1, 1))

# The pseudo-log is defined for all real numbers
plot(transform_pseudo_log(), xlim = c(-5, 5))
lines(transform_log(), xlim = c(0, 5), col = "red")

# For large positives numbers it's very close to log
plot(transform_pseudo_log(), xlim = c(1, 20))
lines(transform_log(), xlim = c(1, 20), col = "red")