transformations: Transformations

In xrobin/xavamess: Useful Miscellaneous Functions

Description

Various scale transformation functions. These will keep the sign of x (and are basically sign(x) * FUN(abs(x)))

Usage

sqrt_transform(x)

power_transform(x, exp = 1/2)

log_transform(x, base = exp(1))

FUN_transform(x, FUN, ...)

Arguments

x	the data vector to transform
exp	the exponent for the transoformation x^exp
base	the logarithm base
FUN	the transformation function, defined on the range [0, +Inf]
...	additional arguments for FUN

Examples

curve(sqrt_transform(x), -2, 2, n = 1000)
curve(power_transform(x), -2, 2, n = 1000)
curve(power_transform(x, 3), -2, 2, n = 1000)
curve(log_transform(x), -2, 2, n = 1000)
curve(log_transform(x, 10), -2, 2, n = 1000)
curve(FUN_transform(x, FUN = function(x) x + 2 * x^3), -2, 2)
curve(FUN_transform(x, FUN = function(x, a, b) x + a * x^b, a = 2, b = 3), -2, 2)
curve(FUN_transform(x, FUN = function(x, a, b) x + a * x^b, a = 4, b = 5), -2, 2)

xrobin/xavamess documentation built on June 15, 2021, 3:46 a.m.