linearMap: Linear mapping of a numeric vector or scalar
In Smisc: Sego Miscellaneous

Description Usage Arguments Details Value Author(s) Examples

Linear mapping of a numeric vector or scalar from one closed interval to another

1	linearMap(x, D = range(x), R = c(0, 1))

`x`	a numeric vector
`D`	a vector with 2 elements, the first being the lower endpoint of the domain, the upper being the upper endpoint of the domain. Note `R[1]` must be less than `R[2]`.
`R`	a vector with 2 elements indicating the range of the linear mapping. `R[1]` is mapped to `D[1]`, and `R[2]` is mapped to `D[2]`.

The mapping is f : D --> R, where f(D[1]) = R[1] and f(D[2]) = R[2].

The linear mapping of x from D to R

Landon Sego

x <- seq(0, 1, length = 5)

# An increasing linear map
linearMap(x, R = c(4, 7))

# A decreasing map
linearMap(x, R = c(7, 4))

# A shift
linearMap(x, R = c(-1, 0))

# The identity map:
y <- linearMap(x, D = c(0, 1), R = c(0, 1))
identical(y, x)