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

## Description

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

## Usage

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

## Arguments

 `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]`.

## Details

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

## Value

The linear mapping of `x` from `D` to `R`

Landon Sego

## Examples

 ``` 1 2 3 4 5 6 7 8 9 10 11 12 13 14``` ```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) ```

Smisc documentation built on Nov. 21, 2017, 9:02 a.m.