scaling affine transformation of a set of points

## Syntax

    xy1=scaling(xy,scalingFactor,[orig])

## Arguments

xy1

  matrix of size (2,.).

xy

  matrix of size (2,.).

scalingFactor

  real scalar, coefficient of the linear transformation.

orig

  shift vector; default value is [0;0].

## Description

`scaling` performs an affine transformation on the set of points defined by the coordinates `xy`:

`xy1(:,i) = scalingFactor * (xy(:,i) - orig) + orig`.