REFLECT

Syntax: | `vout = >−v`

The reflect operator, `>−`, is a unary operator that interchanges the columns of a matrix.

Suppose the matrix `M` has N rows and M columns. Then `>−M` is also an N by M matrix, but column 1 has been interchanged with column M, column 2 has been interchanged with column M-1, and so on.

Examples

Suppose matrix `M` is

         | 1 10 -1 |
     M = | 2 20 -2 |
         | 3 30 -3 |
         | 4 40 -4 |

then

           | -1 10 1 |
     >-M = | -2 20 2 |
           | -3 30 3 |
           | -4 40 4 |

You can reflect the rows of a matrix, by using the reflect operator and the transpose operator.

Suppose `M` is as above. Then

                   | 4 40 -4 |
     <-(>-(<-M)) = | 3 30 -3 |
                   | 2 20 -2 |
                   | 1 10 -1 |

matrix transpose
vector union