hankel

hankel(list: any[]) : Mat

param list - A 1-D Array or just a series of numbers, must be odd in length.

returns: Mat - A Hankel matrix. Where the skewing up-right diagonals are constant.

This function constructs a Hankel matrix. A Hankel matrix is much easier understood when seen than when said. However, to explain it - if you take any element on the left hand side of the matrix and follow its diagonal in the up-right direction, it should be constant. An example is:

[[1, 2, 3],
[2, 3, 4],
[3, 4, 5]]