<toeplitz-matrix> ( n -- matrix )
Extra matrix operations

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Vocabulary
math.matrices.extras

Inputs

n	an integer

Outputs

matrix

a matrix

Word description
A Toeplitz matrix is an upside-down <hankel-matrix>. Unlike the Hankel matrix, a Toeplitz matrix can be non-square. See hankel matrix.

Examples

USING: math.matrices.extras prettyprint ; 4 <toeplitz-matrix> .
{ { 1 2 3 4 } { 2 1 2 3 } { 3 2 1 2 } { 4 3 2 1 } }

Definition

USING: kernel math sequences ;

IN: math.matrices.extras

: <toeplitz-matrix> ( n -- matrix )
    <iota> dup [ - abs 1 + ] cartesian-map ;