Note: This is taken from the Chicken Wiki, where a more recent version could be available.

Introduction

matpak is a Scheme library which produces the following functions for matrix/vector manipulation:

Matrix multiplication
Matrix inversion
Inner product of two vectors
Transpose
Determinant

The matpak egg is a packaging of the original source code written by Norman Hardy.

Examples

(use matpak)

; matrix transpose
(mat-transpose '( (1 2) (3 4) ) )  ==> ((1 3) (2 4))

; matrix inverse
(mat-inverse b cc) ; supply the exit continuation

; matrix multiply
(define a '((0 2 4 5) (3 4 5 -2) (7 6 5 3) (4 6 5 7)))
(define b (mat-inverse a cc))
(mat-mult a b) ==> ((1 0 0 0) (0 1 0 0) (0 0 1 0) (0 0 0 1))

; matrix determinant
(mat-determinant b)

; vector inner product
(mat-inner-product '(2 4) '(5 10))  ==> 50

Authors

matpak was authored entirely by Norm Howard - http://www.cap-lore.com/MathPhys/Field/. It was packaged into an egg by Terrence Brannon

License

BSD

Requirements

Depends on the numbers extension.

Version History

1.0 - initial release