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Article contents:== Outdated egg! This is an egg for CHICKEN 3, the unsupported old release. You're almost certainly looking for [[/eggref/4/matpak|the CHICKEN 4 version of this egg]], if it exists. If it does not exist, there may be equivalent functionality provided by another egg; have a look at the [[https://wiki.call-cc.org/chicken-projects/egg-index-4.html|egg index]]. Otherwise, please consider porting this egg to the current version of CHICKEN. [[tags: egg]] == matpak === 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 [[http://www.cap-lore.com/MathPhys/Field/|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 Description of your changes:

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