/usr/lib/s9fes/transpose.scm is in scheme9 2010.11.13-2.
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1 2 3 4 5 6 7 8 9 10 11 12 13 | ; Scheme 9 from Empty Space, Function Library
; By Nils M Holm, 2009
; See the LICENSE file of the S9fES package for terms of use
;
; (transpose list) ==> list
;
; Transpose a matrix. A matrix is represented bt a nested list,
; where each inner list is a column of the matrix.
;
; Example: (transpose '((1 2 3) (4 5 6))) ==> ((1 4) (2 5) (3 6))
(define (transpose x)
(apply map list x))
|