Created
June 9, 2012 11:05
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Identity matrix generation in Scheme
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| (define (identity n) | |
| (letrec | |
| ((uvec | |
| (lambda (m i acc) | |
| (if (= i n) | |
| acc | |
| (uvec m (+ i 1) | |
| (cons (if (= i m) 1 0) acc))))) | |
| (idgen | |
| (lambda (i acc) | |
| (if (= i n) | |
| acc | |
| (idgen (+ i 1) | |
| (cons (uvec i 0 '()) acc)))))) | |
| (idgen 0 '()))) |
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