f2dc2027f6
in the original GitHub fork: https://github.com/ntoronto/racket Some things about this are known to be broken (most egregious is that the array tests DO NOT RUN because of a problem in typed/rackunit), about half has no coverage in the tests, and half has no documentation. Fixes and docs are coming. This is committed now to allow others to find errors and inconsistency in the things that appear to be working, and to give the author a (rather incomplete) sense of closure.
63 lines
1.9 KiB
Racket
63 lines
1.9 KiB
Racket
#lang typed/racket
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(require math/array
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"../unsafe.rkt"
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"matrix-types.rkt")
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(provide identity-matrix flidentity-matrix
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matrix->list list->matrix fllist->matrix
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matrix->vector vector->matrix flvector->matrix
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flat-vector->matrix
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make-matrix
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matrix-row
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matrix-column
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submatrix)
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(: identity-matrix (Integer -> (Matrix Real)))
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(define (identity-matrix m) (diagonal-array 2 m 1 0))
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(: flidentity-matrix (Integer -> (Matrix Float)))
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(define (flidentity-matrix m) (diagonal-array 2 m 1.0 0.0))
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(: make-matrix (All (A) (Integer Integer A -> (Matrix A))))
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(define (make-matrix m n x)
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(make-array (vector m n) x))
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(: list->matrix : (Listof* Number) -> (Matrix Number))
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(define (list->matrix rows)
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(list*->array rows number?))
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(: fllist->matrix : (Listof* Flonum) -> (Matrix Flonum))
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(define (fllist->matrix rows)
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(list*->array rows flonum? ))
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(: matrix->list : (All (A) (Matrix A) -> (Listof* A)))
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(define (matrix->list a)
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(array->list* a))
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(: vector->matrix : (Vectorof* Number) -> (Matrix Number))
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(define (vector->matrix rows)
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(vector*->array rows number? ))
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(: flvector->matrix : (Vectorof* Flonum) -> (Matrix Flonum))
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(define (flvector->matrix rows)
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(vector*->array rows flonum? ))
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(: matrix->vector : (All (A) (Matrix A) -> (Vectorof* A)))
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(define (matrix->vector a)
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(array->vector* a))
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(: submatrix : (Matrix Number) (Sequenceof Index) (Sequenceof Index) -> (Matrix Number))
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(define (submatrix a row-range col-range)
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(array-slice-ref a (list row-range col-range)))
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(: matrix-row : (Matrix Number) Index -> (Matrix Number))
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(define (matrix-row a i)
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(define-values (m n) (matrix-dimensions a))
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(array-slice-ref a (list (in-range i (add1 i)) (in-range n))))
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(: matrix-column : (Matrix Number) Index -> (Matrix Number))
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(define (matrix-column a j)
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(define-values (m n)(matrix-dimensions a))
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(array-slice-ref a (list (in-range m) (in-range j (add1 j)))))
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