Semi-persistent Matrices🔗 i

Jay McCarthy <jay@racket-lang.org>

(require data/spmatrix ) package: spmatrix

This package defines matrices using semi-persistent vectors from data/spvector

procedure
( build-matrix rowscolscell-f)→matrix?
rows:exact-positive-integer?
cols:exact-positive-integer?
cell-f:(exact-nonnegative-integer? exact-nonnegative-integer? . -> .any/c )

Constructs a matrix m such that (matrix-ref mrici) is (cell-frici).

procedure
( matrix? v)→boolean?
v:any/c

Determines if v is a valid matrix.

procedure
( matrix-rows m)→exact-positive-integer?
m:matrix?

Returns how many rows m has.

procedure
( matrix-cols m)→exact-positive-integer?
m:matrix?

Returns how many cols m has.

procedure
( matrix-valid-ref? mrici)→boolean?
m:matrix?
ri:exact-nonnegative-integer?
ci:exact-nonnegative-integer?

Determines if (matrix-ref mrici) would error.

procedure
( matrix-ref mrici)→any/c
m:matrix?
ri:exact-nonnegative-integer?
ci:exact-nonnegative-integer?

Extracts the value of a cell in the matrix.

procedure
( matrix-set mriciv)→matrix?
m:matrix?
ri:exact-nonnegative-integer?
ci:exact-nonnegative-integer?
v:any/c

Semi-persistently modifies m.

procedure
( matrix-set! mriciv)→void
m:matrix?
ri:exact-nonnegative-integer?
ci:exact-nonnegative-integer?
v:any/c

Destructively modifies m.

procedure
( matrix-fold mrow-fcell-facc)→any/c
m:matrix?
row-f:(exact-nonnegative-integer? any/c . -> .any/c )
cell-f:(exact-nonnegative-integer? exact-nonnegative-integer? any/c any/c . -> .any/c )
acc:any/c

Like foldr but for matrices. row-f is called with the result of cell-f from the last column in the row. cell-f is called from left to right.

procedure
( display-matrix m)→void
m:matrix?

display s the cells of m with (newline ) separating rows.

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