blob: e2c5c8e559645cac6433891fa5b1c660e7539658 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
|
#!/usr/bin/ruby
# -*- mode: ruby -*-
# $Id: matrix-ruby.code,v 1.4 2004/11/13 07:42:14 bfulgham Exp $
# http://www.bagley.org/~doug/shootout/
n = 60 #Integer(ARGV.shift || 1)
size = 40
def mkmatrix(rows, cols)
count = 1
mx = Array.new(rows)
(0 .. (rows - 1)).each do |bi|
row = Array.new(cols, 0)
(0 .. (cols - 1)).each do |j|
row[j] = count
count += 1
end
mx[bi] = row
end
mx
end
def mmult(rows, cols, m1, m2)
m3 = Array.new(rows)
(0 .. (rows - 1)).each do |bi|
row = Array.new(cols, 0)
(0 .. (cols - 1)).each do |j|
val = 0
(0 .. (cols - 1)).each do |k|
val += m1.at(bi).at(k) * m2.at(k).at(j)
end
row[j] = val
end
m3[bi] = row
end
m3
end
m1 = mkmatrix(size, size)
m2 = mkmatrix(size, size)
mm = Array.new
n.times do
mm = mmult(size, size, m1, m2)
end
# puts "#{mm[0][0]} #{mm[2][3]} #{mm[3][2]} #{mm[4][4]}"
|
