1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
|
require_relative '../../../spec_helper'
require 'matrix'
describe "Matrix::LUPDecomposition#determinant" do
it "returns the determinant when the matrix is square" do
a = Matrix[[7, 8, 9], [14, 46, 51], [28, 82, 163]]
a.lup.determinant.should == 15120 # == a.determinant
end
it "raises an error for rectangular matrices" do
[
Matrix[[7, 8, 9], [14, 46, 51]],
Matrix[[7, 8], [14, 46], [28, 82]],
].each do |m|
lup = m.lup
-> {
lup.determinant
}.should raise_error(Matrix::ErrDimensionMismatch)
end
end
end
|
