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
|
require_relative '../../spec_helper'
require 'matrix'
describe "Matrix#singular?" do
it "returns true for singular matrices" do
m = Matrix[ [1,2,3], [3,4,3], [0,0,0] ]
m.singular?.should be_true
m = Matrix[ [1,2,9], [3,4,9], [1,2,9] ]
m.singular?.should be_true
end
it "returns false if the Matrix is regular" do
Matrix[ [0,1], [1,0] ].singular?.should be_false
end
it "returns false for an empty 0x0 matrix" do
Matrix.empty(0,0).singular?.should be_false
end
it "raises an error for rectangular matrices" do
-> {
Matrix[[1], [2], [3]].singular?
}.should raise_error(Matrix::ErrDimensionMismatch)
-> {
Matrix.empty(3,0).singular?
}.should raise_error(Matrix::ErrDimensionMismatch)
end
end
|
