diff options
author | marcandre <marcandre@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2010-04-29 18:18:58 +0000 |
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committer | marcandre <marcandre@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2010-04-29 18:18:58 +0000 |
commit | a3a4542fb4779a1f4f302126c5e8d7fc024ade4b (patch) | |
tree | 42acb581c55146f9617458d5a896f964b2b7b4a2 /lib | |
parent | 4e6a29e083c03ccf9611120668336458160c27f9 (diff) |
* lib/matrix.rb (Matrix#singular?, Matrix#regular?): raise on rectangular
matrices, and use determinant instead of rank.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@27553 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
Diffstat (limited to 'lib')
-rw-r--r-- | lib/matrix.rb | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/lib/matrix.rb b/lib/matrix.rb index 0f4633212c..12116dbe99 100644 --- a/lib/matrix.rb +++ b/lib/matrix.rb @@ -478,17 +478,17 @@ class Matrix end # - # Returns +true+ if this is a regular matrix. + # Returns +true+ if this is a regular (i.e. non-singular) matrix. # def regular? - square? and rank == column_size + not singular? end # - # Returns +true+ is this is a singular (i.e. non-regular) matrix. + # Returns +true+ is this is a singular matrix. # def singular? - not regular? + determinant == 0 end # |