diff options
| author | marcandre <marcandre@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2013-01-13 05:50:34 +0000 |
|---|---|---|
| committer | marcandre <marcandre@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2013-01-13 05:50:34 +0000 |
| commit | ad162055c41cbcb279705480c8405219688e34f2 (patch) | |
| tree | 4aa4a08d2e6b57d2371c547e7f6032e038207ca8 /lib/matrix/eigenvalue_decomposition.rb | |
| parent | 790e7f797b94d5bcbe79448a17189f845aca1498 (diff) | |
* lib/matrix/eigenvalue_decomposition: Fix eigensystem with complex
eigenvectors. Patch by pypypy567.
[Bug #7208] [ruby-dev:46251] [rubyspec:242f8e55bd]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@38799 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
Diffstat (limited to 'lib/matrix/eigenvalue_decomposition.rb')
| -rw-r--r-- | lib/matrix/eigenvalue_decomposition.rb | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/lib/matrix/eigenvalue_decomposition.rb b/lib/matrix/eigenvalue_decomposition.rb index ab5888ff37..1949406687 100644 --- a/lib/matrix/eigenvalue_decomposition.rb +++ b/lib/matrix/eigenvalue_decomposition.rb @@ -84,14 +84,14 @@ class Matrix private def build_eigenvectors # JAMA stores complex eigenvectors in a strange way - # See http://cio.nist.gov/esd/emaildir/lists/jama/msg01021.html + # See http://web.archive.org/web/20111016032731/http://cio.nist.gov/esd/emaildir/lists/jama/msg01021.html @e.each_with_index.map do |imag, i| if imag == 0 Array.new(@size){|j| @v[j][i]} elsif imag > 0 Array.new(@size){|j| Complex(@v[j][i], @v[j][i+1])} else - Array.new(@size){|j| Complex(@v[j][i], -@v[j][i-1])} + Array.new(@size){|j| Complex(@v[j][i-1], -@v[j][i])} end end end |