ruby/ruby — pull request #594 by gogotanaka (2014-04-13 15:25:10+00:00)
Title: Add two methods to matrix class

Add Matrix#collect_with_index method in order to add Matrix#adjugate beautifully.

I want to make Exploring Data with ruby more easier. So I add these methods.

Some people regards adjugate matrix as Hermitian adjoint.

I regard adjuate matrix as transpose of the cofactor matrix by referencing http://en.wikipedia.org/wiki/Adjugate_matrix.