From: Phrogz <gavin@...>
Date: 2007-01-11T06:55:09+09:00
Subject: Re: Matrix class for ruby

T. W. Urp wrote:
> They never taught me about transposing, just matrix multiplication, and
> googel didnt help either. What is transposing (for transformation matrices)?

Also, RTFM :)

C:\>ri transpose
More than one method matched your request. You can refine
your search by asking for information on one of:

     Array#transpose, Matrix#transpose


C:\>ri Array.transpose
--------------------------------------------------------
Array#transpose
     array.transpose -> an_array
------------------------------------------------------------------------
     Assumes that _self_ is an array of arrays and transposes the rows
     and columns.

        a = [[1,2], [3,4], [5,6]]
        a.transpose   #=> [[1, 3, 5], [2, 4, 6]]


C:\>ri Matrix.transpose
-------------------------------------------------------
Matrix#transpose
     transpose()
------------------------------------------------------------------------
     Returns the transpose of the matrix.

       Matrix[[1,2], [3,4], [5,6]]
         => 1 2
            3 4
            5 6
       Matrix[[1,2], [3,4], [5,6]].transpose
         => 1 3 5
            2 4 6


     (also known as t)