How can i add a main line and main column for my table? : my table :

    'L1'    'B'
    'L2'    'B'
    'L3'    'A'
    'L4'    'C'
    'L5'    'B'
    'L6'    'C'
    'L7'    'C'
    'L8'    'A'

How i'd like my table to be :

          Line1   Line2
    Col1 'L1'    'B'
    Col2 'L2'    'B'
    Col3 'L3'    'A'
    Col4 'L4'    'C'
    Col5 'L5'    'B'
    Col6 'L6'    'C'
    Col7 'L7'    'C'
    Col8 'L8'    'A'

Then how can i find all lines with B as column, would something like b_values = `table( 'B' == table(:,2))`

expected output:

          Line1   Line2
    Col1 'L1'    'B'
    Col2 'L2'    'B'
    Col5 'L5'    'B'