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'

Answer 1

[dpb]

Given c is a cell array of your initial data, then

t=cell2table(c,'VariableNames',{'Line1','Line2'},'RowNames',cellstr(num2str([1:size(c,1)].','Col%d')))
t =
  8×2 table
            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'  
>>

For such data, however, I'd strong recommend using categorical

>> t=table(categorical(c(:,1)),categorical(c(:,2)),'VariableNames',{'Line1','Line2'},'RowNames',cellstr(num2str([1:size(c,1)].','Col%d')))
t =
  8×2 table
            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    
>>