erasing specifi rows from a cell matrix

Dear all,

I have

A={

 '12/08'    ' '
    '01/09'  ' '
    '02/09'  ' '
    '03/09'  ' '
    '03/09'  ' '
    '04/09'  ' '
    '05/09'  ' '
    '06/09'  ' '
    '07/09'   ' '
    '08/09'  ' '
    '09/09'   ' '   
    '10/09'  ' '
    '11/09'  ' '
    '12/09'  ' '
    '01/10'  '33 '
    '01/10'  '55 '
    '02/10'  ' '
    '03/10'  ' '
    '04/10'  ' '
    '05/10'  ' '
    '06/10'  ' '
    '07/10'  ' '
    '08/10'  ' '
    '09/10'  ' '
    '10/10'  ' '
    '11/10'  ' '
    '12/10'  ' '
    '01/11'  '123 '
    '01/11'  ' 321'
    '02/11'  ' '
    '03/11'  ' '
    '04/11'  ' '
    '05/11'  ' '
    '06/11'  ' '
    '07/11'  ' '
    '08/11'  ' '
    '09/11'  ' '
    '10/11'  ' '
    '11/11'   ' '}

I want to erase the second duplicate so as to have

A={

 '12/08'    ' '
    '01/09'  ' '
    '02/09'  ' '
    '03/09'  ' '
    '03/09'  ' '
    '04/09'  ' '
    '05/09'  ' '
    '06/09'  ' '
    '07/09'   ' '
    '08/09'  ' '
    '09/09'   ' '   
    '10/09'  ' '
    '11/09'  ' '
    '12/09'  ' '
    '01/10'  '33 '
    '02/10'  ' '
    '03/10'  ' '
    '04/10'  ' '
    '05/10'  ' '
    '06/10'  ' '
    '07/10'  ' '
    '08/10'  ' '
    '09/10'  ' '
    '10/10'  ' '
    '11/10'  ' '
    '12/10'  ' '
    '01/11'  '123 '
    '02/11'  ' '
    '03/11'  ' '
    '04/11'  ' '
    '05/11'  ' '
    '06/11'  ' '
    '07/11'  ' '
    '08/11'  ' '
    '09/11'  ' '
    '10/11'  ' '
    '11/11'   ' '}

thanks

[Azzi Abdelmalek]

 what about 
    '03/09'  ' '
    '03/09'  ' '
they are identical, will you remove one ?

Answer 1

[Azzi Abdelmalek]

 [x,y]=unique(A(:,1),'stable');A=A(y,:)

Answer 2

[Andrei Bobrov]

[~,b] = unique(A(:,1),'first')
Aout=A(sort(b),:)

or

[c,c,c] = unique(A(:,1));
Aout=A(~([false;diff(c)==0]&~cellfun(@isempty,regexp(A(:,2),'\d*'))),:);

[Sabbas]

Hi andrei,

the code above erases the first and not the second duplicate

thanks

[Andrei Bobrov]

no, erases the second duplicate

[Azzi Abdelmalek]

no, does'nt erase the second, it erase the second after sorting, for example change a value 321 with 32.