How to remove second digit of first a column

I have one matrix A = [21 2; 34 3; 13 4] I want to remove first digit of first column, so that result shall be A= [1 2;4 3; 3 4]

[Stephen23]

Duplicate:

https://www.mathworks.com/matlabcentral/answers/321691-how-to-remove-second-digit-of-first-a-column

Answer 1

[KSSV]

   A = [21 2; 34 3; 13 4]  ;
   B= [1 2;4 3; 3 4] ;
   iwant = A ;
   for i = 1:size(A,1)
       tmp=str2double(regexp(num2str(A(i,1)),'\d','match')) ;
       iwant(i,1) = tmp(2) ;
   end
   iwant