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]

[Jan]

What do you want for the inputs 123 and -2? Do you really want to remove the first digit, or to obtain the second digit, or to keep the digit smaller than 10?

Answer 1

[James Tursa]

To retain the 1st digit for the numbers shown:

result = [floor(A(:,1)/10) A(:,2)];

To retain the 2nd digit for the numbers shown:

result = [mod(A(:,1),10) A(:,2)];

If numbers can be > 99 or negative, then you will have to let us know what you want for output.

[Vishal Sharma]

I want to retain second digit not the first one ....

[Image Analyst]

Why do you need this quirky, unusual thing?

Answer 2

[Stephen23]

>> rem(A,10)
ans =
   1   2
   4   3
   3   4