how to padding array with zeros to limit rows (I can choose the limit)

I have a data with 2 columns

AB=[1 6

2 7

3 8

4 9

5 10]

So, I want to (padding) with zeros to rows number 21, so the result will be

AB=[1 6

2 7

3 8

4 9

5 10

0 0

0 0

0 0

0 0

0 0

0 0

0 0

0 0

0 0

0 0

0 0

0 0

0 0

0 0

0 0

0 0]

Answer 1

[Walter Roberson]

[AB; zeros(21-size(AB, 1),size(AB, 2))]

[Walter Roberson]

In the special case where you know that AB is smaller than desired you can just use

AB(21,end)=0;

Do not use this if AB might already be large enough.

Answer 2

[Voss]

AB=[1 6
    2 7
    3 8
    4 9
    5 10];

AB(21,:) = 0; % MATLAB fills the intervening rows with zeros

disp(AB);

     1     6
     2     7
     3     8
     4     9
     5    10
     0     0
     0     0
     0     0
     0     0
     0     0
     0     0
     0     0
     0     0
     0     0
     0     0
     0     0
     0     0
     0     0
     0     0
     0     0
     0     0

[abdullah al-dulaimi]

thank you so much for your answer

[Voss]

You're welcome!