how can i put NaN

How can i put NaN in row 4

[Yusuf Suer Erdem]

If my answer does your job. Accept my answer please.

Answer 1

[Yusuf Suer Erdem]

Try these codes below which I did for you, I hope could have given you an idea about it. Good luck!

A = randi([1 100],3,30019,'double');                                 
newRow = NaN(1,30019);                      
newMatrix=[A; newRow];

Answer 2

[Walter Roberson]

dl(4,:) = nan;