How to efficiently create a vector?

I want create a matrix such that

A matrix mat_B = [ 1 2 3 4 5; 6 7 8 9 10; 11 12 13 14 15; 16 17 18 19 20].

Is there any other code that more efficient than the code I make below?

for i = 1:5 if i ==1 a (i,:)=1:4; else a (i,:) = (a (i-1,:))+4; end end

Answer 1

[Star Strider]

I would use the reshape function to avoid the explicit loops:

v = 1:20;
mat_B = reshape(v, 5, [])';

[balandong]

Yes, I agree with you, this indeed a more compact solution. Thanks

[Star Strider]

My pleasure.