Combining a matrix with a null matrix

I have a very basic problem. I want to replace some entries of zero matrix with the elements of another non zero matrix. I tried with for loop by using conditional statements. But it didn't work.

x = [1 2 3 4], Y= [0 0 0 0 0 0 0 0 0 0]

desired output

z = [1 2 3 4 0 0 0 0 0 0]

So anyone please help. Thanks in advanced

Answer 1

[David Hill]

z=Y;
z(1:length(x))=x;

[Arjun Upadhyay]

I have done this with the the help of conditional statements and for loop. But this is quick and easy solution. Thank you.