How to replace zero with a number in null matrix at required position

A simple case like this

I want to replace the some elements with other numbers like this

Answer 1

[Raj]

I see no specific pattern in your modified matrix. So just use proper indexing to insert the required number at required location.

A=zeros(5)
A(1,5)=7
A(2,2)=8
A(3,5)=2
A(4,2)=4
A(5,3)=1

Its quite trivial so I am not sure if this is what you are looking for.

[kamal]

Thank you...