How change only second number in a=ones(1,10)?

Answer 1

[Dyuman Joshi]

Simply use indexing to change the element -

a = ones(1,10);
a(2) = 2

a = 1×10

1 2 1 1 1 1 1 1 1 1

Answer 2

[Jaime Abad Arredondo]

You should look at the syntax for array slicing. In matlab it's fairly easy. You would do something like:

a=ones(1,10);
disp(a)

     1     1     1     1     1     1     1     1     1     1

a(2)=2;
disp(a)

     1     2     1     1     1     1     1     1     1     1

Cheers!