Add a number every n values

Hi all,

I have a question:

If I have an array

A=[ 1 2 3 4 5   3 0 2 8 3   2 1 0 3 2  0 0 1 1 0  3 1 5  3 2  8 1 0 3 2];

Is it possible to put the a value "a=800" after every 6 elements of A; (or after every 3 elements etc.)

So I get

b=[ 1 2 3 4 5  a  3 0 2 8 3  a   2 1 0 3 2  a 0 0 1 1 0   a 3 1 5  3 2 a  8 1 0 3 2 a];

thanks a lot!!

Nikolas

Answer 1

[madhan ravi]

A=[ 1 2 3 4 5 3 0 2 8 3 2 1 0 3 2 0 0 1 1 0 3 1 5 3 2 8 1 0 3 2];
a=4;
after=6;
b=nan(1,numel(A)+after);
b(after:after:end)=a;
b(isnan(b))=A

Answer 2

[Stephen23]

>> B = reshape(A,3,[]);
>> B(4,:) = 800;
>> B = reshape(B,1,[])
B =
     1     2     3   800     4     5     3   800     0     2     8   800     3     2     1   800     0     3     2   800     0     0     1   800     1     0     3   800     1     5     3   800     2     8     1   800     0     3     2   800