How insert value vectors in middle band ?

How insert this value

   mb=[5 6 7 4 5 6 7 8 9 10 11 12 7 8 14 15 16 17 18 ...
       7 8 19 21 23 25 27 29 7 20 22 24 26 28 1 2 1 2 1 2 1 2 1];
   mb1=10*mb;

in the middle band

   A=ones(8);
   for i=1:4
     for j=8-(i+2):8
       A(i,j)=0;
     end
   end
   for i=5:8
     for j=1:8-(i-4)
       A(i,j)=0;
     end
   end

[Reem Al Shehri]

please answer

Answer 1

[Image Analyst]

No one knows what you mean. You have two matrices, mb and mb1. And then you create a new matrix, A, that is all zeros. Do you want mb1 to come after row 4 of A and then A picks up again after MB1 is done? If so do

output = [A(1:4,:); mb1; A(5:end, :)];

Answer 2

[Reem Al Shehri]

the value middle band zeros replace this zeros to value vector after multiply vector of 10

[Image Analyst]

For replacement , rather than insertion , you'd want this:

A(5:6, :) = mb1; % Replace rows 5 and 6 with mb1

[Image Analyst]

Reem's "Answer" moved here since it's not an "Answer" to the originally posted question:

This result

   1     1     1     1     50     60     70     80
   1     1     1     40     50     60     70     80
   1     1     90     100     110     120     70   80
   1     140     150     160     170     180     70  80
   190   210       230     250     270     290     70  1
   200     220     240     260     280     300     1   1
   10     20     10     20     10     1     1     1
   20     10     20     10     1     1     1     1

after insert value vector in middle band

[Image Analyst]

I didn't know until I ran your code that the "band" is a group of 0's running diagonally from the upper right of the array to the lower left of the array. Anyway, do you have what you need now? If not, give the desired array after reading this.