function to calculate summation in matrix

if i have a (M x N) matrix_A with zeros and another (M x N/2) matrix_B filled by number and combine these matrices to each other which the number in the matrix_B represent numbers of 1 in the matrix_A .. For Example

 matrix_A = [0 0 0 0 0 0 0 0 0 0 ] ...... 10 of zeros

 matrix_B = [1 2 2 2]

the solution must be in a first matrix after apply the function .. for the previous example the solution is

matrix_A = [1 0 1 1 0 1 1 0 1 1]

Note : in matrix_B between each of number of one's there must be a zero or more .

the equation is if N == ∑k(i) + (n-1) then the function will be apply . where ∑k(i) = 1+2+2+2 = 7 , (n-1) is the number of numbers in the row in matrix_B (4 -1) = 3 .. then when we apply the equation .. 10 == 7+3 ------ true then apply the function.

[Azzi Abdelmalek]

What is your question? to make it clear, post a short example, you don't need to post tens of numbers, just a small matrix, with expected result, explaining how to obtain it, sometimes, the expected result is enough to explain what you want.

[Firas Al-Kharabsheh]

http://www.mathworks.com/matlabcentral/answers/276558-function-matrix-used-summation

Answer 1

[Roger Stafford]

Instead of inserting ones into a pre-existing A of zeros, it is easier to generate A from scratch:

   A = [];
   for k = 1:size(B,2)
     A = [A,ones(1,B(k)),0];
   end
   A = A(1:end-1); % Remove the extra zero