How to: For loop and matrix indexing in matlab?

I = 5; % e.g number of nodes
for i =1:I
    initial_matrix = [0];    % an initial matrix will be generated for each node
end

Now, i want to skip the initial_matrix of node 1 and consider the initial_matrix of all other nodes (nodes 2,3,4 and 5) and subtract each of them from 1 and take their product:

(1 - initial_matrix of node 2) * (1 - initial_matrix of node 3) * (1 - initial_matrix of node 3) * (1 - initial_matrix of node 4) * (1 - initial_matrix of node 5).

• So for each node i, I will consider all other nodes but not the node i itself

Can any one tell me or give me hints on how this can be achieved? Thanks!

[Jan]

The question is unclear. The posted code does not create a vector, but creates the same scalar variable in each iteration. The term "node" is not clear - does "initial_matrix of node 2" mean initial_matrix(2) ?

Creating a vector of zeros is surely a task for the zeros command. Then subtracting the values from 1 and multiplying the results creates 1. So the aim of your code is not clear. I assume you simplified too much.

Answer 1

[Simon]

Hi!

Your code only gives you a scalar "initial_matrix" with value 0.

Take a look at http://www.mathworks.com/help/matlab/math/matrix-indexing.html to read about indexing.