Indexing problem. I want to insert a vector into another vector with a loop.

I have a matrix A, whose initial form is as follows:

A = [5 4 3]

By using the following expression:

A = [A,zeros(1, 12)];

My matrix turns into:

A = [5 4 3 0 0 0 0 0 0 0 0 0 0 0 0]

I want to insert a vector

i = [1 -1 -1 1]

, and create multiple expressions of A, via a loop.

The result should be something like this:

A = [5 4 3 1 -1 -1 1 0 0 0 0 0 0 0 0]

And then like this:

A = [5 4 3 0 0 1 -1 -1 1 0 0 0 0 0 0 ]

And later like this:

A = [5 4 3 0 0 0 0 1 -1 -1 1 0 0 0 0 ]

The final form of A, should be like this:

A = [5 4 3 0 0 0 0 0 0 0 0 1 -1 -1 1]

How could I code a loop that generates these versions of A?

Answer 1

[the cyclist]

Here is one way.

A = [5 4 3];

B = [1 -1 -1 1 0 0 0 0 0 0 0 0 0 0];

for nb = 0:numel(B)-4
    output = [A circshift(B,nb)]
end

The variable output is the different "versions of A".