Input content of vector into 2nd dimension of 2-D array

I want to import the content of a 1D array (or vector) into new 2-D array, where the first dimension is zeros, and the second dimension is the content of my vector.

The vector (A) contains data points with size(A) = 1, 3330

Dimensions desired for the 2D array are: B (3350, 3330), where the first dimension i is filled with zeros, and the second dimension j is filled with the content of A.

I have tried the following:

for i=1:size(B, 1)
    for j=1:size(B, 2)
        
        B(i,:) = A;
            
    end
end

but this fills both dimensions with A, as opposed to just filling the second dimension (j) with A.

Any help would be appreciated!

Answer 1

[Priysha Aggarwal]

Example : Let 'A' of dimension (1,5) is the input 1D array.

A = [1 2 3 4 5]

If you want your output 2D matrix 'B' to be of dimension (3,5) as :

B = [0 0 0 0 0
     0 0 0 0 0
     1 2 3 4 5]

then do the following :

B = zeros(3,5)
B(end,:) = A

What your code attached above does is :

%iterating over all rows of B
for i=1:size(B, 1)
    %iterating over all columns of B
    for j=1:size(B, 2)
        % changing each row of B as A
        B(i,:) = A;
    end
end

Hence the output of this code on above example will be :

B = [1 2 3 4 5
     1 2 3 4 5
     1 2 3 4 5]

Hope this helps!