Create a 1-D array that shows the indexes of a 2-D array

Question

Lets say, we have the following two-dimensional array in Matlab:

A=[0 451
   0 446
   0 543
   .....]

etc. I want to create another, one-dimensional array, that will do this: For example, lets call the 1-D array B, B(1) will "show" to [0 451]. B(2) will "show" to [0 446], B(3) will "show" to [0 543] and so on.I hope that my desired result is pretty clear to anyone who could give me a bit help.

Answer 1

Two ways:

a=1:10
split_a1=(reshape(a,2,[])).';

Access split_a1 as split_a1(1,:),...,split_a1(5,:);.

split_a2=mat2cell(a,1,2*ones(1,numel(a)/2));

Access split_a2 as split_a2{1},...,split_a2{5};.

Answer 2

Well, what you have just set is impossible, you are mixing the arrays and the Dimensions. As you have explained it, B is 2-D, and A is 1-D. You can do what you want by doing this:

j=0; 
i=1;
while i<=size(A,2)/2;
    j=j+1;
    B(i,1)=A(j);
    j=j+1;
    B(i,2)=A(j);
    i=i+1;
end