How to extract elements from an array in three different array

suppose i have an array which stores 19 elements. How to extract first seven elements in one, then next five in another and remaining in third.

Answer 1

[Guillaume]

A = randi(100, 1, 19)
splits = [7 5];
B = mat2cell(A, 1, [splits, numel(A) - sum(splits)]);
celldisp(B)

Use cell arrays rather than numbered variables.

[sneha sharma]

will you please elaborate how it is working

[Guillaume]

I'm not sure what you want me to elaborate on. You just pass the length of the submatrices you want the main matrix to be divided into, to mat2cell.

Answer 2

[the cyclist]

One way:

A = rand(1,19);

B1 = A(1:7);
B2 = A(8:12);
B3 = A(13:end);