MATLAB: How to create a matrix from given vectors

matrixvector

I have a vector A= [ 2 4 1 3 ]

How can you create a matrix which are the length of the vector values with ones. the rest zeros?

i.e I want

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

Regards

jason

C = zeros(max(A),numel(A));
C(A + (0:numel(A)-1)*size(C,1)) = 1;
B = flipud(cumsum(C(end:-1:1,:)));

A = [1 2 3];
B = [2 4 6];
i2 = cumsum(B);
idx = zeros(1,i2(end));
idx(i2 - B + 1) = 1;
C = A(cumsum(idx));

C = cell2mat(arrayfun(@(x,y)x(ones(1,y)),A,B,'un',0));

i2 = cumsum(B);
i1 = i2 - B + 1;
C = zeros(1,i2(end));
for jj = 1:numel(A)
    C(i1(jj):i2(jj)) = repmat(A(jj),1,B(jj));
end

out = repelem(mod(0:numel(A)-1,2),A);