MATLAB: How to check number of zeros in an array

vectorzeros

Eg: I have a vector A = [0,0,4,3] and B = [0,1,2,3,4] and C = [0,0,0,0,0] and D = [0,1,2,0,0]

SO THE OUTPUT SHOULD CONTAIN NUMBER OF ZEROS IN EACH VECTOR:

A = 2

B = 1

C = 5

D = 3

 A = nnz(~A)
 B = nnz(~B)
 C = nnz(~C)
 D = nnz(~D)

C = double(A) - double(B);
nnz(C < 5)
nnz(C > 5)

Note: in some contexts, talking about the "difference" between the two would imply

C = abs(double(A) - double(B));

Try this:

A = [0 0 0 0 1 2 3 4 5 6 7 8 9 0 0 0 0];
idx = find(A>0,1);
B = [A(idx:end),zeros(1,idx-1)]