and - (&) logical and
and(A) is the logical AND of elements of the boolean matrix A . and(A) returns %T ("true") iff all entries of A are %T .
y=and(A,'r') (or, equivalently, y=and(A,1) ) is the rowwise and. It returns in each entry of the row vector y the and of the rows of x (The and is performed on the row index : y(j)= and(A(i,j),i=1,m) ).
y=and(A,'c') (or, equivalently, y=and(A,2) ) is the columnwise and. It returns in each entry of the column vector y the and of the columns of x (The and is performed on the column index: y(i)= and(A(i,j),j=1,n) )).
A&B gives the element-wise logical and of the booleans matrices A and B . A and B must be matrices with the same dimensions or one from them must be a single boolean.