# and

logical AND of the elements of an array

## Calling Sequence

    b=and(A)
                b=and(A,'*')
                b=and(A,'r')
                b=and(A,1)
                b=and(A,'c')
                b=and(A,2)

## Description

`and(A)` is the logical AND of elements of the boolean matrix `A`. `and(A)` returns `%T` ("true") if all entries of `A` are `%T`.

`and([])` returns `%T`.

`y=and(A,'r')` (or, equivalently, `y=and(A,1)`) is the row-wise 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 column-wise 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)`).

## Examples

    A = [];
    and(A)

    A = %T(ones(1, 3));
    and(A)

    A = %F(ones(1, 3));
    and(A)

    A = %T(ones(1, 3));
    and(A, '*')
    and(A, 'c')
    and(A, 2)
    and(A, 'r')
    and(A, 1)

## See Also

- not
- and operator (&)
- or