# or

logical OR of the elements of an array

## Calling Sequence

    or(A), or(A,'*')
                or(A,'r'), or(A,1)

                or(A,'c'), or(A,2)

## Description

`or(A)` gives the `or` of the elements of the boolean matrix `A`. `or(A)` is true (`%t`) if at least one entry of `A` is `%t`.

`or([])` returns `%F`.

`y=or(A,'r')` (or, equivalently, `y=or(A,1)`) is the row-wise OR. It returns in each entry of the row vector `y` the OR of the rows of `x` (The OR is performed on the row index : `y(j)= or(A(i,j),i=1,m)`).

`y=or(A,'c')` (or, equivalently, `y=or(A,2)`) is the column-wise OR. It returns in each entry of the column vector `y` the OR of the columns of `x` (The OR is performed on the column index: `y(i)= or(A(i,j),j=1,n)`)).

## Examples

    or([%t %t %f])

## See Also

- or operator (|)
- and
- not
- find