all
Determine if all array elements are nonzero or true
Description
tests
along the first array dimension of B
= all(A
)A
whose size
does not equal 1, and determines if the elements are all nonzero or
logical 1
(true
). In practice, all
is
a natural extension of the logical AND operator.
If
A
is a vector, thenall(A)
returns logical1
(true
) if all the elements are nonzero and returns logical0
(false
) if one or more elements are zero.If
A
is a nonempty matrix, thenall(A)
treats the columns ofA
as vectors and returns a row vector of logical1
s and0
s.If
A
is an empty 0-by-0 matrix, thenall(A)
returns logical1
(true
).If
A
is a multidimensional array, thenall(A)
acts along the first array dimension whose size does not equal 1 and returns an array of logical values. The size of this dimension becomes1
, while the sizes of all other dimensions remain the same.