### Navigation

- index
- modules |
- modules |
- next |
- previous |
- NumPy v1.7 Manual (DRAFT) »
- NumPy Reference »
- Routines »

# Logic functions

## Truth value testing

`all`(a[, axis, out, keepdims]) | Test whether all array elements along a given axis evaluate to True.
`any`(a[, axis, out, keepdims]) | Test whether any array element along a given axis evaluates to True.

## Array contents

`isfinite`(x[, out]) | Test element-wise for finite-ness (not infinity or not Not a Number).
`isinf`(x[, out]) | Test element-wise for positive or negative infinity.
`isnan`(x[, out]) | Test element-wise for Not a Number (NaN), return result as a bool array.
`isneginf`(x[, y]) | Test element-wise for negative infinity, return result as bool array.
`isposinf`(x[, y]) | Test element-wise for positive infinity, return result as bool array.

## Array type testing

`iscomplex`(x) | Returns a bool array, where True if input element is complex.
`iscomplexobj`(x) | Check for a complex type or an array of complex numbers.
`isfortran`(a) | Returns True if array is arranged in Fortran-order in memory
`isreal`(x) | Returns a bool array, where True if input element is real.
`isrealobj`(x) | Return True if x is a not complex type or an array of complex numbers.
`isscalar`(num) | Returns True if the type of num is a scalar type.

## Logical operations

`logical_and`(x1, x2[, out]) | Compute the truth value of x1 AND x2 elementwise.
`logical_or`(x1, x2[, out]) | Compute the truth value of x1 OR x2 elementwise.
`logical_not`(x[, out]) | Compute the truth value of NOT x elementwise.
`logical_xor`(x1, x2[, out]) | Compute the truth value of x1 XOR x2, element-wise.

## Comparison

`allclose`(a, b[, rtol, atol]) | Returns True if two arrays are element-wise equal within a tolerance.
`array_equal`(a1, a2) | True if two arrays have the same shape and elements, False otherwise.
`array_equiv`(a1, a2) | Returns True if input arrays are shape consistent and all elements equal.

`greater`(x1, x2[, out]) | Return the truth value of (x1 > x2) element-wise.
`greater_equal`(x1, x2[, out]) | Return the truth value of (x1 >= x2) element-wise.
`less`(x1, x2[, out]) | Return the truth value of (x1 < x2) element-wise.
`less_equal`(x1, x2[, out]) | Return the truth value of (x1 =< x2) element-wise.
`equal`(x1, x2[, out]) | Return (x1 == x2) element-wise.
`not_equal`(x1, x2[, out]) | Return (x1 != x2) element-wise.

### Navigation

- index
- modules |
- modules |
- next |
- previous |
- NumPy v1.7 Manual (DRAFT) »
- NumPy Reference »
- Routines »