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, where, casting, order, …])

Test element-wise for finiteness (not infinity or not Not a Number).

isinf(x, /[, out, where, casting, order, …])

Test element-wise for positive or negative infinity.

isnan(x, /[, out, where, casting, order, …])

Test element-wise for NaN and return result as a boolean array.

isnat(x, /[, out, where, casting, order, …])

Test element-wise for NaT (not a time) and return result as a boolean array.

isneginf(x[, out])

Test element-wise for negative infinity, return result as bool array.

isposinf(x[, out])

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)

Check if the array is Fortran contiguous but not C contiguous.

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(element)

Returns True if the type of element is a scalar type.

Logical operations

logical_and(x1, x2, /[, out, where, …])

Compute the truth value of x1 AND x2 element-wise.

logical_or(x1, x2, /[, out, where, casting, …])

Compute the truth value of x1 OR x2 element-wise.

logical_not(x, /[, out, where, casting, …])

Compute the truth value of NOT x element-wise.

logical_xor(x1, x2, /[, out, where, …])

Compute the truth value of x1 XOR x2, element-wise.

Comparison

allclose(a, b[, rtol, atol, equal_nan])

Returns True if two arrays are element-wise equal within a tolerance.

isclose(a, b[, rtol, atol, equal_nan])

Returns a boolean array where two arrays are element-wise equal within a tolerance.

array_equal(a1, a2[, equal_nan])

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, where, casting, …])

Return the truth value of (x1 > x2) element-wise.

greater_equal(x1, x2, /[, out, where, …])

Return the truth value of (x1 >= x2) element-wise.

less(x1, x2, /[, out, where, casting, …])

Return the truth value of (x1 < x2) element-wise.

less_equal(x1, x2, /[, out, where, casting, …])

Return the truth value of (x1 <= x2) element-wise.

equal(x1, x2, /[, out, where, casting, …])

Return (x1 == x2) element-wise.

not_equal(x1, x2, /[, out, where, casting, …])

Return (x1 != x2) element-wise.