diff options
Diffstat (limited to 'numpy/lib/scimath.py')
| -rw-r--r-- | numpy/lib/scimath.py | 38 |
1 files changed, 36 insertions, 2 deletions
diff --git a/numpy/lib/scimath.py b/numpy/lib/scimath.py index f1838fee6..9ca006841 100644 --- a/numpy/lib/scimath.py +++ b/numpy/lib/scimath.py @@ -20,6 +20,7 @@ from __future__ import division, absolute_import, print_function import numpy.core.numeric as nx import numpy.core.numerictypes as nt from numpy.core.numeric import asarray, any +from numpy.core.overrides import array_function_dispatch from numpy.lib.type_check import isreal @@ -94,6 +95,7 @@ def _tocomplex(arr): else: return arr.astype(nt.cdouble) + def _fix_real_lt_zero(x): """Convert `x` to complex if it has real, negative components. @@ -121,6 +123,7 @@ def _fix_real_lt_zero(x): x = _tocomplex(x) return x + def _fix_int_lt_zero(x): """Convert `x` to double if it has real, negative components. @@ -147,6 +150,7 @@ def _fix_int_lt_zero(x): x = x * 1.0 return x + def _fix_real_abs_gt_1(x): """Convert `x` to complex if it has real components x_i with abs(x_i)>1. @@ -173,6 +177,12 @@ def _fix_real_abs_gt_1(x): x = _tocomplex(x) return x + +def _unary_dispatcher(x): + return (x,) + + +@array_function_dispatch(_unary_dispatcher) def sqrt(x): """ Compute the square root of x. @@ -215,6 +225,8 @@ def sqrt(x): x = _fix_real_lt_zero(x) return nx.sqrt(x) + +@array_function_dispatch(_unary_dispatcher) def log(x): """ Compute the natural logarithm of `x`. @@ -261,6 +273,8 @@ def log(x): x = _fix_real_lt_zero(x) return nx.log(x) + +@array_function_dispatch(_unary_dispatcher) def log10(x): """ Compute the logarithm base 10 of `x`. @@ -309,6 +323,12 @@ def log10(x): x = _fix_real_lt_zero(x) return nx.log10(x) + +def _logn_dispatcher(n, x): + return (n, x,) + + +@array_function_dispatch(_logn_dispatcher) def logn(n, x): """ Take log base n of x. @@ -318,8 +338,8 @@ def logn(n, x): Parameters ---------- - n : int - The base in which the log is taken. + n : array_like + The integer base(s) in which the log is taken. x : array_like The value(s) whose log base `n` is (are) required. @@ -343,6 +363,8 @@ def logn(n, x): n = _fix_real_lt_zero(n) return nx.log(x)/nx.log(n) + +@array_function_dispatch(_unary_dispatcher) def log2(x): """ Compute the logarithm base 2 of `x`. @@ -389,6 +411,12 @@ def log2(x): x = _fix_real_lt_zero(x) return nx.log2(x) + +def _power_dispatcher(x, p): + return (x, p) + + +@array_function_dispatch(_power_dispatcher) def power(x, p): """ Return x to the power p, (x**p). @@ -432,6 +460,8 @@ def power(x, p): p = _fix_int_lt_zero(p) return nx.power(x, p) + +@array_function_dispatch(_unary_dispatcher) def arccos(x): """ Compute the inverse cosine of x. @@ -475,6 +505,8 @@ def arccos(x): x = _fix_real_abs_gt_1(x) return nx.arccos(x) + +@array_function_dispatch(_unary_dispatcher) def arcsin(x): """ Compute the inverse sine of x. @@ -519,6 +551,8 @@ def arcsin(x): x = _fix_real_abs_gt_1(x) return nx.arcsin(x) + +@array_function_dispatch(_unary_dispatcher) def arctanh(x): """ Compute the inverse hyperbolic tangent of `x`. |