[python-arrayfire] 129/250: FEAT: Adding sigmoid function

[Ghislain Vaillant]

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ghisvail-guest pushed a commit to branch debian/master
in repository python-arrayfire.

commit 718f1cc7de4028eb8f14ac42fb3a5eacda246c6d
Author: Pavan Yalamanchili <pavan at arrayfire.com>
Date:   Tue Nov 10 08:24:08 2015 -0500

    FEAT: Adding sigmoid function
---
 arrayfire/arith.py    | 20 ++++++++++++++++++++
 tests/simple/arith.py |  1 +
 2 files changed, 21 insertions(+)

diff --git a/arrayfire/arith.py b/arrayfire/arith.py
index cb88644..9dc8c66 100644
--- a/arrayfire/arith.py
+++ b/arrayfire/arith.py
@@ -698,6 +698,26 @@ def pow2(a):
     """
     return _arith_unary_func(a, backend.get().af_pow2)
 
+def sigmoid(a):
+    """
+    Raise 2 to the power of each element in input.
+
+    Parameters
+    ----------
+    a : af.Array
+        Multi dimensional arrayfire array.
+
+    Returns
+    --------
+    out : af.Array
+         array where each element is outout of a sigmoid function for the corresponding value from `a`.
+
+    Note
+    -------
+    `a` must not be complex.
+    """
+    return _arith_unary_func(a, backend.get().af_sigmoid)
+
 def exp(a):
     """
     Exponential of each element in the array.
diff --git a/tests/simple/arith.py b/tests/simple/arith.py
index d70bad1..e55881e 100644
--- a/tests/simple/arith.py
+++ b/tests/simple/arith.py
@@ -173,6 +173,7 @@ def simple_arith(verbose = False):
     display_func(af.root(a, b))
     display_func(af.pow(a, b))
     display_func(af.pow2(a))
+    display_func(af.sigmoid(a))
     display_func(af.exp(a))
     display_func(af.expm1(a))
     display_func(af.erf(a))

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