From c604f2d9947413b75e5b35f6997458f1f8f89166 Mon Sep 17 00:00:00 2001
From: Joseph Redmon <pjreddie@gmail.com>
Date: Sun, 31 Jan 2016 23:52:03 +0000
Subject: [PATCH] ...
---
src/activations.h | 8 +++++++-
1 files changed, 7 insertions(+), 1 deletions(-)
diff --git a/src/activations.h b/src/activations.h
index d824d1e..7806025 100644
--- a/src/activations.h
+++ b/src/activations.h
@@ -4,7 +4,7 @@
#include "math.h"
typedef enum{
- LOGISTIC, RELU, RELIE, LINEAR, RAMP, TANH, PLSE, LEAKY, ELU
+ LOGISTIC, RELU, RELIE, LINEAR, RAMP, TANH, PLSE, LEAKY, ELU, LOGGY
}ACTIVATION;
ACTIVATION get_activation(char *s);
@@ -21,6 +21,7 @@
static inline float linear_activate(float x){return x;}
static inline float logistic_activate(float x){return 1./(1. + exp(-x));}
+static inline float loggy_activate(float x){return 2./(1. + exp(-x)) - 1;}
static inline float relu_activate(float x){return x*(x>0);}
static inline float elu_activate(float x){return (x >= 0)*x + (x < 0)*(exp(x)-1);}
static inline float relie_activate(float x){return x*(x>0);}
@@ -36,6 +37,11 @@
static inline float linear_gradient(float x){return 1;}
static inline float logistic_gradient(float x){return (1-x)*x;}
+static inline float loggy_gradient(float x)
+{
+ float y = (x+1.)/2.;
+ return 2*(1-y)*y;
+}
static inline float relu_gradient(float x){return (x>0);}
static inline float elu_gradient(float x){return (x >= 0) + (x < 0)*(x + 1);}
static inline float relie_gradient(float x){return (x>0) ? 1 : .01;}
--
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