From f047cfff99e00e28c02eb59b6d32386c122f9af6 Mon Sep 17 00:00:00 2001
From: Joseph Redmon <pjreddie@gmail.com>
Date: Sun, 08 Mar 2015 18:31:12 +0000
Subject: [PATCH] renamed sigmoid to logistic
---
src/activations.h | 14 +++++++++++++-
1 files changed, 13 insertions(+), 1 deletions(-)
diff --git a/src/activations.h b/src/activations.h
index d9cf662..0cb81af 100644
--- a/src/activations.h
+++ b/src/activations.h
@@ -3,7 +3,7 @@
#define ACTIVATIONS_H
typedef enum{
- SIGMOID, RELU, LINEAR, RAMP, TANH
+ LOGISTIC, RELU, LINEAR, RAMP, TANH
}ACTIVATION;
ACTIVATION get_activation(char *s);
@@ -18,5 +18,17 @@
void gradient_array_ongpu(float *x, int n, ACTIVATION a, float *delta);
#endif
+static inline float linear_activate(float x){return x;}
+static inline float logistic_activate(float x){return 1./(1. + exp(-x));}
+static inline float relu_activate(float x){return x*(x>0);}
+static inline float ramp_activate(float x){return x*(x>0)+.1*x;}
+static inline float tanh_activate(float x){return (exp(2*x)-1)/(exp(2*x)+1);}
+
+static inline float linear_gradient(float x){return 1;}
+static inline float logistic_gradient(float x){return (1-x)*x;}
+static inline float relu_gradient(float x){return (x>0);}
+static inline float ramp_gradient(float x){return (x>0)+.1;}
+static inline float tanh_gradient(float x){return 1-x*x;}
+
#endif
--
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