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.c | 27 +++++++--------------------
1 files changed, 7 insertions(+), 20 deletions(-)
diff --git a/src/activations.c b/src/activations.c
index 48dce87..7da5ce2 100644
--- a/src/activations.c
+++ b/src/activations.c
@@ -8,8 +8,8 @@
char *get_activation_string(ACTIVATION a)
{
switch(a){
- case SIGMOID:
- return "sigmoid";
+ case LOGISTIC:
+ return "logistic";
case RELU:
return "relu";
case RAMP:
@@ -26,7 +26,7 @@
ACTIVATION get_activation(char *s)
{
- if (strcmp(s, "sigmoid")==0) return SIGMOID;
+ if (strcmp(s, "logistic")==0) return LOGISTIC;
if (strcmp(s, "relu")==0) return RELU;
if (strcmp(s, "linear")==0) return LINEAR;
if (strcmp(s, "ramp")==0) return RAMP;
@@ -35,26 +35,13 @@
return RELU;
}
-float linear_activate(float x){return x;}
-float sigmoid_activate(float x){return 1./(1. + exp(-x));}
-float relu_activate(float x){return x*(x>0);}
-float ramp_activate(float x){return x*(x>0)+.1*x;}
-float tanh_activate(float x){return (exp(2*x)-1)/(exp(2*x)+1);}
-//float tanh_activate(float x){return x - (x*x*x)/3;}
-
-float linear_gradient(float x){return 1;}
-float sigmoid_gradient(float x){return (1-x)*x;}
-float relu_gradient(float x){return (x>0);}
-float ramp_gradient(float x){return (x>0)+.1;}
-float tanh_gradient(float x){return 1-x*x;}
-
float activate(float x, ACTIVATION a)
{
switch(a){
case LINEAR:
return linear_activate(x);
- case SIGMOID:
- return sigmoid_activate(x);
+ case LOGISTIC:
+ return logistic_activate(x);
case RELU:
return relu_activate(x);
case RAMP:
@@ -78,8 +65,8 @@
switch(a){
case LINEAR:
return linear_gradient(x);
- case SIGMOID:
- return sigmoid_gradient(x);
+ case LOGISTIC:
+ return logistic_gradient(x);
case RELU:
return relu_gradient(x);
case RAMP:
--
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