From aebe937710ced03d03f73ab23f410f29685655c1 Mon Sep 17 00:00:00 2001
From: Joseph Redmon <pjreddie@gmail.com>
Date: Thu, 11 Aug 2016 18:54:24 +0000
Subject: [PATCH] what do you even write here?
---
src/activations.c | 83 +++++++++++++++++++++++++++++++----------
1 files changed, 63 insertions(+), 20 deletions(-)
diff --git a/src/activations.c b/src/activations.c
index 48dce87..0cbb2f5 100644
--- a/src/activations.c
+++ b/src/activations.c
@@ -8,16 +8,32 @@
char *get_activation_string(ACTIVATION a)
{
switch(a){
- case SIGMOID:
- return "sigmoid";
+ case LOGISTIC:
+ return "logistic";
+ case LOGGY:
+ return "loggy";
case RELU:
return "relu";
+ case ELU:
+ return "elu";
+ case RELIE:
+ return "relie";
case RAMP:
return "ramp";
case LINEAR:
return "linear";
case TANH:
return "tanh";
+ case PLSE:
+ return "plse";
+ case LEAKY:
+ return "leaky";
+ case STAIR:
+ return "stair";
+ case HARDTAN:
+ return "hardtan";
+ case LHTAN:
+ return "lhtan";
default:
break;
}
@@ -26,41 +42,52 @@
ACTIVATION get_activation(char *s)
{
- if (strcmp(s, "sigmoid")==0) return SIGMOID;
+ if (strcmp(s, "logistic")==0) return LOGISTIC;
+ if (strcmp(s, "loggy")==0) return LOGGY;
if (strcmp(s, "relu")==0) return RELU;
+ if (strcmp(s, "elu")==0) return ELU;
+ if (strcmp(s, "relie")==0) return RELIE;
+ if (strcmp(s, "plse")==0) return PLSE;
+ if (strcmp(s, "hardtan")==0) return HARDTAN;
+ if (strcmp(s, "lhtan")==0) return LHTAN;
if (strcmp(s, "linear")==0) return LINEAR;
if (strcmp(s, "ramp")==0) return RAMP;
+ if (strcmp(s, "leaky")==0) return LEAKY;
if (strcmp(s, "tanh")==0) return TANH;
+ if (strcmp(s, "stair")==0) return STAIR;
fprintf(stderr, "Couldn't find activation function %s, going with ReLU\n", s);
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 LOGGY:
+ return loggy_activate(x);
case RELU:
return relu_activate(x);
+ case ELU:
+ return elu_activate(x);
+ case RELIE:
+ return relie_activate(x);
case RAMP:
return ramp_activate(x);
+ case LEAKY:
+ return leaky_activate(x);
case TANH:
return tanh_activate(x);
+ case PLSE:
+ return plse_activate(x);
+ case STAIR:
+ return stair_activate(x);
+ case HARDTAN:
+ return hardtan_activate(x);
+ case LHTAN:
+ return lhtan_activate(x);
}
return 0;
}
@@ -78,14 +105,30 @@
switch(a){
case LINEAR:
return linear_gradient(x);
- case SIGMOID:
- return sigmoid_gradient(x);
+ case LOGISTIC:
+ return logistic_gradient(x);
+ case LOGGY:
+ return loggy_gradient(x);
case RELU:
return relu_gradient(x);
+ case ELU:
+ return elu_gradient(x);
+ case RELIE:
+ return relie_gradient(x);
case RAMP:
return ramp_gradient(x);
+ case LEAKY:
+ return leaky_gradient(x);
case TANH:
return tanh_gradient(x);
+ case PLSE:
+ return plse_gradient(x);
+ case STAIR:
+ return stair_gradient(x);
+ case HARDTAN:
+ return hardtan_gradient(x);
+ case LHTAN:
+ return lhtan_gradient(x);
}
return 0;
}
--
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