From c7b10ceadb1a78e7480d281444a31ae2a7dc1b05 Mon Sep 17 00:00:00 2001
From: Joseph Redmon <pjreddie@gmail.com>
Date: Fri, 06 May 2016 23:25:16 +0000
Subject: [PATCH] so much need to commit
---
src/activations.h | 13 ++++++++++++-
1 files changed, 12 insertions(+), 1 deletions(-)
diff --git a/src/activations.h b/src/activations.h
index 7806025..05f7bca 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, LOGGY
+ LOGISTIC, RELU, RELIE, LINEAR, RAMP, TANH, PLSE, LEAKY, ELU, LOGGY, STAIR
}ACTIVATION;
ACTIVATION get_activation(char *s);
@@ -19,6 +19,12 @@
void gradient_array_ongpu(float *x, int n, ACTIVATION a, float *delta);
#endif
+static inline float stair_activate(float x)
+{
+ int n = floor(x);
+ if (n%2 == 0) return floor(x/2.);
+ else return (x - n) + floor(x/2.);
+}
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;}
@@ -42,6 +48,11 @@
float y = (x+1.)/2.;
return 2*(1-y)*y;
}
+static inline float stair_gradient(float x)
+{
+ if (floor(x) == x) return 0;
+ return 1;
+}
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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