| | |
| | | #include "math.h" |
| | | |
| | | typedef enum{ |
| | | LOGISTIC, RELU, RELIE, LINEAR, RAMP, TANH, PLSE, LEAKY, ELU, LOGGY, STAIR |
| | | LOGISTIC, RELU, RELIE, LINEAR, RAMP, TANH, PLSE, LEAKY, ELU, LOGGY, STAIR, HARDTAN, LHTAN |
| | | }ACTIVATION; |
| | | |
| | | ACTIVATION get_activation(char *s); |
| | |
| | | if (n%2 == 0) return floor(x/2.); |
| | | else return (x - n) + floor(x/2.); |
| | | } |
| | | static inline float hardtan_activate(float x) |
| | | { |
| | | if (x < -1) return -1; |
| | | if (x > 1) return 1; |
| | | return x; |
| | | } |
| | | 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);} |
| | | static inline float relie_activate(float x){return (x>0) ? x : .01*x;} |
| | | static inline float ramp_activate(float x){return x*(x>0)+.1*x;} |
| | | static inline float leaky_activate(float x){return (x>0) ? x : .1*x;} |
| | | static inline float tanh_activate(float x){return (exp(2*x)-1)/(exp(2*x)+1);} |
| | |
| | | return .125*x + .5; |
| | | } |
| | | |
| | | static inline float lhtan_activate(float x) |
| | | { |
| | | if(x < 0) return .001*x; |
| | | if(x > 1) return .001*(x-1) + 1; |
| | | return x; |
| | | } |
| | | static inline float lhtan_gradient(float x) |
| | | { |
| | | if(x > 0 && x < 1) return 1; |
| | | return .001; |
| | | } |
| | | |
| | | static inline float hardtan_gradient(float x) |
| | | { |
| | | if (x > -1 && x < 1) return 1; |
| | | return 0; |
| | | } |
| | | 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) |