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several improvements #80

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several improvements #80

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4c62609
lecun sigmoid function
matthieu637 Aug 21, 2015
1b2a009
cannot found this file
matthieu637 Aug 21, 2015
553a9a5
fix irprop bug ( sign(0) = 0 )
matthieu637 Oct 2, 2015
32cb043
fix bug in lecun activation
matthieu637 Nov 2, 2015
a3863a7
new feature : labels can be associated with a weight for their import…
matthieu637 Dec 23, 2015
cc68429
possibility to define own error function
matthieu637 May 12, 2016
e0c83d0
compute l1/l2 norm
matthieu637 May 15, 2016
c169f27
l2 normalization
matthieu637 Jul 12, 2016
4fbe9c8
relu
matthieu637 Sep 15, 2016
97882a1
Merge branch 'master' of github.com:matthieu637/fann
matthieu637 Sep 19, 2016
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2 changes: 2 additions & 0 deletions src/fann_train.c
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Original file line number Diff line number Diff line change
Expand Up @@ -46,6 +46,8 @@ fann_type fann_activation_derived(unsigned int activation_function,
case FANN_SIGMOID_STEPWISE:
value = fann_clip(value, 0.01f, 0.99f);
return (fann_type) fann_sigmoid_derive(steepness, value);
case FANN_SIGMOID_SYMMETRIC_LECUN:
return (fann_type) fann_sigmoid_symmetric_lecun_derive(steepness, value);
case FANN_SIGMOID_SYMMETRIC:
case FANN_SIGMOID_SYMMETRIC_STEPWISE:
value = fann_clip(value, -0.98f, 0.98f);
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2 changes: 1 addition & 1 deletion src/include/CMakeLists.txt
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@@ -1,4 +1,4 @@
########### install files ###############

INSTALL_FILES( /include FILES fann.h doublefann.h fann_internal.h floatfann.h fann_data.h fixedfann.h compat_time.h fann_activation.h fann_cascade.h fann_error.h fann_train.h fann_io.h fann_cpp.h )
INSTALL_FILES( /include/fann FILES fann.h doublefann.h fann_internal.h floatfann.h fann_data.h fixedfann.h fann_activation.h fann_cascade.h fann_error.h fann_train.h fann_io.h fann_cpp.h )
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@bukka Removing compat_time.h seems fine, but do we really want headers to be installed in a "fann" subdirectory?


6 changes: 6 additions & 0 deletions src/include/fann_activation.h
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Expand Up @@ -46,6 +46,10 @@ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
#define fann_sigmoid_symmetric_real(sum) (2.0f/(1.0f + exp(-2.0f * sum)) - 1.0f)
#define fann_sigmoid_symmetric_derive(steepness, value) steepness * (1.0f - (value*value))

/* FANN_SIGMOID_SYMMETRIC_LECUN */
#define fann_sigmoid_symmetric_lecun_real(sum) sqrt(3.f) * (2.0f/(1.0f + exp(-2.0f * sum)) - 1.0f)
#define fann_sigmoid_symmetric_lecun_derive(steepness, value) steepness * ( sqrt(3.f) - (value*value)/sqrt(3.f) )

/* FANN_GAUSSIAN */
/* #define fann_gaussian(steepness, sum) (exp(-sum * steepness * sum * steepness)) */
#define fann_gaussian_real(sum) (exp(-sum * sum))
Expand Down Expand Up @@ -97,6 +101,8 @@ switch(activation_function) \
case FANN_SIGMOID: \
result = (fann_type)fann_sigmoid_real(value); \
break; \
case FANN_SIGMOID_SYMMETRIC_LECUN: \
result = (fann_type)fann_sigmoid_symmetric_lecun_real(value); \
case FANN_SIGMOID_SYMMETRIC: \
result = (fann_type)fann_sigmoid_symmetric_real(value); \
break; \
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6 changes: 4 additions & 2 deletions src/include/fann_data.h
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Expand Up @@ -224,7 +224,8 @@ enum fann_activationfunc_enum
FANN_SIN_SYMMETRIC,
FANN_COS_SYMMETRIC,
FANN_SIN,
FANN_COS
FANN_COS,
FANN_SIGMOID_SYMMETRIC_LECUN
};

/* Constant: FANN_ACTIVATIONFUNC_NAMES
Expand Down Expand Up @@ -256,7 +257,8 @@ static char const *const FANN_ACTIVATIONFUNC_NAMES[] = {
"FANN_SIN_SYMMETRIC",
"FANN_COS_SYMMETRIC",
"FANN_SIN",
"FANN_COS"
"FANN_COS",
"FANN_SIGMOID_SYMMETRIC_LECUN"
};

/* Enum: fann_errorfunc_enum
Expand Down