ModErn Text Analysis
META Enumerates Textual Applications
logistic.h
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1 
9 #ifndef META_CLASSIFY_LOGISTIC_LOSS_H_
10 #define META_CLASSIFY_LOGISTIC_LOSS_H_
11 
12 #include <cmath>
13 #include "classify/loss/loss_function.h"
14 
15 namespace meta
16 {
17 namespace classify
18 {
19 namespace loss
20 {
21 
27 struct logistic : public loss_function
28 {
32  const static std::string id;
33 
34  double loss(double prediction, int expected) const override;
35  double derivative(double prediction, int expected) const override;
36 };
37 }
38 }
39 }
40 #endif
meta::classify::loss::logistic::derivative
double derivative(double prediction, int expected) const override
The derivative of the loss function given a predicted value and the expected result of that predictio...
Definition: logistic.cpp:22
meta::classify::loss::logistic
The logistic loss for SGD algorithms.
Definition: logistic.h:27
meta::classify::loss::loss_function
Base class for all loss functions that can be passed to the sgd classifier.
Definition: loss_function.h:29
meta::classify::loss::logistic::loss
double loss(double prediction, int expected) const override
The loss incurred in assigning the given prediction value, given the correct value of the prediction...
Definition: logistic.cpp:17
meta::classify::loss::logistic::id
static const std::string id
The identifier for this loss function.
Definition: logistic.h:32
meta
The ModErn Text Analysis toolkit is a suite of natural language processing, classification, information retreival, data mining, and other applications of text processing.
Definition: analyzer.h:24
loss_function.h
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