合頁損失,鉸鏈損失

Hinge Loss is a loss function used in Machine Learning for training classifiers. The hinge loss is a maximum margin classification loss function and a major part of the SVM algorithm.

鉸鏈損失是機(jī)器學(xué)習(xí)中用于訓(xùn)練分類器的損失函數(shù)。 鉸鏈損失是最大余量分類損失函數(shù)，是SVM算法的主要部分。

Hinge loss function is given by:

鉸鏈損耗函數(shù)由下式給出：

Loss_H = max(0,(1-Y*y))

損耗_H = max(0，(1-Y * y))

Where, Y is the Label and

其中， Y是標(biāo)簽，

y = 𝜭.x

y = 𝜭.x

This is the general Hinge Loss function and in this tutorial, we are going to define a function for calculating the Hinge Loss for a multiple point (having one feature) with given 𝜭.

這是常規(guī)的Hinge Loss函數(shù)，在本教程中，我們將定義一個(gè)函數(shù)，用于計(jì)算給定𝜭的多點(diǎn)(具有一個(gè)特征)的Hinge Loss。

用于多點(diǎn)鉸鏈損失的Python代碼 (Python code for hinge loss for multiple points)

# Linear Algebra Learning Sequence # Hinge loss for Multiple Point import numpy as npdef hinge_loss_single(feature_vector, label, theta, theta_0):ydash = label*(np.matmul(theta,feature_vector) + theta_0)hinge = np.max([0.0, 1 - ydash*label])return hingedef hinge_loss_full(feature_matrix, labels, theta, theta_0):tothinge = 0num = len(feature_matrix)for i in range(num):tothinge = tothinge + hinge_loss_single(feature_matrix[i], labels[i], theta, theta_0)hinge = tothingereturn hingefeature_matrix = np.array([[2,2], [3,3], [7,0], [14,47]]) theta = np.array([0.002,0.6]) theta_0 = 0 labels = np.array([[1], [-1], [1], [-1]])hingell = hinge_loss_full(feature_matrix, labels, theta, theta_0)print('Data point: ', feature_matrix) print('\n\nCorresponding Labels: ', labels) print('\n\n Hingle Loss for given data :', hingell)

Output:

輸出：

Data point: [[ 2 2][ 3 3][ 7 0][14 47]]Corresponding Labels: [[ 1][-1][ 1][-1]]Hingle Loss for given data : [0.986]

翻譯自: https://www.includehelp.com/python/function-for-hinge-loss-for-multiple-points.aspx

合頁損失,鉸鏈損失

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