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## 19%

### 您將獲得的技能

Logistic RegressionStatistical ClassificationClassification AlgorithmsDecision Tree

1

## Welcome!

8 個視頻 （總計 27 分鐘）, 3 個閱讀材料
8 個視頻
Impact of classification1分鐘
Course overview3分鐘
Outline of first half of course5分鐘
Outline of second half of course5分鐘
Assumed background3分鐘
Let's get started!45
3 個閱讀材料
Important Update regarding the Machine Learning Specialization10分鐘
Slides presented in this module10分鐘

## Linear Classifiers & Logistic Regression

18 個視頻 （總計 78 分鐘）, 2 個閱讀材料, 2 個測驗
18 個視頻
Intuition behind linear classifiers3分鐘
Decision boundaries3分鐘
Linear classifier model5分鐘
Effect of coefficient values on decision boundary2分鐘
Using features of the inputs2分鐘
Predicting class probabilities1分鐘
Review of basics of probabilities6分鐘
Review of basics of conditional probabilities8分鐘
Using probabilities in classification2分鐘
Predicting class probabilities with (generalized) linear models5分鐘
The sigmoid (or logistic) link function4分鐘
Logistic regression model5分鐘
Effect of coefficient values on predicted probabilities7分鐘
Overview of learning logistic regression models2分鐘
Encoding categorical inputs4分鐘
Multiclass classification with 1 versus all7分鐘
Recap of logistic regression classifier1分鐘
2 個閱讀材料
Slides presented in this module10分鐘
Predicting sentiment from product reviews10分鐘
2 個練習
Linear Classifiers & Logistic Regression10分鐘
Predicting sentiment from product reviews24分鐘
2

## Learning Linear Classifiers

18 個視頻 （總計 83 分鐘）, 2 個閱讀材料, 2 個測驗
18 個視頻
Intuition behind maximum likelihood estimation4分鐘
Data likelihood8分鐘
Finding best linear classifier with gradient ascent3分鐘
Learning algorithm for logistic regression3分鐘
Example of computing derivative for logistic regression5分鐘
Interpreting derivative for logistic regression5分鐘
Summary of gradient ascent for logistic regression2分鐘
Choosing step size5分鐘
Careful with step sizes that are too large4分鐘
Rule of thumb for choosing step size3分鐘
(VERY OPTIONAL) Deriving gradient of logistic regression: Log trick4分鐘
(VERY OPTIONAL) Expressing the log-likelihood3分鐘
(VERY OPTIONAL) Deriving probability y=-1 given x2分鐘
(VERY OPTIONAL) Rewriting the log likelihood into a simpler form8分鐘
(VERY OPTIONAL) Deriving gradient of log likelihood8分鐘
Recap of learning logistic regression classifiers1分鐘
2 個閱讀材料
Slides presented in this module10分鐘
Implementing logistic regression from scratch10分鐘
2 個練習
Learning Linear Classifiers12分鐘
Implementing logistic regression from scratch16分鐘

## Overfitting & Regularization in Logistic Regression

13 個視頻 （總計 66 分鐘）, 2 個閱讀材料, 2 個測驗
13 個視頻
Review of overfitting in regression3分鐘
Overfitting in classification5分鐘
Visualizing overfitting with high-degree polynomial features3分鐘
Overfitting in classifiers leads to overconfident predictions5分鐘
Visualizing overconfident predictions4分鐘
(OPTIONAL) Another perspecting on overfitting in logistic regression8分鐘
Penalizing large coefficients to mitigate overfitting5分鐘
L2 regularized logistic regression4分鐘
Visualizing effect of L2 regularization in logistic regression5分鐘
Learning L2 regularized logistic regression with gradient ascent7分鐘
Sparse logistic regression with L1 regularization7分鐘
Recap of overfitting & regularization in logistic regression58
2 個閱讀材料
Slides presented in this module10分鐘
Logistic Regression with L2 regularization10分鐘
2 個練習
Overfitting & Regularization in Logistic Regression16分鐘
Logistic Regression with L2 regularization16分鐘
3

## Decision Trees

13 個視頻 （總計 47 分鐘）, 3 個閱讀材料, 3 個測驗
13 個視頻
Intuition behind decision trees1分鐘
Task of learning decision trees from data3分鐘
Recursive greedy algorithm4分鐘
Learning a decision stump3分鐘
Selecting best feature to split on6分鐘
When to stop recursing4分鐘
Making predictions with decision trees1分鐘
Multiclass classification with decision trees2分鐘
Threshold splits for continuous inputs6分鐘
(OPTIONAL) Picking the best threshold to split on3分鐘
Visualizing decision boundaries5分鐘
Recap of decision trees56
3 個閱讀材料
Slides presented in this module10分鐘
Identifying safe loans with decision trees10分鐘
Implementing binary decision trees10分鐘
3 個練習
Decision Trees22分鐘
Identifying safe loans with decision trees14分鐘
Implementing binary decision trees14分鐘
4

## Preventing Overfitting in Decision Trees

8 個視頻 （總計 40 分鐘）, 2 個閱讀材料, 2 個測驗
8 個視頻
Overfitting in decision trees5分鐘
Principle of Occam's razor: Learning simpler decision trees5分鐘
Early stopping in learning decision trees6分鐘
(OPTIONAL) Motivating pruning8分鐘
(OPTIONAL) Pruning decision trees to avoid overfitting6分鐘
(OPTIONAL) Tree pruning algorithm3分鐘
Recap of overfitting and regularization in decision trees1分鐘
2 個閱讀材料
Slides presented in this module10分鐘
Decision Trees in Practice10分鐘
2 個練習
Preventing Overfitting in Decision Trees22分鐘
Decision Trees in Practice28分鐘

## Handling Missing Data

6 個視頻 （總計 25 分鐘）, 1 個閱讀材料, 1 個測驗
6 個視頻
Strategy 1: Purification by skipping missing data4分鐘
Strategy 2: Purification by imputing missing data4分鐘
Modifying decision trees to handle missing data4分鐘
Feature split selection with missing data5分鐘
Recap of handling missing data1分鐘
1 個閱讀材料
Slides presented in this module10分鐘
1 個練習
Handling Missing Data14分鐘

## 關於 机器学习 專項課程

This Specialization from leading researchers at the University of Washington introduces you to the exciting, high-demand field of Machine Learning. Through a series of practical case studies, you will gain applied experience in major areas of Machine Learning including Prediction, Classification, Clustering, and Information Retrieval. You will learn to analyze large and complex datasets, create systems that adapt and improve over time, and build intelligent applications that can make predictions from data....

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