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Machine learning watermelon book after class Exercise 3.4 -- python solution cross validation and the right rate regression error rate of leave one method Watermelon book P69 3.3 select two UCI data sets and compare the error rate of pair rate regression estimated by 10 fold cross validation method and leave one method Dataset: Iris dat ...

1. Install redis for Ubuntu / CentOS (redis5.0.8 does not need to update gcc) https://blog.csdn.net/qq_34246965/article/details/115269542 2. Start redis service and verify If it is in the bin directory under the redis file, the command: redis-server /etc/redis/redis.conf # start redis service If it is in the redis file /bin/redis-server /et ...

preface MySQL is generally installed in three ways: binary version, compiled version and RPM package. The more common is the binary version installation, which is convenient and simple. Compared with the compilation and installation, if it does not pursue the ultimate performance, it is not very different in use. This tutorial takes the binary ...

Original text: https://circuitdigest.com/microcontroller-projects/arduino-fire-fighting-robot-code Fire fighting robot based on Arduino ARDUINO project Pass by** Aswinth Raj **December 20, 2017 According to the National Criminal Records Bureau (NCRB), more than 1.2 million deaths have been caused by fire accidents in India from 2010 to 201 ...

Catalogue of series articles 1, What is spring MVC? What are the controllers servlet, action and controller are all concepts of controller, But only controller is used in actual development. We call it controller directly Step 1: import the jar package Detailed operation The first step is to create a web project and import the jar p ...

abnormal Abnormal conditions refer to abnormal conditions of the program Corresponding to the classification of exceptions in java, exceptions in java: Throwable serious problems: Error, we don't handle them. Such problems are generally very serious. For example, memory overflow (OOM) problems: exceptions (exceptions) compile time exceptions: ...

1, What is a stored procedure Simply put, it is a set of SQL statements with powerful functions. It can realize some complex logic functions, which is a bit similar to a function of an application. Stored procedures are similar to triggers. They are a set of SQL sets, but stored procedures are called actively, and their functions are more pow ...

Java collection framework (III) Map interface Characteristics of Map implementation class Map: double column data, which stores the data of key value pairs, similar to the function of high school, y=f (x) Implementation class: HashMap: as the main implementation class of Map; Unsafe thread and high efficiency; null key s and value s ca ...

[the external chain image transfer fails. The source station may have an anti-theft chain mechanism. It is recommended to save the image and upload it directly (img-xsljaswk-1620260140025)( https://ducafecat.tech/2021/05/06/translation/mastering-flutter-bloc-pattern-for-login-part-1/2021-05-06-08-01-18.png )] original text https://medium.c ...

1, Foundation 1. Language related issues Q: what are the characteristics and advantages of python? Features: python is an interpretive language. The code is interpreted and executed through the interpreter. The code that is executed is interpreted. There is no need to precompile to generate executable files. Disadvantages of interpretive la ...