Python data analysis | Pandas core operating functions

Author: Han Xinzi@ShowMeAITutorial address: http://www.showmeai.tech/tutorials/33Article address: http://www.showmeai.tech/article-detail/146Notice: All Rights Reserved. Please contact the platform and the author for reprint and indicate the sourceWhen we mention python data analysis, pandas will be used for operation in most cases. This is the ...

Posted by websiteguy on Fri, 25 Feb 2022 09:44:23 +0100

Unity Quaternion commonly used API parsing and rotation interpolation animation

1, Quaternion common API s Quaternion.FromToRotation(Vector3 fromDirection, Vector3 toDirection) Official analysis: creates a rotation which revolutions from fromdirection to todirection Create a rotation from the form direction to the target direction Imagine a scenario like this. Let's use quaternion From torotation() API, what should I ...

Posted by jstinehelfer on Fri, 25 Feb 2022 09:42:39 +0100

20220225_ Datawhale 34_ leetcode_7 double pointer

Seven double pointers 1.1 Foundation Collision pointer: refers to two pointers, left and right, pointing to the first element and the last element of the sequence respectively, and then the left pointer increases and the right decreases until the values of the two pointers Collide (i.e. left == right), or meet other special conditions. ...

Posted by ldougherty on Fri, 25 Feb 2022 09:24:46 +0100

Common activation functions

Activation function: The principle of activation layer is to add nonlinear activation function after the output of other layers to increase the nonlinear ability of the network and improve the ability of neural network to fit complex functions. The selection of activation function is very important for the training of neural network. The commo ...

Posted by saronoff on Fri, 25 Feb 2022 09:19:44 +0100

Java classes and objects

1, Object oriented face Object is an idea to solve problems, which mainly depends on the interaction between objects to complete a thing . Process oriented: when a function needs to be implemented, each specific step should be handled in detail Object oriented: when I need to implement a function, I don't care about the specific ...

Posted by PierceCoding on Fri, 25 Feb 2022 09:14:52 +0100

[template] zhinai sauce's static array maintenance problem polynomial (multiple difference array - polynomial processing)

subject Original question link Problem description thinking The advantage of differential array is that it can move the whole body by pulling one hair. By processing one position, the values of subsequent positions can be changed. The operation we are facing at this time is to process the interval, and the processing is not simply ad ...

Posted by Ruiser on Fri, 25 Feb 2022 09:12:05 +0100

[process + vilint] how to build a series of projects

1, Create project sectionCreate a new project using Viteyarn create vite2, ESlint usage sectionAdd ESlintyarn add eslint --devInitialize ESlintyarn run eslint --initAt this time, there will be eslint verification when writing code. Let's configure the verification command of the whole projectConfigure package json "scripts": { //... ...

Posted by engkeb0i on Fri, 25 Feb 2022 08:45:20 +0100

Daily practice LeetCode: M1706 Where does the ball fall

Write in front Today, I found a very interesting little girl named "BugNotFoundException", which is very interesting. Bug s are an indispensable part of a programmer's life. They spend quite a long time with you, and even you have to lose your hair v_v Looking at the data, college students have done so many questions. How did I find ...

Posted by yashvant on Fri, 25 Feb 2022 08:40:38 +0100

LeeCode 190. Reverse binary

190. Reverse binary Simple difficulty Inverts the binary bits of a given 32-bit unsigned integer. Tips: Note that in some languages, such as Java, there is no unsigned integer type. In this case, both input and output will be specified as signed integer types and should not affect your implementation, because the internal binary representat ...

Posted by networkguy on Fri, 25 Feb 2022 08:38:30 +0100

Why use multithreading? How many threads are appropriate to create? What is a thread pool?

Multithreading application Multithreading 1. What is a thread? 1.1 basic concept of task scheduling1.2 basic relationship between process and thread1.3 basic relationship between multithreading and multi-core2. Why use multithreading? 2.1. Application of concurrent scenarios 2.1.1 I/O bound 2.1.1.1 application of ...

Posted by mickeyunderscore on Fri, 25 Feb 2022 08:17:29 +0100