Programmer Think

step by step1. Introduction to the principle of kNN2. Handwriting dataset test3. Summary of advantages and disadvantages of the algorithm1, Introduction to the principle of kNN1.1 algorithm overviewGiven a training dataset, for a new input instance, find the K instances closest to the instance in the training dataset (that is, the K neighbors m ...

tree Tree is a nonlinear data structure. In the tree, each node contains its own value and its connected child nodes. The line connecting the nodes is called edge. As shown in the following figure, a is the root node and the parent node of B and C, that is, both B and C are child nodes of A. Similarly, B is the parent node of D and E, a ...

1. First effect python [basketball teaching] code is being imitated 2. Operating environment Python version: Python 3.0 7 (there should be no problem with Python 3.5 +). It is recommended to run with jupyter 2.1. Dependency Library: ①opencv-python(4.5.1.48)②Pillow (7.0.0)③moviepy(1.0.3) 2.2 installation method pip install -i h ...

target In this chapter, you will learn Use kNN to build a basic OCR applicationUse the numeric and alphabetic data sets that come with OpenCV OCR of handwritten digits The goal is to build an application that can read handwritten digits. To do this, you need some trains_ Data and test_data . OpenCV git project has a picture digits Png (in ...

catalogue 1 Introduction 2 Genetic Algorithm 2.1 basic concepts of genetic algorithm 2.2 characteristics of genetic algorithm 2.3 program block diagram 3 Python code implementation 3.1 source code implementation 3.2 genetic algorithm package sko GA  3.2.1 case 1 3.2.2 case 2 4 reference 1 Introduction Genetic algorithm (GA ...

object-oriented The core of process oriented programming is the process (pipeline thinking). The advantage is to develop along the execution steps, and the disadvantage is to move the whole body Object oriented OOP is a program idea, which takes the object as the basic unit of the program, and an object contains data and a method of o ...

Article catalog Article catalog Content introduction 1, What is the list? 2, List operation (1) Index of the list (2) Addition and deletion of list elements (3) Sort the list and find the length of the list summary Content introduction This section mainly talks about lists in Python basics, and explains the establishment of lis ...

Systematic learning of regular expressions Concept: Regular expressions are used to find strings that conform to certain patterns, including what string it is, how many times it is repeated, where it is, and what additional constraints. Each sentence here corresponds to a syntax of the regular expression. 1. Seven Realms of regular expression ...

Face recognition aircraft war Do you have the following problems: The college has a garden party. Do you want to find an interactive game to show the characteristics of information specialty?The oars set up the stage to recruit new people. They yelled hard and sent out a lot of leaflets. Can't the atmosphere be lively?After watching the liv ...

Note: this blog is based on Python 3, matplotlib 3.5.1, numpy 1.22.0 preface Visual operation is widely used in data analysis and machine learning. It can help people observe outliers or required data conversion effects more intuitively; As a desktop drawing package of python, matplotlib can generate publishing quality charts; The work ...