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Original link: http://tecdat.cn/?p=18726 Original source: Tuo end data tribal official account_ Self organization_ Mapped neural network (SOM) is an unsupervised data visualization technology, which can be used to visualize high-dimensional data sets in low-dimensional (usually 2-dimensional) representation. In this article, we studied how to u ...

T-test is a statistical technique that can tell people how significant the difference between two groups of data is. It is achieved by comparing the semaphore (measured by the difference between samples or population averages) with the amount of noise (or change) in these samples. There are many useful articles that will tell you what t-tests a ...

1 exploratory data analysis Data were used: Pima Indian diabetes prediction dataset. Link: https://pan.baidu.com/s/17M7UfnqGYTkpLmCXUOyTkw Extraction code: y4fz import pandas as pd pima_column_names = ['times_pregnant', 'plasma_glucose_concentration', 'diastolic_blood_pressure', 'triceps_thickness', ' ...

Original link: http://tecdat.cn/?p=25067 This paper describes how to} perform principal component analysis (PCA) using R. You will learn how to} use PCA_ Forecast_ New individual and variable coordinates. We will also provide_ PCA results_ The theory behind it.There are two general methods to perform PCA in R:_ Spectral decomposition_ , check t ...

1. Hype-V virtual machine installation openEuler There are many virtual machine platforms, such as vmware, Hype-V, VirtualBox, etc. Considering the compatibility with wsl2, Hype-V is selected here to install the x86 architecture openEuler Turn on the hype-v virtual machine Download the x86 architecture openEuler image Open the openEuler of ...

1, jq zcat client_log_20211226/*.gz | head -n 10000 | jq .event | sort | uniq -c jq is a lightweight json processing command. json data can be sliced, filtered, mapped and transformed jq . Format and output json data Common options -c compact output json data-s reads all inputs into an array-r outputs the original string instead of a ...

Example analysis of simple crawler With the exchange rate crawler demonstration written before The website has been revised and this crawler code is invalid But let's put it out and give you an introduction to reptiles I am a novice, do not spray import requests from bs4 import BeautifulSoup link = "https://www.msn. Cn / zh CN / money / curr ...

Competition background Based on the analysis of network public opinion, the competition questions require players to conduct data analysis and visualization of brand issues according to users' comments. Through this competition question, we can guide the commonly used data visualization charts and data analysis methods to conduct exploratory d ...

1, Abstract In this paper, we propose a method to analyze the private protocol structure, which can be used in industrial protocols. The method consists of six modules: traffic collection, message extraction, message size clustering, message similarity clustering, field extraction and session analysis. We use Schneider Modicon M580 to coll ...

KMEANS clustering https://www.cnblogs.com/pinard/p/6164214.html 1. Briefly describe the principle and workflow of K-means algorithm K sample points are randomly selected as the initial centroid Calculate the distance from other samples to K centroids respectively, and divide each sample into the nearest cluster For the new cluster, calcul ...