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PCA
主成分分析 ( Principal Component Analysis , PCA )或者主元分析。是一种掌握事物主要矛盾的统计分析方法,它可以从多元事物中解析出主要影响因素,揭示事物的本质,简化复杂的问题。计算主成分的目的是将高维数据投影到较低维空间。给定 n 个变量的 m 个观察值,形成一个 n ′ m 的数据矩阵, n 通常比较大。对于一个由多个变量描述的复杂事物,人们难以认识,那么是否可以抓住事物主要方面进行重点分析呢?如果事物的主要方面刚好体现在几个主要变量上,我们只需要将这几个变量分离出来,进行详细分析。但是,在一般情况下,并不能直接找出这样的关键变量。这时我们可以用原有变量的线性组合来表示事物的主要方面, PCA 就是这样一种分析方法。(Principal component analysis (Principal Component Analysis, PCA) or PCA. Is a statistical method to grasp the principal contradiction of things, it can be resolved diverse things out the main factors, revealing the essence of things, simplifying complex problems. The purpose of calculating the main component of high-dimensional data is projected to a lower dimensional space. Given n variables of m observations, forming an n ' m of the data matrix, n is usually large. For a complex matters described by several variables, it is difficult to know, so if you can grab something to focus on key aspects of analysis? If the main aspects of things just reflected on several key variables, we only need to separate out these few variables, for detailed analysis. However, in general, does not directly identify this critical variables. Then we can represent the major aspects of things with a linear combination of the original variables, PCA is one such analysis.)
- 2021-01-28 21:48:40下载
- 积分:1
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MultiSourcesShortestPaths-master
利用python中Dijkstra的包,进行最短路径的算法实现过程(Using Dijkstra package in Python to implement the shortest path algorithm)
- 2020-06-25 09:00:01下载
- 积分:1
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K-mean算法实现客户分类
说明: K-mean算法实现客户分类。
K-Means算法思想:(1)事先确定常数K,常数K意味着最终的聚类类别数,(2)首先随机选定初始点为质心,并通过计算每一个样本与质心之间的相似度(这里为欧式距离),(3)将样本点归到最相似的类中,(4)接着,重新计算每个类的质心(即为类中心),重复这样的过程,直到质心不再改变,最终就确定了每个样本所属的类别以及每个类的质心。(Implementing Customer Classification by K-means Algorithms)
- 2020-06-21 02:00:01下载
- 积分:1
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python算法
使用python语言实现机器学习神经网络算法及其例子
- 2022-02-01 03:31:29下载
- 积分:1
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arcpy生成raster外接矩形shp文件
利用python脚本,调用arcpy工具,提取卫星影像外接矩形适量数据。
- 2021-05-06下载
- 积分:1
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Artificial Intelligence and Machine Learning
说明: 这本书介绍了部分python基础并讨论了人工智能算法,读者将会学习到一些较难的数学话题,例如回归和分类(The book begins by introducing you to Python
and discussing the use of AI search algorithms. You will learn math-heavy
topics, such as regression and classification, illustrated by Python examples.)
- 2020-06-11 09:45:16下载
- 积分:1
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python分析红楼梦
利用python分析红楼梦!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
- 2022-12-06 11:10:03下载
- 积分:1
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matplotlib坐标轴标题等中文显示输出
mac系统里的中文字体在系统font库里,python是不能用自带的font库显示中文的,所以需要调用系统的字体库
- 2022-06-16 12:23:39下载
- 积分:1
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22.LDA_代码
LDA分解,机器学习的高级知识,里面包含具体的LDA源码分析(LDA decomposition, advanced knowledge of machine learning, which contains specific LDA source code analysis)
- 2019-01-02 19:49:57下载
- 积分:1
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ACA_main_ex1
基于python语言,利用蚁群算法求解TSP问题(Based on Python language, ant colony algorithm is used to solve the TSP problem .)
- 2017-10-29 09:54:15下载
- 积分:1