Mathematics in Machine learning (4)-Linear discriminant analysis (LDA), principal component analysis (PCA)Copyright Notice:This article is published by Leftnoteasy in Http://leftnoteasy.cnblogs.com, this article can be reproduced or part of the use, but please indicate the source, if there is a problem, please contact [email protected]Objective:The second article

correlation, But not exactly the same concept). In the field of machine learning, the calculation of eigenvalues is used in many places, such as image recognition, PageRank, LDA, and PCA, which will be mentioned later.Image recognition is widely used in the feature face (Eigen faces), extract features face has two purposes, first of all to compress the data, for a picture, only need to save its most important part is, and then to make the program eas

correlation, But not exactly the same concept). In the field of machine learning, the calculation of eigenvalues is used in many places, such as image recognition, PageRank, LDA, and PCA, which will be mentioned later.Image recognition is widely used in the feature face (Eigen faces), extract features face has two purposes, first of all to compress the data, for a picture, only need to save its most important part is, and then to make the program eas

correlation, But not exactly the same concept). In the field of machine learning, the calculation of eigenvalues is used in many places, such as image recognition, PageRank, LDA, and PCA, which will be mentioned later.Image recognition is widely used in the feature face (Eigen faces), extract features face has two purposes, first of all to compress the data, for a picture, only need to save its most important part is, and then to make the program eas

calculation is used in many places, such as image recognition, PageRank, Lda, and PCA, which will be mentioned later.
It is a feature face that is widely used in image recognition. Feature face extraction has two purposes: first, to compress data. For an image, you only need to save the most important part, and thenProgramIt is easier to process. When extracting the main features, a lot of noise is filtered out. The role of

a technique of 1.pandas
Apply () and applymap () are functions of the Dataframe data type, and map () is a function of the series data type. The action object of the Apply () dataframe a column or row of data, Applymap () is element-wise and is used for each of the dataframe data. Map () is also element-wise, calling a function once for each data in series. 2.PCA decomposition of the German DAX30 index
The DAX30 index has 30 stocks, it doesn't sound

principal component Analysis ( Principal Component Analysis , PCA is a multivariate statistical analysis method that transforms multiple variables through a linear transformation to select fewer important variables. principle: When we use the statistical analysis method to s

Principal Component Analysis (PCA) is a multivariate statistical analysis method that uses linear transformation to select a small number of important variables. It is also called Main Component analysis. In practice, many variables (or factors) related to this issue are often proposed for comprehensive

IntroductionPrincipal component Analysis (PCA) is a data dimensionality reduction algorithm which can greatly improve the learning speed of unsupervised features. More importantly, the understanding of PCA algorithm, the implementation of the whitening algorithm has a great help, many algorithms are first used whitening algorithm for preprocessing steps.Suppose y

Abstract:
PCA (principal component analysis) is a multivariate statistical method. PCA uses linear transformation to select a small number of important variables. It can often effectively obtain the most important elements and structures from overly "rich" data information, remove Data Noise and redundancy, and reduce the original complex data dimension, reveals

Principal component Analysis (principal components ANALYSIS,PCA) is a simple machine learning algorithm, the main idea is to reduce the dimension of high-dimensional data processing, to remove redundant information and noise in the data.Algorithm:Input sample: D={x1,x2,⋯,xm} d=\left \{x_{1},x_{2},\cdots, x_{m}\right \}The dimension of low latitude space
Process:

Http://matlabdatamining.blogspot.com/2010/02/principal-components-analysis.htmlEnglish principal components Analysis of the blog, write very good, worried after not open, full text reproduced.Principal Components AnalysisIntroductionReal-world data sets usually exhibit relationships among their variables. These relationships is often linear, or at least approximately so, making them amenable to common analysis

Principle:Principal component Analysis-Stanford Principal component Analysis Method-think tank Principle of PCA (Principal Component analysis) Principal component Analysis and R language case-Library Principle application and calculation steps of principal component

1.PCA Algorithm Overview
introduction of 1.1 PCA algorithm
PCA (Principal Component analysis) is a statistical process that converts a set of observation values of a possible correlation variable into a set of linearly independent variable values by means of an orthogonal transformation, known as the principal compon

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A brief introduction of PCA
1. Related background
After Chenhonghong teacher's "machine learning and Knowledge discovery" and Tihaibo Teacher's "matrix algebra" two courses, quite experience. Recently in the master component analysis and singular value

Principal component Analysis (PCA) is an effective method of compressing and de-noising the data based on the covariance matrix of variables, the idea of PCA is to map n-dimensional features to K-Dimension (KRelated knowledgeIntroduction to a PCA Tutorial: A tutorial on Principal components

1.PCA principlePrincipal component Analysis (Principal Component ANALYSIS,PCA) is a statistical method. An orthogonal transformation transforms a set of variables that may be related to a set of linearly unrelated variables, and the transformed set of variables is called the principal component.PCA algorithm:Implementa

I. INTRODUCTION of PCA
1. Related background
Principal component Analysis (Principal Component ANALYSIS,PCA) is a statistical method. An orthogonal transformation transforms a set of variables that may be related to a set of linearly unrelated variables, and the transformed set of variables is called the principal comp

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