Tag：overlapping
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Lasso of MATLAB generalized linear model GLM Poisson regression, regularization of elastic network, classification, prediction of test score data and visualization of cross validation
Original link:http://tecdat.cn/?p=24777 Building datasets with redundant predictors and usingLasso and GLMIdentify these predictors. applylassoRegularization to remove redundant prediction variables Create aXA random matrix containing 100 observations and 10 prediction variables.yOnly four predictive variables and a small amount of noise are used to create a normally distributed dependent variable. Default randn ; X* weight + randn*0.1; % […]
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[web front end] ten minutes to thoroughly understand the flex layout
Summarize flex layout attributes in six words: simple, convenient and fast. 1、 Introduction Flex (flexible box: flexible layout box model) is an attribute proposed by W3C in 2009, which can carry out flexible layout of pages concisely and quickly. The main idea is to give the container the ability to control the height and width […]
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Godson’s road to go (I) – install go in Godson
Development tools and Resource Center Help developers work more efficiently and provide tools and resources around the whole life cycle of developers Godson 2 generation go language configuration and installation of go opencv As a rising star of go language, it is very necessary for us to configure the environment required by go language on […]
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How to forecast the market scale
If a coffee brand wants to enter the Shenzhen market, please estimate the sales volume of cup coffee per week in Shenzhen? (unit: RMB 100 million) 1、 Analysis ideas 1. Clear intention Think about why to predict the market size? What is the management’s intention? Are you considering entering the market? Or are you going […]
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Generic extension
Basic essential knowledge Union type vs cross type //Union type interface Bird { name: string; fly(): void;} interface Person { name: string; talk(): void;} type BirdPerson = Bird | Person; let p: BirdPerson = { name: “zfeng”, fly() {} }; let p1: BirdPerson = { name: “zfeng”, talk() {} }; The union type uses “｜” […]
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R language | n k-fold cross validation (based on logistic regression)
Welcome to my official account.A diligent research cat N times of k-fold cross validation catalogue Introduction to k-fold cross validation R language n times k-fold cross validation Comparison of different K values 1. Basic introduction of cross validation Usually, after the model is established, external verification is needed to evaluate the external availability of the […]
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Cross table and pivot table of pandas learning notes
Cross table The crosstab is used to calculate the number of groups of one column of data for another column of data, and find the relationship between the two columns. pd.crosstab(value1, value2)For example, we ask to understand the relationship between the day of the week and the rise and fall of stocks in the following […]
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Cross compile OpenSSL for arm linux Android API GCC tool chain
Cross compile OpenSSL for arm linux Android API GCC tool chain 1. Compilation error problem The Android compilation environment built on Ubuntu 16.04 64bit cross compiles the openssl-1.0.2j generation library of SDK, but when using NDK build, there is an error of “fatal error: invalid – March = option: ` armv5te ‘” 2. Solution useandroid-ndk-r10eThere […]
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R language principal component regression (PCR) and multiple linear regression feature dimensionality reduction analysis vehicle fuel consumption, design and performance data and spectral data
Original link:http://tecdat.cn/?p=24152 What is PCR? （PCR = PCA + MLR） • PCR is a regression technique that processes many x variables• given y and X data:• PCA on X matrix– score: new principal variable• in multivariate linearity_ Return_ (_MLR_) Some of these new variables are used to model / predict y• y may be univariate […]
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Why is the cross entropy and KL divergence approximately equal as a loss function
In this article, we will introduce the concepts of entropy, cross entropy and Kullback Leibler divergence [2], and learn how to approximate them to be equal. Although KL divergence was initially recommended, it is a common practice to use cross entropy in the loss function when building the generated countermeasure network [1]. This often causes […]
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Deepfm of recommended system model
Deepfm of recommended system model Preliminary In some recommendation systems, in order to maximize the total number of clicks, the list of products returned to users will be sorted according to the click through rate (CTR); In the scenario of advertising recommendation, the product order is given by “click through rate X single click revenue” […]
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Cross compilation of libapr on powerpc64 Linux
apryesapacheAn open source library of the company that supports cross platform programming has a good memory management mechanism and supportsLinux、AIXandWindowsAnd other operating systems. The code is written in C language.Recently received a demand, because our customers arepowerpcInstalled on the machineRedhat, which makes our program unable to run, so we thought of cross compilation.And our program […]