If the COVID-19 epidemic as a stock factor

This paper uses the WindAlpha single factor research framework of wankuang platform to explore the impact of COVID-19 epidemic on the stock market from the perspective of stock factors. IC analysis found that there was a significant negative correlation between the severity of the epidemic and the retu ...

Posted on Sat, 15 Feb 2020 03:25:17 -0500 by networkguy

Visualization of pneumonia infection types and numbers across provinces using R language based on geographic location

(Visualization of pneumonia infection types and numbers in each province) R language is faceted based on geographic location I don't know if you've seen any pictures like this: at first glance, you thought it was the periodic table of elements (Haha, chemistry is returned to the teacher).In fact, he d ...

Posted on Fri, 24 Jan 2020 22:14:53 -0500 by markduce

R language Bioconductor dependency management & KEGG enrichment analysis & path map & pathview error reporting solution

win10-R language 3.6.2-Bioconductor dependency management & & KEGG enrichment analysis & & path map & & path view error reporting solution 1, Environmental preparation Download the installation package (64 bit) (if there is no turning over the wall, select a domestic source t ...

Posted on Thu, 16 Jan 2020 02:21:10 -0500 by bran

R script reading summary Excel table data

It mainly uses xlsx and rJava package, opens Excel file, reads data of each table, and writes it to summary table. The following figure shows the original data table before processing: The following figure shows the processed data: code implementation Install & load the function implementation of the package. The installed.packages() fu ...

Posted on Mon, 02 Dec 2019 21:25:02 -0500 by ryanwood4

spark machine learning: r/python implementation of decision tree and computing node

spark machine learning decision tree --------Only for personal learning knowledge arrangement and R language / python code arrangement 1. Preface The project uses the decision tree in spark environment, and uses the functions in ml of r and python to learn python sklearn package when returning. ml is not convenient for draw ...

Posted on Tue, 12 Nov 2019 15:04:59 -0500 by InternetX

Realization of R Language in Big Data Tribe: EM Maximum Expectation Estimation of Mixed Normal Distribution

Links to the original text: http://tecdat.cn/?p=4815   Recently, EM maximum expectation estimation method has been used in data analysis, and it is also used in parameter estimation. However, it is found that there are not many examples of EM implementation in R software in China. Most of them are about the implementation of two Gauss mixture ...

Posted on Tue, 06 Aug 2019 01:46:40 -0400 by SQL Advanced

R Language Database

Data is stored in a normalized format in a relational database system. Therefore, we will need very advanced and complex Sql queries for statistical computation. But R language can easily connect to many relational databases, such as MySql, Oracle, Sql servers, and get records from them as data boxes. Once data is avail ...

Posted on Tue, 14 May 2019 07:12:45 -0400 by brailleschool

D02-R Basic Language Learning

R Language Basic Learning-D02 Content outline of 20190 423: Preface 2. Vector operation (1) Routine operation (2) Calculating variable length vectors (3) Sequence (4) Vector deletion and preservation 3. Detailed list (1) Index of lists (2) Listing element attributes (3) Change list elements (4) Delete list elements (5) Merge tw ...

Posted on Mon, 22 Apr 2019 13:27:34 -0400 by p.persia69

Iris R Language Command Toolkit (1)

Iris R Language Command Toolkit (1) Recent data analysis, using R language to do some data processing and visualization, in this note encountered problems, applied commands, processing methods and toolkits to Copyright Statement: This article is the original article of the blogger. Please indicate the address of this article when reproducing it ...

Posted on Thu, 21 Mar 2019 14:21:52 -0400 by jamal dakak

R Language: Common Statistical Testing

Statistical testing is the work of making judgments by comparing the results of sampling with the distribution of sampling. There are five main steps: Establishing hypotheses Sampling Distribution Selective saliency level and negative domain Calculating test statistics Judgment—— Baidu Encyclopedia Hypothesis test, also known a ...

Posted on Thu, 21 Mar 2019 02:00:27 -0400 by prem