Based on the principal component analysis of the scores of 50 students in the table below, how many comprehensive variables can be selected to represent the scores of these students in 6 courses?
The data are as follows:
1. Data import and data standardization
> data=read.csv('D:/R languaga_ma ...
Posted on Sat, 13 Jun 2020 02:20:51 -0400 by php_east
First install the module
conda install pyecharts
pip install pyecharts
See the official website for specific operations and introduction of eckarts echarts , I also recommend W3Cschool , and pyecharts can refer to pyecharts official website , very detailed.In the following visualization, options will be introduced first
# Batch imp ...
Posted on Sat, 09 May 2020 11:31:40 -0400 by Jasp182
On Monday of each week, we will summarize the records of all discounted products in the previous week (from the week of last week to Sunday) into an Excel template (for example, the first week of April quality control special purchase acceptance weekly report. xlsm), then we can generate the following report for sending the weekly email report ...
Posted on Fri, 10 Apr 2020 10:32:02 -0400 by Horizon88
Source: Ustinian - kesci.com
Original link: Consumer behavior analysis of CDNow website users
Click on the above link A kind of Direct online operation without environment configuration
1, Project background
CDNow, once an online music retail platform, was invested and acquired by potelsmann Enterta ...
Posted on Mon, 16 Mar 2020 23:48:26 -0400 by roice
Learning notes are mainly written for your own use. If you have any mistakes, please point them out
01 data type
Unlike python, variables can take names with English
score.Tony<-99 # No mistake.
Type of assignment operator
Common ones are < -, =, - >
Posted on Wed, 11 Mar 2020 08:15:43 -0400 by GimbaL
1. Creating matrices and arrays
Before beginning this tutorial, we need to be clear that matrices are special arrays because they are two-dimensional arrays that can be one-dimensional, three-dimensional, or even n-dimensional.
For example, if you want to create a matrix with 20 elements, 4 rows and 5 columns, enter the following code:
> x ...
Posted on Fri, 28 Feb 2020 21:01:51 -0500 by jkatcher
Addition, subtraction, multiplication and division between vectors:
> x <- 1
 1 2 3 4 5 6 7 8 9 10
 2 3 4 5 6 7 8 9 10 11
> x = 1:10
 1 2 3 4 5 6 7 8 9 10
> y = seq(1,100, length.out = 10)
 1 12 23 34 45 56 67 78 89 100
 1 2 ...
Posted on Thu, 27 Feb 2020 02:23:23 -0500 by anikin
The R language makes it very easy to obtain economic data from securities (stocks, bonds, funds, futures (gold, crude oil, etc.), indices, foreign exchange, and the Federal Reserve.Let me elaborate.
The quantstrat package has complete financial data
yahoo provides a wide range of securities data, including stocks, bonds, funds, futures, option ...
Posted on Mon, 24 Feb 2020 12:04:36 -0500 by Jamz
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 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