1.1 data set source
The data in this case comes from the real data of Toronto in 2018-2019 on Airbnb website.The data set contains the listing data set, with about 20000 pieces of data, recording all the house information, including dozens of information fields including price.Another data set in the data set is calendar, which ...
Posted by direction on Sat, 25 Sep 2021 12:33:12 +0200
Single line function
Single line function: Operation data object Accept parameters and return a result Transform only one row One result per row Data types can be converted Can be nested The parameter can be a column or a value function_name [(arg1, arg2,...)]
Single-Row Functions Character function
LOWER('SQL Course')--sql course
Posted by DK_Sun on Sun, 19 Sep 2021 10:46:53 +0200
Introduction to pandas
numpy can help us with numeric data, but that's not enough. Many times, our data includes not only numeric values, but also strings, time series, and so on. That's where we need pandas to help us with them. What is Pandas? The Pandas name comes from panel data Pandas is a powerful toolset for analyzing structured data, b ...
Posted by taldos on Sun, 05 Sep 2021 19:10:57 +0200
Prior to writing this blog, I wrote a post called Eight Sorts Programmers Have No Reason Not to Know In that blog, there are detailed descriptions of the eight sorting algorithms. The code implementation is mainly implemented by Java code. Recently, there are many sorting algorithms in R language. So I want to reorganize the sorting algorithms ...
Posted by dazzathedrummer on Tue, 14 Jul 2020 18:11:18 +0200
Reference article:4 installation methods of R packageR language pack related commandssetRepositoriesR install.packages() set domestic CRAN imageTsinghua University open source software image stationR language - default mirror settingsR package installation and setting image
It's very difficult for novic ...
Posted by robs99 on Thu, 11 Jun 2020 09:38:56 +0200
R language is mainly used for statistics, so the introduction of the concept of vector will make better statistical calculation. In other languages that cannot introduce vector, they will use cycles to calculate some large-scale data, which is not needed in R language. Let's see the specific usage of vector in R language!
First of all, if we ta ...
Posted by hbuchel on Sat, 22 Feb 2020 16:46:41 +0100
Original Link: https://blog.csdn.net/qq_38854576/article/details/83024468
R, Redundancy Analysis (RDA), ggplot2
_In the ...
Posted by dymon on Thu, 01 Aug 2019 03:45:28 +0200
Data Structure in R Language
In the text, the data structure in R language is summarized and presented by illustration and example.
Mainly includes: vectors, arrays, lists, data boxes, factors, matrices, and some commonly used functions.
Note: The following code can run directly!
Vector, a one-dimensional array for ...
Posted by discofreakboot on Sat, 11 May 2019 15:18:37 +0200