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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 UPPER ...

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 ...

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 ...

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 ...

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 ...

Original Link: https://blog.csdn.net/qq_38854576/article/details/83024468 R, Redundancy Analysis (RDA), ggplot2 _In the ...

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! 1, vector Vector, a one-dimensional array for ...