我试图通过使用group_by和总结来创建一个包含州和种族枪击事件数量的数据帧,但是我一直收到一个“找不到对象”的错误,指的是我包含的列名,即使它们存在。 我已经尝试过重新启动会话,重新启动R,通过Google搜索答案,查看YouTube上的相关视频,包括group_by和摘要教程,并在Stack Overflow上搜索此处,但找不到任何有帮助...
在使用函数group_by进行数据分组时,如果在for循环中不起作用,可能是由于以下几个原因: 基础概念 group_by是一种常见的数据处理函数,用于将数据按照某个或多个列的值进行分组。在 R 语言中,通常使用dplyr包中的group_by函数来实现这一功能。 相关优势
3. .by / by 和 group_by() 的区别 4. .by 还是 by? dplyr 1.1.0 版本发布 2023/01/31 日,R 语言数据处理利器 dplyr 包的 1.1.0 版本正式发布。 对于这次更新,RStudio 官网十分重视,dplyr 包的开发者之一 Davis Vaughan,亲自在 tidyverse 博客官网www.tidyverse.org/blog/ 连发4 篇博客,对本...
I am getting group_by error in r shiny but not in r studio.I am unable to understand and have tried few hit and trial solutions but they don't seem to work.Can anyone please help. getwd() setwd("C:/Users/Ritwik.Mohapatra/Documents/R") oli_2...
Tips for Rearranging Columns in R – Data Science TutorialsKeep in mind that by altering the value for n in the lag() method, you can also adjust the number of lags that are used.Email Address * The post How to Calculate Lag by Group in R? appeared first on Data Science Tutorials...
The R statistical computing environment is awesome, but weird. How to do database operations in R is a common source of questions. The other day I was looking for an equivalent to SQL group by for R data frames. You need this to compute summary statist..
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In my analysis script I group a df by two variables and then summarise over them. My df is really big (~1,500,000 rows), but this was never a problem and things ran quickly. I recently reinstalled R and all the packages with it, and now the same script takes ages to run (long ...
I have a data frame and I want to sum up some values when they are "TRUE" in certain conditional status, group by their id. str(df); ## Classes ‘tbl_df’, ‘tbl’ and 'data.frame': 540 obs. of 3 variables: ## $ id : int 1 1 1 1 1 1 1 1 1 1 ...
如何每隔n行对列数据求和,包括Rstudio中的非数值型数据 、 我有一个由420行37列组成的数据框架,这些数据来自昆虫领域的采样数据。我尝试每隔5行对列值求和,这样每5行就变成1。此外,我还尝试将数据帧($site,$date,$plot)中的非数字值“折叠”,以便它们适合由我提到的和组成的单个新行。by = gl(ceiling...