在使用 `dplyr` 包进行数据处理时,重命名多个列是一个常见的需求。`dplyr` 提供了 `rename()` 函数来实现这一功能。如果你想要使用唯一的名称来重命名多个列,可以使用 `tidys...
假设我们有一个包含重复行的数据框 df,并且我们想要根据某一列(例如 column_name)的值来筛选唯一项。 代码语言:txt 复制 # 安装并加载 dplyr 包 install.packages("dplyr") library(dplyr) # 创建示例数据框 df <- data.frame( column_name = c(1, 2, 2, 3, 4, 4, 5), other_column = c("a"...
Column functions return a set of columns as a new table. Use a variant that ends in _ for non-standard evaluation friendly code. select(): keeps only the variables you mention,仅保留你关心的变量 rename(): keeps all variables. 相关函数 函数说明: select(.data, ...) rename(.data, ......
dplyr_data-wrangling-cheatsheet(R语言 dplyr 学习神器)
Select function in R is used to select variables (column) in R using Dplyr package. select column by name, Position, pattern, starts_with ,etc
select()filter()mutate()group_by()arrange() 1)数据框列名的重新命名:names(),colnames(),rename() R base对列名进行修改的话,使用如下格式, # R base names(df)[2] <- c('popularity') # dplyr df <- df %>% rename(popularity = score) ...
positions2 = setNames(positions, c("worker", "position")) # rename first column in 'positions' #--如果两数据库不同名需要合并,使用等号匹配列名 workers %>% inner_join_dt(positions2, by = c("name" = "worker")) # 等价 workers %...
positions2 = setNames(positions, c("worker", "position")) # rename first column in 'positions' #--如果两数据库不同名需要合并,使用等号匹配列名 workers %>% inner_join_dt(positions2, by = c("name" = "worker")) # 等价 workers %>% ijoin(positions2,by = "name==worker") ...
Drop column by position in R Dplyr: Drop 3rd, 4thand 5thcolumns of the dataframe: In order to drop column by column position we will be passing the column position as a vector to the select function with negative sign as shown below. ...
rename_vars()gains astrictargument to control if an error is thrown when you try and rename a variable that doesn't exist. Fixed undefined behavior forslice()on a zero-column data frame (#2490). Fixed very rare case of false match during join (#2515). ...