library(dplyr) # 创建一个示例数据框 data <- data.frame( id = 1:5, name = c("Alice", "Bob", "Charlie", "David", "Eve"), age = c(25, 30, 35, 40, 45), gender = c("Female", "Male", "Male", "Male", "Female") ) # 选择name和age列 selected_data <- select(data, na...
Select function in R is used to select variables (columns) in R using Dplyr package. Dplyr package in R is provided with select() function which select the columns based on conditions. We will be using mtcars data to depict the select() function select () Function in Dplyr: 1 2 3 4 ...
Select function in R is used to select variables (column) in R using Dplyr package. select column by name, Position, pattern, starts_with ,etc
我想dplyr::select_if()可能是你要找的。例如
正如Mikko Marttila所建议的，我认为它与使用enquo和!!一样简单。
如果select中出现错误并显示警告消息，则所有列都将重命名为toupper。
001、R 语言中出现如下报错 > a <-1:5> b <- letters[1:5]> test <-data.frame(a, b)>library(dplyr)>select(test, a)Errorin(function (classes, fdef, mtable) : 函数‘select’标签‘"data.frame"’找不到继承方法## 此处报错 002、原因分析 ...
R语言 选择数据框的特定列 - select()函数 R语言中的 select() 函数用于选择数据框的某一列是否被选中。 语法: select(x, expr) 参数: x: 数据框 expr: 选择的条件 例1 : # R program to select specific columns # Loading library library(dplyr) #
# R program toselectspecific columns# Loading librarylibrary(dplyr)# Create a data framed <- data.frame( name = c("Abhi","Bhavesh","Chaman","Dimri"), age = c(7,5,9,16), ht = c(46,NA,NA,69), school = c("yes","yes","no","no") )# startswith() function to print only...
In this case I am interested in first grouping unique Subjects with unique Event1's which I can do easily. From there I need to select Event2 that falls closest to Event1 for that unique Subject-Event1 combination, which I really need help with. For this example these data ...