greet <-function(name) {paste0("How do you do, ", name, "?") }greet("Hadley") ##[1]"How do you do, Hadley?" 另一个方法是使用glue包:“unquote”一个字符串内容(就是取消引号),用R表达式的值替换字符串。这就优雅地实现我们的函数,因为{name}被替换为name参数的值。 greet <-function(na...
greet <- function(name) { paste0("How do you do, ", name, "?") } greet("Hadley") ## [1] "How do you do, Hadley?" 1. 2. 3. 4. 5. 另一个方法是使用glue包:“unquote”一个字符串内容(就是取消引号),用R表达式的值替换字符串。这就优雅地实现我们的函数,因为{name}被替换为name...
Data Manipulation in R With dplyr Package. Grouping Pipe Operator Sample() It is used to generate a sample of a specific size from a vector or a dataset, either with or without replacement. The basic syntax of sample() function is as follows: sample(data, size, replace = FALSE, prob =...
# Create a data frame with missing data d<-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 ht data select(d,starts_with("ht")) # -startswith() f...
本部分主要是引用 Programming with dplyr: cloud.r-project.org/web 原文概念性东西较多且复杂不易理解,先尝试会使用,概念再慢慢消化理解。 虽然复杂但是比较实用,尤其是当我们需要定义一些通用功能函数时 以下是对原文引用,建议直接阅读原文 两种情况: When you have the data-variable in a function argument (i...
intersect function in R : Intersection of two data frames in R can be easily achieved by using intersect Function in Dplyr package . Dplyr package in R is ...
you’ll be equipped with strategies for solving these errors via the rlang package. You’ll also learn other techniques for programming with dplyr using data from the World Bank and International Monetary Fund to analyze worldwide trends throughout. You’ll be a tidyverse function writing ninja ...
问使用dplyr按组计算任意数目随机名称列的和相对比例EN我想按组计算数据帧的每一列(除了分组列)的相对...
Case when statement in R Dplyr Package using case_when() Function本文重点介绍 R 编程语言中使用 Dplyr 包中的 case_when() 函数的 case when 语句。 Case when 是一种机制,我们可以使用它来向量化一堆 if 和 else if 语句。简而言之,使用 case when 语句我们评估条件表达式,并基于此做出决策。例如,假设...
inautomatically.Usechainand...whenworkinginteractive;usechain_q andcallswhencallingfromanotherfunction. envEnvironmentinwhichtoevaluationexpressions.Inordinaryoperationyou shouldnotneedtosetthisparameter. lhs,rhsAdatasetandfunctiontoapplytoit Details Thefunctionsworkviasimplesubstitutionsothatx%%f(y)istranslatedintof...