如何使用dplyr中的链接访问“内部”变量 [英] How to use chaining in dplyr to access "internal" variables
问题描述
新的(d)plyr,通过链接工作,一个基本问题 - 对于hflights示例,要使用这些嵌入的var之一来制作一个基本的情节: pre> hflights%>%
group_by(Year,Month,DayofMonth)%>%
select(Year:DayofMonth,ArrDelay,DepDelay)%>%
summaryize(
arr = mean(ArrDelay,na.rm = TRUE),
dep = mean(DepDelay,na.rm = TRUE)
)%>%
plot(Month,arr)
match.fun(面板)中的错误:对象'arr'not found
我可以让这项工作逐步进行,但是我可以通过%>%
plot()
不能这样工作。最接近的是:
库(dplyr)
库(hflights)
摘要< - hflights%>%
group_by(Year,Month,DayofMonth)%>%
select(Year:DayofMonth,ArrDelay,DepDelay)%>%
summaryize
arr = mean(ArrDelay,na.rm = TRUE),
dep = mean(DepDelay,na.rm = TRUE)
)
summary%> %
plot(arr〜Month,。)
另一个选择是使用ggvis,明确地设计为使用管道:
library(ggvis)
summary%>%
ggvis (〜月,〜arr)
New to (d)plyr, working through chaining, a basic question - for the hflights example, want to use one of these embedded vars to make a basic plot:
hflights %>%
group_by(Year, Month, DayofMonth) %>%
select(Year:DayofMonth, ArrDelay, DepDelay) %>%
summarise(
arr = mean(ArrDelay, na.rm = TRUE),
dep = mean(DepDelay, na.rm = TRUE)
) %>%
plot (Month, arr)
Error in match.fun(panel) : object 'arr' not found
I can make this work going step by step, but can I get where I want to go somehow with %>%...
plot()
doesn't work that way. The closest you could get is:
library(dplyr)
library(hflights)
summary <- hflights %>%
group_by(Year, Month, DayofMonth) %>%
select(Year:DayofMonth, ArrDelay, DepDelay) %>%
summarise(
arr = mean(ArrDelay, na.rm = TRUE),
dep = mean(DepDelay, na.rm = TRUE)
)
summary %>%
plot(arr ~ Month, .)
Another alternative is to use ggvis, which is explicitly designed to work with pipes:
library(ggvis)
summary %>%
ggvis(~Month, ~arr)
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