Question

我想捕获data函数的输出，在该函数中提供包名称，该函数产生静态输出。我想把它变成一个数据帧。

目前，下面给出了静态输出：

data(package = "ggplot2")

我希望它是一个数据帧，实际上从来没有产生外部静态输出。

diamonds                Prices of 50,000 round cut diamonds
economics               US economic time series.
midwest                 Midwest demographics.
movies                  Movie information and user ratings from IMDB.com.
mpg                     Fuel economy data from 1999 and 2008 for 38 popular models of car
msleep                  An updated and expanded version of the mammals sleep dataset.
presidential            Terms of 10 presidents from Eisenhower to Bush W.
seals                   Vector field of seal movements.

Answer 1

这足以让你入门吗？

> data(package = "ggplot2")$results
     Package   LibPath                  Item          
[1,] "ggplot2" "/home/mrdwab/R/library" "diamonds"    
[2,] "ggplot2" "/home/mrdwab/R/library" "economics"   
[3,] "ggplot2" "/home/mrdwab/R/library" "midwest"     
[4,] "ggplot2" "/home/mrdwab/R/library" "movies"      
[5,] "ggplot2" "/home/mrdwab/R/library" "mpg"         
[6,] "ggplot2" "/home/mrdwab/R/library" "msleep"      
[7,] "ggplot2" "/home/mrdwab/R/library" "presidential"
[8,] "ggplot2" "/home/mrdwab/R/library" "seals"       
     Title                                                              
[1,] "Prices of 50,000 round cut diamonds"                              
[2,] "US economic time series."                                         
[3,] "Midwest demographics."                                            
[4,] "Movie information and user ratings from IMDB.com."                
[5,] "Fuel economy data from 1999 and 2008 for 38 popular models of car"
[6,] "An updated and expanded version of the mammals sleep dataset."    
[7,] "Terms of 10 presidents from Eisenhower to Bush W."                
[8,] "Vector field of seal movements."

显然，要获得data.frame的“项目”和“标题”数据，您可以使用：

> data.frame(data(package = "ggplot2")$results)[-c(1, 2)]
          Item                                                             Title
1     diamonds                               Prices of 50,000 round cut diamonds
2    economics                                          US economic time series.
3      midwest                                             Midwest demographics.
4       movies                 Movie information and user ratings from IMDB.com.
5          mpg Fuel economy data from 1999 and 2008 for 38 popular models of car
6       msleep     An updated and expanded version of the mammals sleep dataset.
7 presidential                 Terms of 10 presidents from Eisenhower to Bush W.
8        seals                                   Vector field of seal movements.

捕获数据输出

1 个答案: