R会话信息中的星号（*）表示法

时间：2019-05-12 06:32:08

标签： r session devtools

我正在使用R的body > h1{ color: gray; } body.dark > h1{ color: white; } 打印会话信息，该信息显示如下。

enter image description here

库名称旁边的星号（*）表示什么？

2 个答案:

答案 0 :(得分：2)

来自?devtools::session_info()

  

*：包装是否附在搜索路径上

您可以使用search()查找搜索路径。例如对我来说显示为

search()

# [1] ".GlobalEnv"           "package:janitor"      "package:xts"          "package:zoo"         
# [5] "package:nycflights13" "package:lubridate"    "package:ggrepel"      "package:data.table"  
# [9] "package:matrixStats"  "package:forcats"      "package:stringr"      "package:purrr"       
#[13] "package:readr"        "package:tidyr"        "package:tibble"       "package:ggplot2"     
#[17] "package:tidyverse"    "package:dplyr"        "tools:rstudio"        "package:stats"       
#[21] "package:graphics"     "package:grDevices"    "package:utils"        "package:datasets"    
#[25] "package:methods"      "Autoloads"            "package:base"

要查找功能，请仔细查看该列表。最好阅读This，以了解搜索路径。

答案 1 :(得分：0)

文档制定时，似乎标记了sessionInfo中所述的“其他附加软件包”或“ *：软件包是否附加到搜索路径”。例如，session_info在调用library(tidyverse)之前返回以下内容：

 package     * version date       lib source        
 assertthat    0.2.1   2019-03-21 [1] CRAN (R 3.6.0)
 backports     1.1.4   2019-04-10 [1] CRAN (R 3.6.0)
 callr         3.2.0   2019-03-15 [1] CRAN (R 3.6.0)
 cli           1.1.0   2019-03-19 [1] CRAN (R 3.6.0)
 crayon        1.3.4   2017-09-16 [1] CRAN (R 3.6.0)
 desc          1.2.0   2018-05-01 [1] CRAN (R 3.6.0)
 devtools      2.0.2   2019-04-08 [1] CRAN (R 3.6.0)
 digest        0.6.18  2018-10-10 [1] CRAN (R 3.6.0)
 fs            1.3.0   2019-05-02 [1] CRAN (R 3.6.0)
 glue          1.3.1   2019-03-12 [1] CRAN (R 3.6.0)
 magrittr      1.5     2014-11-22 [1] CRAN (R 3.6.0)
 memoise       1.1.0   2017-04-21 [1] CRAN (R 3.6.0)
 pkgbuild      1.0.3   2019-03-20 [1] CRAN (R 3.6.0)
 pkgload       1.0.2   2018-10-29 [1] CRAN (R 3.6.0)
 prettyunits   1.0.2   2015-07-13 [1] CRAN (R 3.6.0)
 processx      3.3.0   2019-03-10 [1] CRAN (R 3.6.0)
 ps            1.3.0   2018-12-21 [1] CRAN (R 3.6.0)
 R6            2.4.0   2019-02-14 [1] CRAN (R 3.6.0)
 Rcpp          1.0.1   2019-03-17 [1] CRAN (R 3.6.0)
 remotes       2.0.4   2019-04-10 [1] CRAN (R 3.6.0)
 rlang         0.3.4   2019-04-07 [1] CRAN (R 3.6.0)
 rprojroot     1.3-2   2018-01-03 [1] CRAN (R 3.6.0)
 rstudioapi    0.10    2019-03-19 [1] CRAN (R 3.6.0)
 sessioninfo   1.1.1   2018-11-05 [1] CRAN (R 3.6.0)
 usethis       1.5.0   2019-04-07 [1] CRAN (R 3.6.0)
 withr         2.1.2   2018-03-15 [1] CRAN (R 3.6.0)

调用library(tidyverse)后返回以下内容：

 package     * version date       lib source        
 assertthat    0.2.1   2019-03-21 [1] CRAN (R 3.6.0)
 backports     1.1.4   2019-04-10 [1] CRAN (R 3.6.0)
 broom         0.5.2   2019-04-07 [1] CRAN (R 3.6.0)
 callr         3.2.0   2019-03-15 [1] CRAN (R 3.6.0)
 cellranger    1.1.0   2016-07-27 [1] CRAN (R 3.6.0)
 cli           1.1.0   2019-03-19 [1] CRAN (R 3.6.0)
 colorspace    1.4-1   2019-03-18 [1] CRAN (R 3.6.0)
 crayon        1.3.4   2017-09-16 [1] CRAN (R 3.6.0)
 desc          1.2.0   2018-05-01 [1] CRAN (R 3.6.0)
 devtools      2.0.2   2019-04-08 [1] CRAN (R 3.6.0)
 digest        0.6.18  2018-10-10 [1] CRAN (R 3.6.0)
 dplyr       * 0.8.0.1 2019-02-15 [1] CRAN (R 3.6.0)
 forcats     * 0.4.0   2019-02-17 [1] CRAN (R 3.6.0)
 fs            1.3.0   2019-05-02 [1] CRAN (R 3.6.0)
 generics      0.0.2   2018-11-29 [1] CRAN (R 3.6.0)
 ggplot2     * 3.1.1   2019-04-07 [1] CRAN (R 3.6.0)
 glue          1.3.1   2019-03-12 [1] CRAN (R 3.6.0)
 gtable        0.3.0   2019-03-25 [1] CRAN (R 3.6.0)
 haven         2.1.0   2019-02-19 [1] CRAN (R 3.6.0)
 hms           0.4.2   2018-03-10 [1] CRAN (R 3.6.0)
 httr          1.4.0   2018-12-11 [1] CRAN (R 3.6.0)
 jsonlite      1.6     2018-12-07 [1] CRAN (R 3.6.0)
 lattice       0.20-38 2018-11-04 [1] CRAN (R 3.6.0)
 lazyeval      0.2.2   2019-03-15 [1] CRAN (R 3.6.0)
 lubridate     1.7.4   2018-04-11 [1] CRAN (R 3.6.0)
 magrittr      1.5     2014-11-22 [1] CRAN (R 3.6.0)
 memoise       1.1.0   2017-04-21 [1] CRAN (R 3.6.0)
 modelr        0.1.4   2019-02-18 [1] CRAN (R 3.6.0)
 munsell       0.5.0   2018-06-12 [1] CRAN (R 3.6.0)
 nlme          3.1-139 2019-04-09 [1] CRAN (R 3.6.0)
 pillar        1.3.1   2018-12-15 [1] CRAN (R 3.6.0)
 pkgbuild      1.0.3   2019-03-20 [1] CRAN (R 3.6.0)
 pkgconfig     2.0.2   2018-08-16 [1] CRAN (R 3.6.0)
 pkgload       1.0.2   2018-10-29 [1] CRAN (R 3.6.0)
 plyr          1.8.4   2016-06-08 [1] CRAN (R 3.6.0)
 prettyunits   1.0.2   2015-07-13 [1] CRAN (R 3.6.0)
 processx      3.3.0   2019-03-10 [1] CRAN (R 3.6.0)
 ps            1.3.0   2018-12-21 [1] CRAN (R 3.6.0)
 purrr       * 0.3.2   2019-03-15 [1] CRAN (R 3.6.0)
 R6            2.4.0   2019-02-14 [1] CRAN (R 3.6.0)
 Rcpp          1.0.1   2019-03-17 [1] CRAN (R 3.6.0)
 readr       * 1.3.1   2018-12-21 [1] CRAN (R 3.6.0)
 readxl        1.3.1   2019-03-13 [1] CRAN (R 3.6.0)
 remotes       2.0.4   2019-04-10 [1] CRAN (R 3.6.0)
 rlang         0.3.4   2019-04-07 [1] CRAN (R 3.6.0)
 rprojroot     1.3-2   2018-01-03 [1] CRAN (R 3.6.0)
 rstudioapi    0.10    2019-03-19 [1] CRAN (R 3.6.0)
 rvest         0.3.3   2019-04-11 [1] CRAN (R 3.6.0)
 scales        1.0.0   2018-08-09 [1] CRAN (R 3.6.0)
 sessioninfo   1.1.1   2018-11-05 [1] CRAN (R 3.6.0)
 stringi       1.4.3   2019-03-12 [1] CRAN (R 3.6.0)
 stringr     * 1.4.0   2019-02-10 [1] CRAN (R 3.6.0)
 tibble      * 2.1.1   2019-03-16 [1] CRAN (R 3.6.0)
 tidyr       * 0.8.3   2019-03-01 [1] CRAN (R 3.6.0)
 tidyselect    0.2.5   2018-10-11 [1] CRAN (R 3.6.0)
 tidyverse   * 1.2.1   2017-11-14 [1] CRAN (R 3.6.0)
 usethis       1.5.0   2019-04-07 [1] CRAN (R 3.6.0)
 withr         2.1.2   2018-03-15 [1] CRAN (R 3.6.0)
 xml2          1.2.0   2018-01-24 [1] CRAN (R 3.6.0)

如果将session_info对象转换为常规数据帧，则会看到星号对应于逻辑向量attached：

si <- devtools::session_info()
as.data.frame(si$packages) %>% select(package, attached)

#### OUTPUT ####

                package attached
assertthat   assertthat    FALSE
backports     backports    FALSE
broom             broom    FALSE
callr             callr    FALSE
cellranger   cellranger    FALSE
cli                 cli    FALSE
colorspace   colorspace    FALSE
crayon           crayon    FALSE
desc               desc    FALSE
devtools       devtools    FALSE
digest           digest    FALSE
dplyr             dplyr     TRUE
fansi             fansi    FALSE
forcats         forcats     TRUE
fs                   fs    FALSE
generics       generics    FALSE
ggplot2         ggplot2     TRUE
glue               glue    FALSE
gtable           gtable    FALSE
haven             haven    FALSE
hms                 hms    FALSE
httr               httr    FALSE
jsonlite       jsonlite    FALSE
lattice         lattice    FALSE
lazyeval       lazyeval    FALSE
lubridate     lubridate    FALSE
magrittr       magrittr    FALSE
memoise         memoise    FALSE
modelr           modelr    FALSE
munsell         munsell    FALSE
nlme               nlme    FALSE
pillar           pillar    FALSE
pkgbuild       pkgbuild    FALSE
pkgconfig     pkgconfig    FALSE
pkgload         pkgload    FALSE
plyr               plyr    FALSE
prettyunits prettyunits    FALSE
processx       processx    FALSE
ps                   ps    FALSE
purrr             purrr     TRUE
R6                   R6    FALSE
Rcpp               Rcpp    FALSE
readr             readr     TRUE
readxl           readxl    FALSE
remotes         remotes    FALSE
rlang             rlang    FALSE
rprojroot     rprojroot    FALSE
rstudioapi   rstudioapi    FALSE
rvest             rvest    FALSE
scales           scales    FALSE
sessioninfo sessioninfo    FALSE
stringi         stringi    FALSE
stringr         stringr     TRUE
tibble           tibble     TRUE
tidyr             tidyr     TRUE
tidyselect   tidyselect    FALSE
tidyverse     tidyverse     TRUE
usethis         usethis    FALSE
utf8               utf8    FALSE
withr             withr    FALSE
xml2               xml2    FALSE
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