Question

几天前，我跑了library(caret)，并成功了。从那以后，我更新了Rtools，现在遇到了一些我无法通过常规方法解决的错误

以下错误信息：

> library(caret)
Error: package or namespace load failed for ‘caret’:
 .onLoad failed in loadNamespace() for 'tidyselect', details:
  call: env_get(base_env(), "unlockBinding")
  error: object 'rlang_env_get' not found

与tidyselect类似

> library(tidyselect)
Error: package or namespace load failed for ‘tidyselect’:
 .onLoad failed in loadNamespace() for 'tidyselect', details:
  call: env_get(base_env(), "unlockBinding")
  error: object 'rlang_env_get' not found

我都尝试install.packages和

install.packages("tidyselect", dependencies = c("Depends", "Suggests"))

这样做时，我可以加载tidyselect，但不能加载caret。然后，我决定尝试使用caret：devtools::install_github('topepo/caret/pkg/caret')的github版本。失败并显示了几条错误消息：

Error in is_list(x) : object 'rlang_is_list' not found
Error : unable to load R code in package 'ggplot2'
ERROR: lazy loading failed for package 'ggplot2'
* removing 'C:/.../R/win-library/3.5/ggplot2'
* restoring previous 'C:/.../R/win-library/3.5/ggplot2'

和

Error : .onLoad failed in loadNamespace() for 'tidyselect', details:
  call: env_get(base_env(), "unlockBinding")
  error: object 'rlang_env_get' not found
ERROR: lazy loading failed for package 'caret'

sessionInfo（）：

R version 3.5.0 (2018-04-23)
Platform: x86_64-w64-mingw32/x64 (64-bit)
Running under: Windows >= 8 x64 (build 9200)

关于我应该看什么的任何想法都很棒。谢谢，乔尼

Answer 1

https://community.rstudio.com/t/difficulty-installing-dev-version-of-ggplot2-due-to-rlang-is-list-not-being-found/8169/8

删除并重新安装rlang可以解决问题：）

插入符：未找到“ rlang_env_get”

1 个答案: