[免责声明:类似的问题已经问了很多遍了。我不认为这与我刚刚阅读的许多线程相同。]
我做了:
library(dplyr)
colnames(LarvalSamples) %<>%
stringr::str_remove_all("_log") %>%
stringr::str_replace_all("Sea_Level", "Sea_Level_Height") %>% #sealevel, sealion, chinook, chl
stringr::str_replace_all("SeaLion", "Sea_lion") %>%
stringr::str_replace_all("Chinook_Salmon", "Salmon") %>%
stringr::str_replace_all("Chlorophyll_a", "Chlorophyll_A")
工作正常,没有消息,按预期/期望输出。然后,我复制/粘贴了前两行,除了终端管:
colnames(LarvalSamples) %<>%
stringr::str_remove_all("_log")
我意识到这里还有其他关于找不到函数的文章,但是
dplyr
已加载并且仅在上面两行上处理了更多代码。碰巧的是,"_log"
中没有colnames
模式,但我尝试了一个确实存在的其他字符模式,但该模式失败了,因此消除了潜在的错误来源。任何想法/猜测都表示赞赏,这比问题tbh更像是个错误,但是如果需要的话,在将其提升到更高层次之前,最好能有敏锐的目光。谢谢。> sessionInfo()
R version 3.5.0 (2018-04-23)
Platform: x86_64-w64-mingw32/x64 (64-bit)
Running under: Windows 10 x64 (build 17134)
Matrix products: default
locale:
[1] LC_COLLATE=English_United Kingdom.1252 LC_CTYPE=English_United Kingdom.1252
[3] LC_MONETARY=English_United Kingdom.1252 LC_NUMERIC=C
[5] LC_TIME=English_United Kingdom.1252
attached base packages:
[1] stats graphics grDevices utils datasets methods base
other attached packages:
[1] dplyr_0.8.0.1 beepr_1.3 gbm.auto_1.2.0
loaded via a namespace (and not attached):
[1] Rcpp_1.0.0 compiler_3.5.0 pillar_1.3.1 shapefiles_0.7 tools_3.5.0 tibble_2.0.1
[7] gtable_0.2.0 lattice_0.20-35 pkgconfig_2.0.2 rlang_0.3.1 Matrix_1.2-14 DBI_1.0.0
[13] rstudioapi_0.9.0 rgdal_1.4-2 gbm_2.1.5 dismo_1.1-4 gridExtra_2.3 stringr_1.4.0
[19] raster_2.8-19 mapplots_1.5.1 rgeos_0.4-2 grid_3.5.0 tidyselect_0.2.5 glue_1.3.0
[25] R6_2.4.0 survival_2.41-3 foreign_0.8-70 sp_1.3-1 purrr_0.3.1 magrittr_1.5
[31] codetools_0.2-15 splines_3.5.0 maptools_0.9-5 assertthat_0.2.0 stringi_1.3.1 crayon_1.3.4
[37] audio_0.1-5.1
更新:下面的可复制示例。这肯定是一个错误。借助全新的系统:
Data <- data.frame(
Name_Bad = sample(1:10),
Name_Guud = sample(1:10)
)
colnames(Data) %<>%
stringr::str_remove_all("_Bad") %>%
stringr::str_replace_all("Guud", "Good")
# Error: could not find function "%>%"
install.packages("dplyr")
library(dplyr)
install.packages("stringr")
library(stringr)
colnames(Data) %<>%
stringr::str_remove_all("_Bad") %>%
stringr::str_replace_all("Guud", "Good")
# no error, worked
colnames(Data) %<>%
stringr::str_remove_all("_Bad")
# Error: could not find function "%<>%"
最佳答案
dplyr不会导出%<>%
(仅%>%
)。您需要加载magrittr。
您的可复制示例遇到了a subtle magrittr bug,它导致对管道表达式的求值在magrittr范围内而不是在调用范围内搜索某些运算符。这样,x %<>% y %>% z
(评估为`%>%`(x %<>% y, z)
)就可以找到并评估magrittr的`%<>%`
运算符。
关于r - 找不到加载了dplyr的函数 “%<>%”,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/63817411/