我在程序包中经常使用rlang :: sym，但出现错误：
Warning in loadNamespace(i, c(lib.loc, .libPaths()), versionCheck = vI[[i]]) :
there is no package called ‘sym’
在Rstudio中运行支票时
命名空间具有
import(sym)
但是我在包装中的任何地方都没有@importFrom sym，@import sym或library(sym)。有什么想法如何产生的吗？
我的sessionInfo（）是
R version 3.5.1 (2018-07-02)
Platform: x86_64-pc-linux-gnu (64-bit)
Running under: Ubuntu 16.04.5 LTS
Matrix products: default
BLAS: /usr/lib/openblas-base/libblas.so.3
LAPACK: /usr/lib/libopenblasp-r0.2.18.so
locale:
[1] LC_CTYPE=en_US.UTF-8 LC_NUMERIC=C LC_TIME=en_US.UTF-8 LC_COLLATE=en_US.UTF-8 LC_MONETARY=en_US.UTF-8
[6] LC_MESSAGES=en_US.UTF-8 LC_PAPER=en_US.UTF-8 LC_NAME=C LC_ADDRESS=C LC_TELEPHONE=C
[11] LC_MEASUREMENT=en_US.UTF-8 LC_IDENTIFICATION=C
attached base packages:
[1] stats graphics grDevices utils datasets methods base
other attached packages:
[1] EndoMineR_0.0.0.9000
loaded via a namespace (and not attached):
[1] Rcpp_1.0.0 rstudioapi_0.7 bindr_0.1.1 xml2_1.2.0 magrittr_1.5 munsell_0.5.0 tidyselect_0.2.5 colorspace_1.3-2
[9] tm_0.7-6 R6_2.3.0 rlang_0.3.1 stringr_1.3.1 plyr_1.8.4 dplyr_0.7.8 tools_3.5.1 parallel_3.5.1
[17] grid_3.5.1 gtable_0.2.0 data.table_1.11.8 lazyeval_0.2.1 yaml_2.2.0 assertthat_0.2.0 tibble_1.4.2 crayon_1.3.4
[25] bindrcpp_0.2.2 NLP_0.2-0 tidyr_0.8.2 purrr_0.2.5 ggplot2_3.1.0 glue_1.3.0 slam_0.1-43 stringi_1.2.4
[33] compiler_3.5.1 pillar_1.3.1 scales_1.0.0 lubridate_1.7.4 pkgconfig_2.0.2