28.19 运行环境

sessionInfo()
## R version 4.0.3 (2020-10-10)
## Platform: x86_64-pc-linux-gnu (64-bit)
## Running under: Ubuntu 20.04.2 LTS
## 
## Matrix products: default
## BLAS:   /usr/lib/x86_64-linux-gnu/blas/libblas.so.3.9.0
## LAPACK: /usr/lib/x86_64-linux-gnu/lapack/liblapack.so.3.9.0
## 
## locale:
##  [1] LC_CTYPE=en_US.UTF-8       LC_NUMERIC=C              
##  [3] LC_TIME=en_US.UTF-8        LC_COLLATE=en_US.UTF-8    
##  [5] LC_MONETARY=en_US.UTF-8    LC_MESSAGES=en_US.UTF-8   
##  [7] LC_PAPER=en_US.UTF-8       LC_NAME=C                 
##  [9] 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] dygraphs_1.1.1.6  highcharter_0.8.2 ggfortify_0.4.11  ggplot2_3.3.3    
## [5] formatR_1.9      
## 
## loaded via a namespace (and not attached):
##  [1] zoo_1.8-9         tidyselect_1.1.1  xfun_0.22         bslib_0.2.5      
##  [5] purrr_0.3.4       lattice_0.20-41   colorspace_2.0-1  vctrs_0.3.8      
##  [9] generics_0.1.0    htmltools_0.5.1.1 yaml_2.2.1        utf8_1.2.1       
## [13] rlang_0.4.11      jquerylib_0.1.4   pillar_1.6.0      glue_1.4.2       
## [17] withr_2.4.2       DBI_1.1.1         TTR_0.24.2        lifecycle_1.0.0  
## [21] quantmod_0.4.18   stringr_1.4.0     munsell_0.5.0     gtable_0.3.0     
## [25] htmlwidgets_1.5.3 evaluate_0.14     labeling_0.4.2    knitr_1.33       
## [29] curl_4.3.1        fansi_0.4.2       highr_0.9         broom_0.7.6      
## [33] xts_0.12.1        Rcpp_1.0.6        scales_1.1.1      backports_1.2.1  
## [37] showtext_0.9-2    jsonlite_1.7.2    sysfonts_0.8.3    farver_2.1.0     
## [41] gridExtra_2.3     digest_0.6.27     stringi_1.6.1     showtextdb_3.0   
## [45] rlist_0.4.6.1     bookdown_0.22     dplyr_1.0.6       grid_4.0.3       
## [49] tools_4.0.3       magrittr_2.0.1    sass_0.4.0        tibble_3.1.1     
## [53] crayon_1.4.1      tidyr_1.1.3       pkgconfig_2.0.3   ellipsis_0.3.2   
## [57] data.table_1.14.0 lubridate_1.7.10  assertthat_0.2.1  rmarkdown_2.8    
## [61] R6_2.5.0          igraph_1.2.6      compiler_4.0.3