動作環境

sessionInfo()
## R version 4.0.1 (2020-06-06)
## Platform: x86_64-pc-linux-gnu (64-bit)
## Running under: Ubuntu 18.04.4 LTS
## 
## Matrix products: default
## BLAS:   /usr/lib/x86_64-linux-gnu/blas/libblas.so.3.7.1
## LAPACK: /usr/lib/x86_64-linux-gnu/lapack/liblapack.so.3.7.1
## 
## 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] magrittr_1.5       httr_1.4.1         WikipediR_1.5.0    pageviews_0.5.0   
##  [5] gtrendsR_1.4.6     rtweet_0.7.0       ggrepel_0.8.2      gghighlight_0.3.0 
##  [9] rvest_0.3.5        xml2_1.3.2         countrycode_1.2.0  jpndistrict_0.3.7 
## [13] maps_3.3.0         summarytools_0.9.6 skimr_2.1.1        haven_2.3.1       
## [17] readxl_1.3.1       knitr_1.28         forcats_0.5.0      stringr_1.4.0     
## [21] dplyr_1.0.0        purrr_0.3.4        readr_1.3.1        tidyr_1.1.0       
## [25] tibble_3.0.1       ggplot2_3.3.1      tidyverse_1.3.0   
## 
## loaded via a namespace (and not attached):
##  [1] colorspace_1.4-1      selectr_0.4-2         pryr_0.1.4           
##  [4] ellipsis_0.3.1        class_7.3-17          leaflet_2.0.3        
##  [7] base64enc_0.1-3       fs_1.4.1              rstudioapi_0.11      
## [10] farver_2.0.3          fansi_0.4.1           lubridate_1.7.9      
## [13] codetools_0.2-16      splines_4.0.1         jpmesh_1.2.1         
## [16] jsonlite_1.6.1        anytime_0.3.7         broom_0.5.6          
## [19] dbplyr_1.4.4          shiny_1.4.0.2         compiler_4.0.1       
## [22] backports_1.1.7       assertthat_0.2.1      Matrix_1.2-18        
## [25] fastmap_1.0.1         cli_2.0.2             later_1.1.0.1        
## [28] prettyunits_1.1.1     htmltools_0.4.0       tools_4.0.1          
## [31] gtable_0.3.0          glue_1.4.1            Rcpp_1.0.4.6         
## [34] cellranger_1.1.0      vctrs_0.3.1           nlme_3.1-147         
## [37] crosstalk_1.1.0.1     xfun_0.14             mime_0.9             
## [40] miniUI_0.1.1.1        lifecycle_0.2.0       MASS_7.3-51.6        
## [43] scales_1.1.1          hms_0.5.3             promises_1.1.1       
## [46] RColorBrewer_1.1-2    yaml_2.2.1            curl_4.3             
## [49] pander_0.6.3          stringi_1.4.6         highr_0.8            
## [52] e1071_1.7-3           checkmate_2.0.0       repr_1.1.0           
## [55] rlang_0.4.6           pkgconfig_2.0.3       matrixStats_0.56.0   
## [58] evaluate_0.14         lattice_0.20-41       sf_0.9-3             
## [61] rapportools_1.0       htmlwidgets_1.5.1     labeling_0.3         
## [64] tidyselect_1.1.0      plyr_1.8.6            bookdown_0.19        
## [67] R6_2.4.1              magick_2.3            generics_0.0.2       
## [70] DBI_1.1.0             pillar_1.4.4          withr_2.2.0          
## [73] mgcv_1.8-31           units_0.6-6           modelr_0.1.8         
## [76] crayon_1.3.4          KernSmooth_2.23-17    rmarkdown_2.2        
## [79] progress_1.2.2        grid_4.0.1            isoband_0.2.1        
## [82] blob_1.2.1            reprex_0.3.0          digest_0.6.25        
## [85] classInt_0.4-3        xtable_1.8-4          httpuv_1.5.4         
## [88] openssl_1.4.1         munsell_0.5.0         askpass_1.1          
## [91] tcltk_4.0.1           googlePolylines_0.7.2