実行環境・バージョン情報

sessionInfo()
## R version 3.5.2 (2018-12-20)
## Platform: x86_64-apple-darwin15.6.0 (64-bit)
## Running under: macOS Mojave 10.14.3
## 
## Matrix products: default
## BLAS: /Library/Frameworks/R.framework/Versions/3.5/Resources/lib/libRblas.0.dylib
## LAPACK: /Library/Frameworks/R.framework/Versions/3.5/Resources/lib/libRlapack.dylib
## 
## locale:
## [1] ja_JP.UTF-8/ja_JP.UTF-8/ja_JP.UTF-8/C/ja_JP.UTF-8/ja_JP.UTF-8
## 
## attached base packages:
## [1] stats     graphics  grDevices utils     datasets  methods   base     
## 
## other attached packages:
##  [1] patchwork_0.0.1     GGally_1.4.0        gcookbook_2.0      
##  [4] bindrcpp_0.2.2      formattable_0.2.0.1 forcats_0.3.0      
##  [7] stringr_1.3.1       dplyr_0.7.8         purrr_0.3.0        
## [10] readr_1.3.1         tidyr_0.8.2         tibble_2.0.1       
## [13] ggplot2_3.1.0       tidyverse_1.2.1    
## 
## loaded via a namespace (and not attached):
##  [1] tidyselect_0.2.5   xfun_0.4           reshape2_1.4.3    
##  [4] haven_1.1.2        lattice_0.20-38    colorspace_1.4-0  
##  [7] generics_0.0.2     htmltools_0.3.6    yaml_2.2.0        
## [10] utf8_1.1.4         rlang_0.3.1        pillar_1.3.1      
## [13] glue_1.3.0         withr_2.1.2        RColorBrewer_1.1-2
## [16] modelr_0.1.2       readxl_1.1.0       bindr_0.1.1       
## [19] plyr_1.8.4         munsell_0.5.0      gtable_0.2.0      
## [22] cellranger_1.1.0   rvest_0.3.2        htmlwidgets_1.3   
## [25] evaluate_0.12      labeling_0.3       knitr_1.21        
## [28] fansi_0.4.0        highr_0.7          broom_0.5.1       
## [31] Rcpp_1.0.0         scales_1.0.0       backports_1.1.3   
## [34] jsonlite_1.6       hms_0.4.2          digest_0.6.18     
## [37] stringi_1.2.4      bookdown_0.9       grid_3.5.2        
## [40] cli_1.0.1          tools_3.5.2        magrittr_1.5      
## [43] lazyeval_0.2.1     crayon_1.3.4       pkgconfig_2.0.2   
## [46] xml2_1.2.0         lubridate_1.7.4    reshape_0.8.7     
## [49] assertthat_0.2.0   rmarkdown_1.11     httr_1.4.0        
## [52] rstudioapi_0.9.0   R6_2.3.0           nlme_3.1-137      
## [55] compiler_3.5.2