今天碰到一个奇怪的事情，我在Rsutdio (for windows) 中运行下面的代码之前都能正常做图的，今天运行的时候显示运行成功，但却不显示图像（无论是在rmarkdown中运行还是在console中)。

library(ggplot)
ggplot(mpg,aes(displ,hwy,color=drv))+
  geom_point()+
  scale_color_manual("驱动方式",
                     values=c("red","black","green"),
                     labels=c("四驱","前驱","后驱"))

几番尝试后把上面代码的中文都改为英文后就图形可以正常显示了。这是什么原因呢？有中文怎么才能正常显示呢?

我的系统环境为：

> sessionInfo()
R version 4.3.0 (2023-04-21 ucrt)
Platform: x86_64-w64-mingw32/x64 (64-bit)
Running under: Windows 11 x64 (build 22621)

Matrix products: default


locale:
[1] LC_COLLATE=Chinese (Simplified)_China.utf8 
[2] LC_CTYPE=Chinese (Simplified)_China.utf8   
[3] LC_MONETARY=Chinese (Simplified)_China.utf8
[4] LC_NUMERIC=C                               
[5] LC_TIME=Chinese (Simplified)_China.utf8    

time zone: Asia/Shanghai
tzcode source: internal

attached base packages:
[1] stats     graphics  grDevices utils     datasets  methods   base     

other attached packages:
 [1] showtext_0.9-6  showtextdb_3.0  sysfonts_0.8.8  knitr_1.43     
 [5] plotly_4.10.2   RMariaDB_1.2.2  dbplyr_2.3.2    flextable_0.9.1
 [9] patchwork_1.1.2 lubridate_1.9.2 forcats_1.0.0   stringr_1.5.0  
[13] dplyr_1.1.2     purrr_1.0.1     readr_2.1.4     tidyr_1.3.0    
[17] tibble_3.2.1    ggplot2_3.4.2   tidyverse_2.0.0

loaded via a namespace (and not attached):
 [1] tidyselect_1.2.0        viridisLite_0.4.2       farver_2.1.1           
 [4] blob_1.2.4              fastmap_1.1.1           lazyeval_0.2.2         
 [7] fontquiver_0.2.1        promises_1.2.0.1        digest_0.6.31          
[10] timechange_0.2.0        mime_0.12               lifecycle_1.0.3        
[13] ellipsis_0.3.2          gfonts_0.2.0            magrittr_2.0.3         
[16] compiler_4.3.0          rlang_1.1.1             tools_4.3.0            
[19] utf8_1.2.3              yaml_2.3.7              data.table_1.14.8      
[22] askpass_1.1             labeling_0.4.2          htmlwidgets_1.6.2      
[25] bit_4.0.5               curl_5.0.0              xml2_1.3.4             
[28] httpcode_0.3.0          withr_2.5.0             grid_4.3.0             
[31] fansi_1.0.4             gdtools_0.3.3           xtable_1.8-4           
[34] colorspace_2.1-0        scales_1.2.1            crul_1.4.0             
[37] cli_3.6.0               rmarkdown_2.22          crayon_1.5.2           
[40] ragg_1.2.5              generics_0.1.3          rstudioapi_0.14        
[43] httr_1.4.6              tzdb_0.4.0              readxl_1.4.2           
[46] DBI_1.1.3               parallel_4.3.0          cellranger_1.1.0       
[49] vctrs_0.6.2             jsonlite_1.8.4          fontBitstreamVera_0.1.1
[52] hms_1.1.3               bit64_4.0.5             systemfonts_1.0.4      
[55] glue_1.6.2              stringi_1.7.12          gtable_0.3.3           
[58] later_1.3.1             munsell_0.5.0           pillar_1.9.0           
[61] htmltools_0.5.5         openssl_2.0.6           R6_2.5.1               
[64] textshaping_0.3.6       vroom_1.6.3             evaluate_0.21          
[67] shiny_1.7.4             fontLiberation_0.1.0    httpuv_1.6.11          
[70] Rcpp_1.0.10             zip_2.3.0               uuid_1.1-0             
[73] officer_0.6.2           xfun_0.39               pkgconfig_2.0.3