visLegend: different color for NA values?

[nick-youngblut]

If there are NA values in the node groups, visLegend() defaults to coloring the NA values as blue, but blue is also the default for the first group of the node groups. It would be helpful if the default for NA groups was grey, or if the user can set the color for NA values in the node (edge) groups.

reprex

nodes <- data.frame(id = c(1:3,NA), group = c("B", "A", "B", NA))
edges <- data.frame(from = c(1,2), to = c(2,3))
visNetwork(nodes, edges, width = "100%") %>%
  visLegend()

Output

sessionInfo

R version 4.2.1 (2022-06-23)
Platform: aarch64-apple-darwin20 (64-bit)
Running under: macOS Monterey 12.6

Matrix products: default
LAPACK: /Library/Frameworks/R.framework/Versions/4.2-arm64/Resources/lib/libRlapack.dylib

locale:
[1] en_US.UTF-8/en_US.UTF-8/en_US.UTF-8/C/en_US.UTF-8/en_US.UTF-8

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

other attached packages:
 [1] visNetwork_2.1.2      heatmaply_1.4.0       viridis_0.6.2        
 [4] viridisLite_0.4.1     reactablefmtr_2.0.0   data.tree_1.0.0      
 [7] ape_5.6-2             glue_1.6.2            tidyr_1.2.1          
[10] shinycssloaders_1.0.0 shinyWidgets_0.7.4    shinyBS_0.61.1       
[13] reactable_0.3.0       plotly_4.10.0         ggplot2_3.3.6        
[16] shinyTree_0.2.7       paws_0.1.12           ggtree_3.4.4         
[19] treeio_1.20.2         collapsibleTree_0.1.7 RPostgres_1.4.4      
[22] DBI_1.1.3             tidytable_0.9.0       data.table_1.14.2    
[25] dplyr_1.0.10          jsonlite_1.8.2        httr_1.4.4           
[28] shiny_1.7.2          

loaded via a namespace (and not attached):
 [1] nlme_3.1-157                  lubridate_1.8.0              
 [3] bit64_4.0.5                   webshot_0.5.4                
 [5] RColorBrewer_1.1-3            tools_4.2.1                  
 [7] bslib_0.4.0                   utf8_1.2.2                   
 [9] R6_2.5.1                      lazyeval_0.2.2               
[11] colorspace_2.0-3              withr_2.5.0                  
[13] tidyselect_1.1.2              gridExtra_2.3                
[15] curl_4.3.2                    bit_4.0.4                    
[17] compiler_4.2.1                cli_3.4.1                    
[19] TSP_1.2-1                     labeling_0.4.2               
[21] sass_0.4.2                    scales_1.2.1                 
[23] stringr_1.4.1                 digest_0.6.29                
[25] yulab.utils_0.0.5             R.utils_2.12.2               
[27] ca_0.71.1                     pkgconfig_2.0.3              
[29] htmltools_0.5.3               dbplyr_2.2.1                 
[31] fastmap_1.1.0                 htmlwidgets_1.5.4            
[33] rlang_1.0.6                   rstudioapi_0.14              
[35] farver_2.1.1                  gridGraphics_0.5-1           
[37] jquerylib_0.1.4               generics_0.1.3               
[39] crosstalk_1.2.0               R.oo_1.25.0                  
[41] dendextend_1.16.0             magrittr_2.0.3               
[43] ggplotify_0.1.0               patchwork_1.1.2              
[45] Rcpp_1.0.9                    munsell_0.5.0                
[47] fansi_1.0.3                   R.methodsS3_1.8.2            
[49] lifecycle_1.0.2               stringi_1.7.8                
[51] yaml_2.3.5                    plyr_1.8.8                   
[53] grid_4.2.1                    blob_1.2.3                   
[55] parallel_4.2.1                promises_1.2.0.1             
[57] crayon_1.5.2                  lattice_0.20-45              
[59] hms_1.1.2                     pillar_1.8.1                 
[61] igraph_1.3.5                  reshape2_1.4.4               
[63] paws.common_0.5.1             codetools_0.2-18             
[65] ggfun_0.0.7                   renv_0.15.5                  
[67] BiocManager_1.30.18           vctrs_0.4.2                  
[69] httpuv_1.6.6                  foreach_1.5.2                
[71] gtable_0.3.1                  purrr_0.3.4                  
[73] reactR_0.4.4                  assertthat_0.2.1             
[75] cachem_1.0.6                  mime_0.12                    
[77] xtable_1.8-4                  tidytree_0.4.1               
[79] later_1.3.0                   seriation_1.4.0              
[81] tibble_3.1.8                  iterators_1.0.14             
[83] aplot_0.1.7                   registry_0.5-1               
[85] memoise_2.0.1                 paws.security.identity_0.1.12
[87] ellipsis_0.3.2