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Description
If you use fine-grained settings with show.legend, the legend for a continuous fill variable is not drawn. E.g. this:
library(ggplot2)
library(dplyr)
tribble(
~x1, ~y1, ~x2, ~y2, ~id, ~id_int,
1, 1, 2, 2, "A", 1,
2, 2, 3, 3, "B", 2
) %>%
ggplot(aes(xmin = x1, ymin = y1, xmax = x2, ymax = y2, fill = id_int)) +
# could also do show.legend = c(size = FALSE) here and get the same
# result; in both cases I would have expected the fill legend to show up
geom_rect(show.legend = c(size = FALSE, fill = TRUE))
Created on 2019-07-28 by the reprex package (v0.3.0)
I chose size here as an unrelated variable, it could be anything. This problem also happens on geoms other than rect, so I don't think it's a problem there.
I would expect output that looks like this:
FWIW, with a discrete variable for the fill, it does work as expected:
library(ggplot2)
library(dplyr)
tribble(
~x1, ~y1, ~x2, ~y2, ~id, ~id_int,
1, 1, 2, 2, "A", 1,
2, 2, 3, 3, "B", 2
) %>%
ggplot(aes(xmin = x1, ymin = y1, xmax = x2, ymax = y2, fill = id)) +
# could also do show.legend = c(size = FALSE) here and get the correct result
geom_rect(show.legend = c(size = FALSE, fill = TRUE))
Created on 2019-07-28 by the reprex package (v0.3.0)
I tested on the github version of ggplot2 as of today (2019-07-28). Session info:
R version 3.6.0 (2019-04-26)
Platform: x86_64-w64-mingw32/x64 (64-bit)
Running under: Windows 10 x64 (build 18362)
Matrix products: default
locale:
[1] LC_COLLATE=English_United States.1252 LC_CTYPE=English_United States.1252
[3] LC_MONETARY=English_United States.1252 LC_NUMERIC=C
[5] LC_TIME=English_United States.1252
attached base packages:
[1] stats graphics grDevices utils datasets methods base
other attached packages:
[1] reprex_0.3.0 gganimate_1.0.3 RColorBrewer_1.1-2 cowplot_1.0.0 forcats_0.4.0
[6] modelr_0.1.4 brms_2.9.0 Rcpp_1.0.2 broom_0.5.2 emmeans_1.3.5.1
[11] tidybayes_1.1.0 rstan_2.19.2 StanHeaders_2.18.1-10 ggstance_0.3.2 ggplot2_3.2.0.9000
[16] dplyr_0.8.3 magrittr_1.5
loaded via a namespace (and not attached):
[1] ggnewscale_0.3.0 TH.data_1.0-10 colorspace_1.4-1 ggridges_0.5.1
[5] rsconnect_0.8.15 rprojroot_1.3-2 estimability_1.3 markdown_1.0
[9] base64enc_0.1-3 fs_1.3.1 rstudioapi_0.10 farver_1.1.0
[13] remotes_2.1.0 svUnit_0.7-12 DT_0.7 mvtnorm_1.0-11
[17] dotwhisker_0.5.0 bridgesampling_0.7-2 codetools_0.2-16 splines_3.6.0
[21] knitr_1.23 shinythemes_1.1.2 zeallot_0.1.0 pkgload_1.0.2
[25] bayesplot_1.7.0 packrat_0.5.0 shiny_1.3.2 clipr_0.7.0
[29] compiler_3.6.0 backports_1.1.4 assertthat_0.2.1 Matrix_1.2-17
[33] lazyeval_0.2.2 cli_1.1.0 tweenr_1.0.1 later_0.8.0
[37] htmltools_0.3.6 prettyunits_1.0.2 tools_3.6.0 igraph_1.2.4.1
[41] coda_0.19-3 gtable_0.3.0 glue_1.3.1 reshape2_1.4.3
[45] vctrs_0.2.0 nlme_3.1-140 crosstalk_1.0.0 xfun_0.8
[49] stringr_1.4.0 ps_1.3.0 mime_0.7 miniUI_0.1.1.1
[53] gtools_3.8.1 devtools_2.1.0 MASS_7.3-51.4 zoo_1.8-6
[57] scales_1.0.0 colourpicker_1.0 hms_0.5.0 promises_1.0.1
[61] Brobdingnag_1.2-6 parallel_3.6.0 sandwich_2.5-1 inline_0.3.15
[65] shinystan_2.5.0 curl_4.0 memoise_1.1.0 gridExtra_2.3
[69] loo_2.1.0 stringi_1.4.3 dygraphs_1.1.1.6 desc_1.2.0
[73] pkgbuild_1.0.3 rlang_0.4.0 pkgconfig_2.0.2 matrixStats_0.54.0
[77] evaluate_0.14 lattice_0.20-38 purrr_0.3.2 labeling_0.3
[81] rstantools_1.5.1 htmlwidgets_1.3 processx_3.4.1 tidyselect_0.2.5
[85] plyr_1.8.4 R6_2.4.0 generics_0.0.2 multcomp_1.4-10
[89] whisker_0.3-2 pillar_1.4.2 withr_2.1.2 xts_0.11-2
[93] survival_2.44-1.1 abind_1.4-5 tibble_2.1.3 crayon_1.3.4
[97] arrayhelpers_1.0-20160527 rmarkdown_1.14 progress_1.2.2 usethis_1.5.1
[101] grid_3.6.0 callr_3.3.1 threejs_0.3.1 digest_0.6.20
[105] xtable_1.8-4 tidyr_0.8.3 httpuv_1.5.1 stats4_3.6.0
[109] munsell_0.5.0 sessioninfo_1.1.1 shinyjs_1.0Metadata
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