Dates shown as integers in legend

[LDalby]

I noticed that dates are handled differently in scico compared to the default handling in ggplot2. In the example below I color by date which is shown correctly in the legend of the default color scale whereas it is treated as integer (I think) in scico (perhaps by creating the breaks vector with : rather than seq)

library(lubridate)
#> 
#> Attaching package: 'lubridate'
#> The following objects are masked from 'package:base':
#> 
#>     date, intersect, setdiff, union
library(ggplot2)

tibble::tibble(x = 1:10,
       y = 1:10,
       date = seq(as_date("2023-01-01"), as_date("2023-01-10"), 1)) |> 
  ggplot() +
  geom_point(aes(x,y, by = date, color = date))
#> Warning in geom_point(aes(x, y, by = date, color = date)): Ignoring unknown
#> aesthetics: by

tibble::tibble(x = 1:10,
               y = 1:10,
               date = seq(as_date("2023-01-01"), as_date("2023-01-10"), 1)) |> 
  ggplot() +
  geom_point(aes(x,y, color = date)) +
  scico::scale_color_scico()

^{Created on 2023-09-04 with reprex v2.0.2}

Session info

sessioninfo::session_info()
#> ─ Session info ───────────────────────────────────────────────────────────────
#>  setting  value
#>  version  R version 4.3.1 (2023-06-16)
#>  os       macOS Ventura 13.5.1
#>  system   aarch64, darwin20
#>  ui       X11
#>  language (EN)
#>  collate  en_US.UTF-8
#>  ctype    en_US.UTF-8
#>  tz       Europe/Copenhagen
#>  date     2023-09-04
#>  pandoc   3.1.1 @ /Applications/RStudio.app/Contents/Resources/app/quarto/bin/tools/ (via rmarkdown)
#> 
#> ─ Packages ───────────────────────────────────────────────────────────────────
#>  package     * version date (UTC) lib source
#>  cli           3.6.1   2023-03-23 [1] CRAN (R 4.3.0)
#>  colorspace    2.1-0   2023-01-23 [1] CRAN (R 4.3.0)
#>  curl          5.0.2   2023-08-14 [1] CRAN (R 4.3.0)
#>  digest        0.6.33  2023-07-07 [1] CRAN (R 4.3.0)
#>  dplyr         1.1.2   2023-04-20 [1] CRAN (R 4.3.0)
#>  evaluate      0.21    2023-05-05 [1] CRAN (R 4.3.0)
#>  fansi         1.0.4   2023-01-22 [1] CRAN (R 4.3.0)
#>  farver        2.1.1   2022-07-06 [1] CRAN (R 4.3.0)
#>  fastmap       1.1.1   2023-02-24 [1] CRAN (R 4.3.0)
#>  fs            1.6.3   2023-07-20 [1] CRAN (R 4.3.0)
#>  generics      0.1.3   2022-07-05 [1] CRAN (R 4.3.0)
#>  ggplot2     * 3.4.3   2023-08-14 [1] CRAN (R 4.3.0)
#>  glue          1.6.2   2022-02-24 [1] CRAN (R 4.3.0)
#>  gtable        0.3.4   2023-08-21 [1] CRAN (R 4.3.1)
#>  highr         0.10    2022-12-22 [1] CRAN (R 4.3.0)
#>  htmltools     0.5.6   2023-08-10 [1] CRAN (R 4.3.0)
#>  knitr         1.43    2023-05-25 [1] CRAN (R 4.3.0)
#>  labeling      0.4.2   2020-10-20 [1] CRAN (R 4.3.0)
#>  lifecycle     1.0.3   2022-10-07 [1] CRAN (R 4.3.0)
#>  lubridate   * 1.9.2   2023-02-10 [1] CRAN (R 4.3.0)
#>  magrittr      2.0.3   2022-03-30 [1] CRAN (R 4.3.0)
#>  munsell       0.5.0   2018-06-12 [1] CRAN (R 4.3.0)
#>  pillar        1.9.0   2023-03-22 [1] CRAN (R 4.3.0)
#>  pkgconfig     2.0.3   2019-09-22 [1] CRAN (R 4.3.0)
#>  purrr         1.0.2   2023-08-10 [1] CRAN (R 4.3.0)
#>  R.cache       0.16.0  2022-07-21 [1] CRAN (R 4.3.0)
#>  R.methodsS3   1.8.2   2022-06-13 [1] CRAN (R 4.3.0)
#>  R.oo          1.25.0  2022-06-12 [1] CRAN (R 4.3.0)
#>  R.utils       2.12.2  2022-11-11 [1] CRAN (R 4.3.0)
#>  R6            2.5.1   2021-08-19 [1] CRAN (R 4.3.0)
#>  reprex        2.0.2   2022-08-17 [1] CRAN (R 4.3.0)
#>  rlang         1.1.1   2023-04-28 [1] CRAN (R 4.3.0)
#>  rmarkdown     2.24    2023-08-14 [1] CRAN (R 4.3.0)
#>  rstudioapi    0.15.0  2023-07-07 [1] CRAN (R 4.3.0)
#>  scales        1.2.1   2022-08-20 [1] CRAN (R 4.3.0)
#>  scico         1.5.0   2023-08-14 [1] CRAN (R 4.3.0)
#>  sessioninfo   1.2.2   2021-12-06 [1] CRAN (R 4.3.0)
#>  styler        1.10.1  2023-06-05 [1] CRAN (R 4.3.0)
#>  tibble        3.2.1   2023-03-20 [1] CRAN (R 4.3.0)
#>  tidyselect    1.2.0   2022-10-10 [1] CRAN (R 4.3.0)
#>  timechange    0.2.0   2023-01-11 [1] CRAN (R 4.3.0)
#>  utf8          1.2.3   2023-01-31 [1] CRAN (R 4.3.0)
#>  vctrs         0.6.3   2023-06-14 [1] CRAN (R 4.3.0)
#>  withr         2.5.0   2022-03-03 [1] CRAN (R 4.3.0)
#>  xfun          0.40    2023-08-09 [1] CRAN (R 4.3.0)
#>  xml2          1.3.5   2023-07-06 [1] CRAN (R 4.3.0)
#>  yaml          2.3.7   2023-01-23 [1] CRAN (R 4.3.0)
#> 
#>  [1] /Library/Frameworks/R.framework/Versions/4.3-arm64/Resources/library
#> 
#> ──────────────────────────────────────────────────────────────────────────────

[m-clark]

This appears to be the case if you add any color scale to that example, so is probably a general scaling/ggplot issue not specific to scico.

library(tidyverse)

tibble::tibble(x = 1:10,
               y = 1:10,
               date = seq(as_date("2023-01-01"), as_date("2023-01-10"), 1)) |> 
  ggplot() +
  geom_point(aes(x,y, color = date)) +
  scale_color_gradient()

^{Created on 2023-09-14 with reprex v2.0.2}