fable, tsibble, ggplot2, the Legend Key on the RHS fails to map forecast interval levels to fill aesthetics, defaulting to black

Machine Learning and Modeling
, ,
1

Hi,

Using fable, tsibble, ggplot2, the Legend Key on the RHS fails to map forecast interval levels to fill aesthetics, defaulting to black.

Here's a minimal example

library(fable)
library(tsibble)
library(ggplot2)

set.seed(123)

# Create a simple time series
data <- tsibble(
  date = yearmonth("2000 Jan") + 0:59,
  value = rnorm(60, 100, 10),
  index = date
)

# Fit a basic ARIMA model
fit <- data |> model(arima = ARIMA(value))

# Generate forecast with intervals
fc <- fit |> forecast(h = 12)

# Minimal autoplot
autoplot(fc, data) +
  ggtitle("Minimal Fan Chart Example")

I have the following package versions

fable: 0.4.1
tsibble: 1.1.6
ggplot2: 4.0.0

Cheers,
Amarjit

2

The autoplot() function for fable objects is in the fabletools package. Using the latest version (0.5.1) works:

library(fable)
#> Loading required package: fabletools
#> Registered S3 method overwritten by 'tsibble':
#>   method               from 
#>   as_tibble.grouped_df dplyr
library(tsibble)
#> 
#> Attaching package: 'tsibble'
#> The following objects are masked from 'package:base':
#> 
#>     intersect, setdiff, union
library(ggplot2)

set.seed(123)

# Create a simple time series
data <- tsibble(
  date = yearmonth("2000 Jan") + 0:59,
  value = rnorm(60, 100, 10),
  index = date
)

# Fit a basic ARIMA model
fit <- data |> model(arima = ARIMA(value))

# Generate forecast with intervals
fc <- fit |> forecast(h = 12)

# Minimal autoplot
autoplot(fc, data) +
  ggtitle("Minimal Fan Chart Example")

Created on 2025-09-13 with reprex v2.1.1

Session info

 
sessioninfo::session_info()
#> ─ Session info ───────────────────────────────────────────────────────────────
#>  setting  value
#>  version  R version 4.5.1 (2025-06-13)
#>  os       KDE neon User Edition
#>  system   x86_64, linux-gnu
#>  ui       X11
#>  language (EN)
#>  collate  en_AU.UTF-8
#>  ctype    en_AU.UTF-8
#>  tz       Australia/Melbourne
#>  date     2025-09-13
#>  pandoc   3.7.0.2 @ /usr/bin/ (via rmarkdown)
#>  quarto   1.8.24 @ /usr/local/bin/quarto
#> 
#> ─ Packages ───────────────────────────────────────────────────────────────────
#>  package        * version    date (UTC) lib source
#>  anytime          0.3.12     2025-07-14 [1] RSPM (R 4.5.1)
#>  cli              3.6.5      2025-04-23 [1] RSPM (R 4.5.0)
#>  curl             7.0.0      2025-08-19 [1] RSPM (R 4.5.0)
#>  dichromat        2.0-0.1    2022-05-02 [1] RSPM
#>  digest           0.6.37     2024-08-19 [1] RSPM
#>  distributional   0.5.0      2024-09-17 [1] RSPM
#>  dplyr            1.1.4      2023-11-17 [1] RSPM (R 4.5.0)
#>  ellipsis         0.3.2      2021-04-29 [1] RSPM
#>  evaluate         1.0.5      2025-08-27 [1] RSPM (R 4.5.0)
#>  fable          * 0.4.1.9000 2025-07-20 [1] Github (tidyverts/fable@4411495)
#>  fabletools     * 0.5.1      2025-09-01 [1] RSPM (R 4.5.0)
#>  farver           2.1.2      2024-05-13 [1] RSPM
#>  fastmap          1.2.0      2024-05-15 [1] RSPM
#>  feasts           0.4.2      2025-08-27 [1] RSPM (R 4.5.0)
#>  fs               1.6.6      2025-04-12 [1] RSPM
#>  generics         0.1.4      2025-05-09 [1] RSPM (R 4.5.0)
#>  ggdist           3.3.3      2025-04-23 [1] RSPM (R 4.5.0)
#>  ggplot2        * 3.5.2      2025-04-09 [1] RSPM (R 4.5.1)
#>  glue             1.8.0      2024-09-30 [1] RSPM
#>  gtable           0.3.6      2024-10-25 [1] RSPM
#>  htmltools        0.5.8.1    2024-04-04 [1] RSPM
#>  knitr            1.50       2025-03-16 [1] RSPM
#>  labeling         0.4.3      2023-08-29 [1] RSPM
#>  lattice          0.22-7     2025-04-02 [1] RSPM
#>  lifecycle        1.0.4      2023-11-07 [1] RSPM
#>  lubridate        1.9.4      2024-12-08 [1] RSPM
#>  magrittr         2.0.3      2022-03-30 [1] RSPM
#>  nlme             3.1-168    2025-03-31 [1] RSPM
#>  pillar           1.11.0     2025-07-04 [1] RSPM (R 4.5.0)
#>  pkgconfig        2.0.3      2019-09-22 [1] RSPM
#>  progressr        0.15.1     2024-11-22 [1] RSPM
#>  purrr            1.1.0      2025-07-10 [1] RSPM (R 4.5.0)
#>  R6               2.6.1      2025-02-15 [1] RSPM
#>  RColorBrewer     1.1-3      2022-04-03 [1] RSPM
#>  Rcpp             1.1.0      2025-07-02 [1] RSPM
#>  reprex           2.1.1      2024-07-06 [1] RSPM
#>  rlang            1.1.6      2025-04-11 [1] RSPM
#>  rmarkdown        2.29       2024-11-04 [1] RSPM
#>  rstudioapi       0.17.1     2024-10-22 [1] RSPM
#>  scales           1.4.0      2025-04-24 [1] RSPM (R 4.5.0)
#>  sessioninfo      1.2.3      2025-02-05 [1] RSPM
#>  tibble           3.3.0      2025-06-08 [1] RSPM (R 4.5.0)
#>  tidyr            1.3.1      2024-01-24 [1] RSPM
#>  tidyselect       1.2.1      2024-03-11 [1] RSPM
#>  timechange       0.3.0      2024-01-18 [1] RSPM
#>  tsibble        * 1.1.6      2025-05-30 [1] local
#>  urca             1.3-4      2024-05-27 [1] RSPM
#>  vctrs            0.6.5      2023-12-01 [1] RSPM
#>  withr            3.0.2      2024-10-28 [1] RSPM
#>  xfun             0.53       2025-08-19 [1] RSPM (R 4.5.0)
#>  xml2             1.4.0      2025-08-20 [1] RSPM (R 4.5.0)
#>  yaml             2.3.10     2024-07-26 [1] RSPM
#> 
#>  [1] /home/hyndman/R/x86_64-pc-linux-gnu-library/4.5
#>  [2] /usr/local/lib/R/site-library
#>  [3] /usr/lib/R/site-library
#>  [4] /usr/lib/R/library
#>  * ── Packages attached to the search path.
#> 
#> ──────────────────────────────────────────────────────────────────────────────
3

Hi Rob,

Thanks for the reply.

I have fresh installed R, Rtools, RStudio, and the latest package versions on CRAN that I require.

Black legend keys on the RHS.

> sessioninfo::session_info()
─ Session info ────────────────────────────────────────────────────────────────────────────────────────────────────
 setting  value
 version  R version 4.5.1 (2025-06-13 ucrt)
 os       Windows 11 x64 (build 26100)
 system   x86_64, mingw32
 ui       RStudio
 language (EN)
 collate  English_United Kingdom.utf8
 ctype    English_United Kingdom.utf8
 tz       Europe/London
 date     2025-09-13
 rstudio  2025.09.0+387 Cucumberleaf Sunflower (desktop)
 pandoc   NA
 quarto   ERROR: Unknown command "TMPDIR=C:/Users/achan/AppData/Local/Temp/Rtmp4AwRFk/file22b42e2e2048". Did you mean command "install"? @ C:\\Users\\achan\\AppData\\Local\\Programs\\Quarto\\bin\\quarto.exe

─ Packages ────────────────────────────────────────────────────────────────────────────────────────────────────────
 package        * version date (UTC) lib source
 anytime          0.3.12  2025-07-14 [1] CRAN (R 4.5.1)
 cli              3.6.5   2025-04-23 [1] CRAN (R 4.5.1)
 digest           0.6.37  2024-08-19 [1] CRAN (R 4.5.1)
 distributional   0.5.0   2024-09-17 [1] CRAN (R 4.5.1)
 dplyr            1.1.4   2023-11-17 [1] CRAN (R 4.5.1)
 ellipsis         0.3.2   2021-04-29 [1] CRAN (R 4.5.1)
 fable          * 0.4.1   2024-11-05 [1] CRAN (R 4.5.1)
 fabletools     * 0.5.1   2025-09-01 [1] CRAN (R 4.5.1)
 farver           2.1.2   2024-05-13 [1] CRAN (R 4.5.1)
 feasts           0.4.2   2025-08-27 [1] CRAN (R 4.5.1)
 generics         0.1.4   2025-05-09 [1] CRAN (R 4.5.1)
 ggdist           3.3.3   2025-04-23 [1] CRAN (R 4.5.1)
 ggplot2        * 4.0.0   2025-09-11 [1] CRAN (R 4.5.1)
 glue             1.8.0   2024-09-30 [1] CRAN (R 4.5.1)
 gtable           0.3.6   2024-10-25 [1] CRAN (R 4.5.1)
 labeling         0.4.3   2023-08-29 [1] CRAN (R 4.5.0)
 lattice          0.22-7  2025-04-02 [2] CRAN (R 4.5.1)
 lifecycle        1.0.4   2023-11-07 [1] CRAN (R 4.5.1)
 lubridate        1.9.4   2024-12-08 [1] CRAN (R 4.5.1)
 magrittr         2.0.4   2025-09-12 [1] CRAN (R 4.5.1)
 nlme             3.1-168 2025-03-31 [2] CRAN (R 4.5.1)
 pillar           1.11.0  2025-07-04 [1] CRAN (R 4.5.1)
 pkgconfig        2.0.3   2019-09-22 [1] CRAN (R 4.5.1)
 progressr        0.15.1  2024-11-22 [1] CRAN (R 4.5.1)
 purrr            1.1.0   2025-07-10 [1] CRAN (R 4.5.1)
 R6               2.6.1   2025-02-15 [1] CRAN (R 4.5.1)
 RColorBrewer     1.1-3   2022-04-03 [1] CRAN (R 4.5.0)
 Rcpp             1.1.0   2025-07-02 [1] CRAN (R 4.5.1)
 rlang            1.1.6   2025-04-11 [1] CRAN (R 4.5.1)
 rstudioapi       0.17.1  2024-10-22 [1] CRAN (R 4.5.1)
 S7               0.2.0   2024-11-07 [1] CRAN (R 4.5.1)
 scales           1.4.0   2025-04-24 [1] CRAN (R 4.5.1)
 sessioninfo      1.2.3   2025-02-05 [1] CRAN (R 4.5.1)
 tibble           3.3.0   2025-06-08 [1] CRAN (R 4.5.1)
 tidyr            1.3.1   2024-01-24 [1] CRAN (R 4.5.1)
 tidyselect       1.2.1   2024-03-11 [1] CRAN (R 4.5.1)
 timechange       0.3.0   2024-01-18 [1] CRAN (R 4.5.1)
 tsibble        * 1.1.6   2025-01-30 [1] CRAN (R 4.5.1)
 urca             1.3-4   2024-05-27 [1] CRAN (R 4.5.1)
 vctrs            0.6.5   2023-12-01 [1] CRAN (R 4.5.1)
 withr            3.0.2   2024-10-28 [1] CRAN (R 4.5.1)

 [1] C:/Users/achan/AppData/Local/R/win-library/4.5
 [2] C:/Program Files/R/R-4.5.1/library
 * ── Packages attached to the search path.

───────────────────────────────────────────────────────────────────────────────────────────────────────────────────
Warning message:
In system2("quarto", "-V", stdout = TRUE, env = paste0("TMPDIR=",  :
  running command '"quarto" TMPDIR=C:/Users/achan/AppData/Local/Temp/Rtmp4AwRFk/file22b42e2e2048 -V' had status 1

As an aside do you know how to resolve the quarto and pandoc error(s)?

 pandoc   NA
 quarto   ERROR: Unknown command "TMPDIR=C:/Users/achan/AppData/Local/Temp/Rtmp4AwRFk/file22b42e2e2048". Did you mean command "install"? @ C:\\Users\\achan\\AppData\\Local\\Programs\\Quarto\\bin\\quarto.exe

Warning message:
In system2("quarto", "-V", stdout = TRUE, env = paste0("TMPDIR=",  :
  running command '"quarto" TMPDIR=C:/Users/achan/AppData/Local/Temp/Rtmp4AwRFk/file22b42e2e2048 -V' had status 1

For normal legend keys on the RHS, and to not display quarto errors, but it still says pandoc NA, I have had to install the following versions :

remotes::install_version("sessioninfo", "1.2.2")
pak::pak("ggplot2@3.5.2")

> sessioninfo::session_info()
─ Session info ────────────────────────────────────────────────────────────────────────────────────────────────────
 setting  value
 version  R version 4.5.1 (2025-06-13 ucrt)
 os       Windows 11 x64 (build 26100)
 system   x86_64, mingw32
 ui       RStudio
 language (EN)
 collate  English_United Kingdom.utf8
 ctype    English_United Kingdom.utf8
 tz       Europe/London
 date     2025-09-13
 rstudio  2025.09.0+387 Cucumberleaf Sunflower (desktop)
 pandoc   NA

─ Packages ────────────────────────────────────────────────────────────────────────────────────────────────────────
 package        * version date (UTC) lib source
 anytime          0.3.12  2025-07-14 [1] CRAN (R 4.5.1)
 cli              3.6.5   2025-04-23 [1] CRAN (R 4.5.1)
 digest           0.6.37  2024-08-19 [1] CRAN (R 4.5.1)
 distributional   0.5.0   2024-09-17 [1] CRAN (R 4.5.1)
 dplyr            1.1.4   2023-11-17 [1] CRAN (R 4.5.1)
 ellipsis         0.3.2   2021-04-29 [1] CRAN (R 4.5.1)
 fable          * 0.4.1   2024-11-05 [1] CRAN (R 4.5.1)
 fabletools     * 0.5.1   2025-09-01 [1] CRAN (R 4.5.1)
 farver           2.1.2   2024-05-13 [1] CRAN (R 4.5.1)
 feasts           0.4.2   2025-08-27 [1] CRAN (R 4.5.1)
 generics         0.1.4   2025-05-09 [1] CRAN (R 4.5.1)
 ggdist           3.3.3   2025-04-23 [1] CRAN (R 4.5.1)
 ggplot2        * 3.5.2   2025-04-09 [1] CRAN (R 4.5.1)
 glue             1.8.0   2024-09-30 [1] CRAN (R 4.5.1)
 gtable           0.3.6   2024-10-25 [1] CRAN (R 4.5.1)
 labeling         0.4.3   2023-08-29 [1] CRAN (R 4.5.0)
 lattice          0.22-7  2025-04-02 [2] CRAN (R 4.5.1)
 lifecycle        1.0.4   2023-11-07 [1] CRAN (R 4.5.1)
 lubridate        1.9.4   2024-12-08 [1] CRAN (R 4.5.1)
 magrittr         2.0.4   2025-09-12 [1] CRAN (R 4.5.1)
 nlme             3.1-168 2025-03-31 [2] CRAN (R 4.5.1)
 pillar           1.11.0  2025-07-04 [1] CRAN (R 4.5.1)
 pkgconfig        2.0.3   2019-09-22 [1] CRAN (R 4.5.1)
 progressr        0.15.1  2024-11-22 [1] CRAN (R 4.5.1)
 purrr            1.1.0   2025-07-10 [1] CRAN (R 4.5.1)
 R6               2.6.1   2025-02-15 [1] CRAN (R 4.5.1)
 RColorBrewer     1.1-3   2022-04-03 [1] CRAN (R 4.5.0)
 Rcpp             1.1.0   2025-07-02 [1] CRAN (R 4.5.1)
 rlang            1.1.6   2025-04-11 [1] CRAN (R 4.5.1)
 rstudioapi       0.17.1  2024-10-22 [1] CRAN (R 4.5.1)
 scales           1.4.0   2025-04-24 [1] CRAN (R 4.5.1)
 sessioninfo      1.2.2   2021-12-06 [1] CRAN (R 4.5.1)
 tibble           3.3.0   2025-06-08 [1] CRAN (R 4.5.1)
 tidyr            1.3.1   2024-01-24 [1] CRAN (R 4.5.1)
 tidyselect       1.2.1   2024-03-11 [1] CRAN (R 4.5.1)
 timechange       0.3.0   2024-01-18 [1] CRAN (R 4.5.1)
 tsibble        * 1.1.6   2025-01-30 [1] CRAN (R 4.5.1)
 urca             1.3-4   2024-05-27 [1] CRAN (R 4.5.1)
 vctrs            0.6.5   2023-12-01 [1] CRAN (R 4.5.1)
 withr            3.0.2   2024-10-28 [1] CRAN (R 4.5.1)

 [1] C:/Users/achan/AppData/Local/R/win-library/4.5
 [2] C:/Program Files/R/R-4.5.1/library
4

Hi,

Has the Legend Key been fixed to work with ggplot2: 4.0.0, yet ?

Amarjit

5

Bug introduced in ggplot v4.0.0.
Fixed in both the development versions of ggplot2 and ggdist.

# development version from GitHub:
# install.packages("pak")
pak::pak("tidyverse/ggplot2")

install.packages("devtools")
devtools::install_github("mjskay/ggdist")
6

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