enter_fade()/exit_fade() does not seem to work.

[jtlandis]

library(ggplot2)
library(gganimate)

I think there may be an issue arising from vctrs but I am unsure of the extent. Here is a reprex in which we are trying to replicate an example from the trasition-layers documentation

Some other testing (not shown here), I have confirmed that enter_grow and exit_shrink work which is an interesting note.

anim1 <- ggplot(mtcars, aes(mpg, disp)) +
  geom_point() +
  geom_smooth(colour = 'grey', se = FALSE) +
  geom_smooth(aes(colour = factor(gear))) +
  transition_layers(layer_length = 1, transition_length = 2,
                    from_blank = FALSE) +
  enter_fade() + enter_grow()
anim1
#> `geom_smooth()` using method = 'loess' and formula = 'y ~ x'
#> `geom_smooth()` using method = 'loess' and formula = 'y ~ x'
#> Warning in simpleLoess(y, x, w, span, degree = degree, parametric = parametric,
#> : span too small.  fewer data values than degrees of freedom.
#> Warning in simpleLoess(y, x, w, span, degree = degree, parametric = parametric,
#> : pseudoinverse used at 14.923
#> Warning in simpleLoess(y, x, w, span, degree = degree, parametric = parametric,
#> : neighborhood radius 4.777
#> Warning in simpleLoess(y, x, w, span, degree = degree, parametric = parametric,
#> : reciprocal condition number 0
#> Warning in simpleLoess(y, x, w, span, degree = degree, parametric = parametric,
#> : There are other near singularities as well. 116.14
#> Warning in simpleLoess(y, x, w, span, degree = degree, parametric = parametric,
#> : Chernobyl! trL>n 5

#> Warning in simpleLoess(y, x, w, span, degree = degree, parametric = parametric,
#> : Chernobyl! trL>n 5
#> Warning in sqrt(sum.squares/one.delta): NaNs produced
#> Warning in predLoess(object$y, object$x, newx = if (is.null(newdata)) object$x
#> else if (is.data.frame(newdata))
#> as.matrix(model.frame(delete.response(terms(object)), : span too small.  fewer
#> data values than degrees of freedom.
#> Warning in predLoess(object$y, object$x, newx = if (is.null(newdata)) object$x
#> else if (is.data.frame(newdata))
#> as.matrix(model.frame(delete.response(terms(object)), : pseudoinverse used at
#> 14.923
#> Warning in predLoess(object$y, object$x, newx = if (is.null(newdata)) object$x
#> else if (is.data.frame(newdata))
#> as.matrix(model.frame(delete.response(terms(object)), : neighborhood radius
#> 4.777
#> Warning in predLoess(object$y, object$x, newx = if (is.null(newdata)) object$x
#> else if (is.data.frame(newdata))
#> as.matrix(model.frame(delete.response(terms(object)), : reciprocal condition
#> number 0
#> Warning in predLoess(object$y, object$x, newx = if (is.null(newdata)) object$x
#> else if (is.data.frame(newdata))
#> as.matrix(model.frame(delete.response(terms(object)), : There are other near
#> singularities as well. 116.14
#> Warning in stats::qt(level/2 + 0.5, pred$df): NaNs produced
#> Error in `vec_rbind()`:
#> ! Can't combine `..1$fill` <logical> and `..2$fill` <character>.
#> Backtrace:
#>      ▆
#>   1. ├─base::tryCatch(...)
#>   2. │ └─base (local) tryCatchList(expr, classes, parentenv, handlers)
#>   3. │   ├─base (local) tryCatchOne(...)
#>   4. │   │ └─base (local) doTryCatch(return(expr), name, parentenv, handler)
#>   5. │   └─base (local) tryCatchList(expr, names[-nh], parentenv, handlers[-nh])
#>   6. │     └─base (local) tryCatchOne(expr, names, parentenv, handlers[[1L]])
#>   7. │       └─base (local) doTryCatch(return(expr), name, parentenv, handler)
#>   8. ├─base::withCallingHandlers(...)
#>   9. ├─base::saveRDS(...)
#>  10. ├─base::do.call(...)
#>  11. ├─base (local) `<fn>`(...)
#>  12. ├─global `<fn>`(input = base::quote("neat-koala_reprex.R"))
#>  13. │ └─rmarkdown::render(input, quiet = TRUE, envir = globalenv(), encoding = "UTF-8")
#>  14. │   └─knitr::knit(knit_input, knit_output, envir = envir, quiet = quiet)
#>  15. │     └─knitr:::process_file(text, output)
#>  16. │       ├─base::withCallingHandlers(...)
#>  17. │       ├─base::withCallingHandlers(...)
#>  18. │       ├─knitr:::process_group(group)
#>  19. │       └─knitr:::process_group.block(group)
#>  20. │         └─knitr:::call_block(x)
#>  21. │           └─knitr:::block_exec(params)
#>  22. │             └─knitr:::eng_r(options)
#>  23. │               ├─knitr:::in_input_dir(...)
#>  24. │               │ └─knitr:::in_dir(input_dir(), expr)
#>  25. │               └─knitr (local) evaluate(...)
#>  26. │                 └─evaluate::evaluate(...)
#>  27. │                   └─evaluate:::evaluate_call(...)
#>  28. │                     ├─evaluate (local) handle(...)
#>  29. │                     │ └─base::try(f, silent = TRUE)
#>  30. │                     │   └─base::tryCatch(...)
#>  31. │                     │     └─base (local) tryCatchList(expr, classes, parentenv, handlers)
#>  32. │                     │       └─base (local) tryCatchOne(expr, names, parentenv, handlers[[1L]])
#>  33. │                     │         └─base (local) doTryCatch(return(expr), name, parentenv, handler)
#>  34. │                     ├─base::withCallingHandlers(...)
#>  35. │                     ├─base::withVisible(value_fun(ev$value, ev$visible))
#>  36. │                     └─knitr (local) value_fun(ev$value, ev$visible)
#>  37. │                       └─knitr (local) fun(x, options = options)
#>  38. │                         ├─base::withVisible(knit_print(x, ...))
#>  39. │                         ├─knitr::knit_print(x, ...)
#>  40. │                         └─gganimate::knit_print.gganim(x, ...)
#>  41. │                           ├─base::do.call(animate, c(list(plot = x), knitr_options))
#>  42. │                           ├─gganimate (local) `<fn>`(...)
#>  43. │                           └─gganimate:::animate.gganim(...)
#>  44. │                             └─gganimate:::prerender(plot, nframes_total)
#>  45. │                               ├─ggplot2::ggplot_build(plot)
#>  46. │                               └─gganimate:::ggplot_build.gganim(plot)
#>  47. │                                 └─scene$after_defaults(data)
#>  48. │                                   └─gganimate (local) after_defaults(..., self = self)
#>  49. │                                     └─self$transition$expand_data(...)
#>  50. │                                       └─gganimate (local) expand_data(..., self = self)
#>  51. │                                         └─base::Map(...)
#>  52. │                                           └─base::mapply(FUN = f, ..., SIMPLIFY = FALSE)
#>  53. │                                             └─gganimate (local) `<fn>`(...)
#>  54. │                                               └─self$expand_layer(...)
#>  55. │                                                 └─gganimate (local) expand_layer(..., self = self)
#>  56. │                                                   └─tweenr::tween_state(...)
#>  57. │                                                     └─tweenr::.complete_states(from, to, id, enter, exit, .max_id(.data))
#>  58. │                                                       └─vctrs::vec_rbind(from, enters)
#>  59. └─vctrs (local) `<fn>`()
#>  60.   └─vctrs::vec_default_ptype2(...)
#>  61.     ├─base::withRestarts(...)
#>  62.     │ └─base (local) withOneRestart(expr, restarts[[1L]])
#>  63.     │   └─base (local) doWithOneRestart(return(expr), restart)
#>  64.     └─vctrs::stop_incompatible_type(...)
#>  65.       └─vctrs:::stop_incompatible(...)
#>  66.         └─vctrs:::stop_vctrs(...)
#>  67.           └─rlang::abort(message, class = c(class, "vctrs_error"), ..., call = call)

^{Created on 2023-10-18 with reprex v2.0.2}

Session info

sessioninfo::session_info()
#> ─ Session info ───────────────────────────────────────────────────────────────
#>  setting  value
#>  version  R version 4.3.0 (2023-04-21)
#>  os       macOS Big Sur 11.7.4
#>  system   x86_64, darwin20
#>  ui       X11
#>  language (EN)
#>  collate  en_US.UTF-8
#>  ctype    en_US.UTF-8
#>  tz       America/New_York
#>  date     2023-10-18
#>  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)
#>  crayon        1.5.2    2022-09-29 [1] CRAN (R 4.3.0)
#>  digest        0.6.33   2023-07-07 [1] CRAN (R 4.3.0)
#>  dplyr         1.1.3    2023-09-03 [1] CRAN (R 4.3.0)
#>  evaluate      0.22     2023-09-29 [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)
#>  gganimate   * 1.0.8    2022-09-08 [1] CRAN (R 4.3.0)
#>  ggplot2     * 3.4.3    2023-08-14 [1] CRAN (R 4.3.0)
#>  gifski        1.12.0-2 2023-08-12 [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 4.3.0)
#>  hms           1.1.3    2023-03-21 [1] CRAN (R 4.3.0)
#>  htmltools     0.5.6    2023-08-10 [1] CRAN (R 4.3.0)
#>  knitr         1.44     2023-09-11 [1] CRAN (R 4.3.0)
#>  labeling      0.4.3    2023-08-29 [1] CRAN (R 4.3.0)
#>  lattice       0.21-9   2023-10-01 [1] CRAN (R 4.3.0)
#>  lifecycle     1.0.3    2022-10-07 [1] CRAN (R 4.3.0)
#>  magrittr      2.0.3    2022-03-30 [1] CRAN (R 4.3.0)
#>  Matrix        1.6-1.1  2023-09-18 [1] CRAN (R 4.3.0)
#>  mgcv          1.9-0    2023-07-11 [1] CRAN (R 4.3.0)
#>  munsell       0.5.0    2018-06-12 [1] CRAN (R 4.3.0)
#>  nlme          3.1-163  2023-08-09 [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)
#>  prettyunits   1.2.0    2023-09-24 [1] CRAN (R 4.3.0)
#>  progress      1.2.2    2019-05-16 [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     2.25     2023-09-18 [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)
#>  sessioninfo   1.2.2    2021-12-06 [1] CRAN (R 4.3.0)
#>  stringi       1.7.12   2023-01-11 [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)
#>  tweenr        2.0.2    2022-09-06 [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         2.5.1    2023-09-26 [1] CRAN (R 4.3.0)
#>  xfun          0.40     2023-08-09 [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-x86_64/Resources/library
#> 
#> ──────────────────────────────────────────────────────────────────────────────

[jtlandis]

After more investigating it seems that it may be linked to color/fill aesthetics, so enter/exit_recolor() are affected as well. My guess is when you use a geom that does not natively use fill like geom_point(), you get this error.

[jtlandis]

Update

Doing something like to following will fix the issue:

ggplot(mtcars, aes(mpg, disp)) +
    geom_point(fill = "black") +
    geom_smooth(colour = 'grey', se = FALSE) +
    geom_smooth(aes(colour = factor(gear))) +
    transition_layers(layer_length = 1, transition_length = 2,
                      from_blank = FALSE) +
    enter_fade() + enter_grow()