plotly / plotly/plotly.R

`ggplotly` produces error when using `geom_area` or `geom_line(position = "stack")` across frames

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Descrizione

When using ggplotly to convert from a ggplot object, R produces an error when:

  • using geom_area() (default position = "stack") or geom_line(position = "stack")
  • splitting lines/areas by multiple groups (for stacking)
  • animating across frames

These both produce the error "Error in -data$group: invalid argument to unary operator". Reprex below.

library(ggplot2)
library(dplyr)
library(plotly)


# Working plot with `position = "identity"`
plt1 <- {
  tibble(
    a = rep(rep(1:5, each = 2), 2),
    b = sample(1:10, 20, replace = TRUE),
    group = rep(c("a", "b"), 10),
    frame = rep(1:2, each = 10)
  ) %>%
    ggplot(aes(a, b, colour = group, frame = frame)) +
    geom_line()
} %>%
  ggplotly

# Two plots not working, both `position = "stack"`
plt2 <- {
  tibble(
    a = rep(rep(1:5, each = 2), 2),
    b = sample(1:10, 20, replace = TRUE),
    group = rep(c("a", "b"), 10),
    frame = rep(1:2, each = 10)
  ) %>%
    ggplot(aes(a, b, colour = group, frame = frame)) +
    geom_line(position = "stack")
} %>%
  ggplotly
#> Error in -data$group: invalid argument to unary operator


plt3 <- {
  tibble(
    a = rep(rep(1:5, each = 2), 2),
    b = sample(1:10, 20, replace = TRUE),
    group = rep(c("a", "b"), 10),
    frame = rep(1:2, each = 10)
  ) %>%
    ggplot(aes(a, b, fill = group, frame = frame)) +
    geom_area()
} %>%
  ggplotly
#> Error in -data$group: invalid argument to unary operator

Created on 2021-12-21 by the reprex package (v2.0.1)

Session info 
sessioninfo::session_info()
#> - Session info  --------------------------------------------------------------
#>  hash: oncoming police car, eye in speech bubble, toilet
#> 
#>  setting  value
#>  version  R version 4.1.1 (2021-08-10)
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#>  system   x86_64, mingw32
#>  ui       RTerm
#>  language (EN)
#>  collate  English_United Kingdom.1252
#>  ctype    English_United Kingdom.1252
#>  tz       Europe/London
#>  date     2021-12-21
#>  pandoc   2.14.0.3 @ C:/Program Files/RStudio/bin/pandoc/ (via rmarkdown)
#> 
#> - Packages -------------------------------------------------------------------
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#> ------------------------------------------------------------------------------

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Direzione di ricerca

Inizia eseguendo il reprex fornito con ggplotly, confrontando il caso funzionante position = "identity" con geom_line(position = "stack") e geom_area tra i vari frame. Traccia il percorso di conversione di ggplotly per i dati animati raggruppati e aggiungi una copertura di regressione che dimostri che entrambi i casi di stacking non producono più l’errore segnalato.

Scritto dal modello di indicizzazione a partire dal testo della issue.

Valutazione

Stack tecnologico
r
Ambito
data-visualization
Tipo di issue
Bug
Difficoltà
4/5
Tempo stimato
3-5 giorni
Stato di attività
Ferma
Chiarezza
Abbastanza chiara
Idoneità per principianti
42/100

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