plotly / plotly/plotly.R

Bubble sizes out of order, when using a formula for the `color`/`name` attributes

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Descrizione

Hi folks, I'm seeing a strange effect on scatter plot marker sizes, when using a formula for the color (and name) attributes.

(edited to add more test cases)

library(plotly)
#> Loading required package: ggplot2
#> 
#> Attaching package: 'plotly'
#> The following object is masked from 'package:ggplot2':
#> 
#>     last_plot
#> The following object is masked from 'package:stats':
#> 
#>     filter
#> The following object is masked from 'package:graphics':
#> 
#>     layout

df <- data.frame(x = c(1, 2, 3, 4, 5),
                 y = c(1, 2, 3, 4, 5),
                 z = c(1, 2, 3, 4, 5))

# Expected output: marker sizes in order
plot_ly(df,
        x = ~x,
        y = ~y,
        type = "scatter",
        mode = "markers",
        marker = list(size = ~z,
                      sizeref = 0.1),
        color = ~z < 2,
        colors = c(I("green"), I("red")),
        text = ~paste0("z: ", z))



# df has correct data
df
#>   x y z
#> 1 1 1 1
#> 2 2 2 2
#> 3 3 3 3
#> 4 4 4 4
#> 5 5 5 5

# Buggy output: changing "color" formula threshold puts marker sizes out of order
plot_ly(df,
        x = ~x,
        y = ~y,
        type = "scatter",
        mode = "markers",
        marker = list(size = ~z,
                      sizeref = 0.1),
        color = ~z < 3,
        colors = c(I("green"), I("red")),
        text = ~paste0("z: ", z))



# df still has correct data
df
#>   x y z
#> 1 1 1 1
#> 2 2 2 2
#> 3 3 3 3
#> 4 4 4 4
#> 5 5 5 5

# Buggy output: static vector also puts marker sizes out of order
plot_ly(df,
        x = ~x,
        y = ~y,
        type = "scatter",
        mode = "markers",
        marker = list(size = ~z,
                      sizeref = 0.1),
        color = c(TRUE, TRUE, FALSE, FALSE, FALSE),
        colors = c(I("green"), I("red")),
        text = ~paste0("z: ", z))



# Buggy output: use ifelse with (TRUE, FALSE)
plot_ly(df,
        x = ~x,
        y = ~y,
        type = "scatter",
        mode = "markers",
        marker = list(size = ~z,
                      sizeref = 0.1),
        color = ~ifelse(z < 3, TRUE, FALSE),
        colors = c(I("green"), I("red")),
        text = ~paste0("z: ", z))



# Possible workaround: use ifelse with (1, 0)
plot_ly(df,
        x = ~x,
        y = ~y,
        type = "scatter",
        mode = "markers",
        marker = list(size = ~z,
                      sizeref = 0.1),
        color = ~ifelse(z < 3, 1, 0),
        colors = c(I("green"), I("red")),
        text = ~paste0("z: ", z))



# Buggy again when adding "name" field with formula
plot_ly(df,
        x = ~x,
        y = ~y,
        type = "scatter",
        mode = "markers",
        marker = list(size = ~z,
                      sizeref = 0.1),
        color = ~ifelse(z < 3, 1, 0),
        colors = c(I("green"), I("red")),
        name = ~ifelse(z < 3, "Red", "Green"),
        text = ~paste0("z: ", z))

Created on 2024-04-06 with reprex v2.1.0

Session info 
sessioninfo::session_info()
#> ─ Session info ───────────────────────────────────────────────────────────────
#>  setting  value
#>  version  R version 4.3.3 (2024-02-29)
#>  os       Ubuntu 22.04.4 LTS
#>  system   x86_64, linux-gnu
#>  ui       X11
#>  language (EN)
#>  collate  en_US.UTF-8
#>  ctype    en_US.UTF-8
#>  tz       America/Indiana/Vevay
#>  date     2024-04-06
#>  pandoc   3.1.1 @ /usr/lib/rstudio/resources/app/bin/quarto/bin/tools/ (via rmarkdown)
#> 
#> ─ Packages ───────────────────────────────────────────────────────────────────
#>  package     * version date (UTC) lib source
#>  callr         3.7.5   2024-02-19 [1] CRAN (R 4.3.2)
#>  cli           3.6.2   2023-12-11 [1] CRAN (R 4.3.2)
#>  colorspace    2.1-0   2023-01-23 [1] CRAN (R 4.3.0)
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#> ──────────────────────────────────────────────────────────────────────────────

Bad color formulas are:

  • z < 3
  • z < 4
  • z < 5

The results from z < 2 may also be incorrect ... they're just indiscernible given my example.

This behavior causes significant skewing/confusion for bubble plots of any size.

Thanks for reading!

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Direzione di ricerca

Non vengono indicati file sorgente né test. Inizia eseguendo gli esempi plot_ly forniti con valori di colore formula e statici, quindi traccia come vengono assemblati i dati di marker size, color e name. Il lavoro è completato quando le dimensioni delle bolle rimangono allineate alle righe originali per le soglie e i casi di name segnalati, con copertura di regressione per gli esempi.

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
35/100

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