ggplotly does not respect the `width` of tiles, fills the "no data" range instead

ggplotly does not respect the width value used for tiles. In the examples, the tiles should have a constant width, but converting the visualisation with ggplotly() results in a different visualisation, in which the areas with no data associated are "filled in" by the bordering tiles. It looks like the tiles expand on both sides equally, just enough to fill the empty space.

Note that what is meant by "no data" here is different to "missing data": the x value has no corresponding row in the dataset.

library(ggplot2)
library(plotly)
# default tile width
(default_width <- ggplot(mapping = aes(x = c(1, 2, 4), y = 1, fill = 1:3)) +
   geom_tile())

Convert to plotly:

ggplotly(default_width)

If one provides a custom width for the tiles, ggplotly() still ignores it:

# custom tile width
(custom_width <- ggplot(mapping = aes(x = c(1, 2, 4), y = 1, fill = 1:3)) +
    geom_tile(width = .5))

Convert to plotly:

ggplotly(custom_width)

This does not happen if doing something similar with geom_col().

Using:

• R 4.1.0
• ggplot2 3.3.3
• plotly 4.9.3

ggplotly() と geom_tile() を使用した R の例で問題を再現し、デフォルト幅の場合とカスタム幅の場合を geom_col() の動作と比較します。ggplotly() によるタイル幅の変換を追跡し、行のない x 値のギャップが空のままになっていること、および geom_tile(width = .5) が尊重されていることを確認します。