geom_col does not display all bars at small widths

[davidhodge931]

If this is impossible to fix, I wonder if there should be a warning at very narrow widths?

Seems dangerous..

library(tidyverse)
#> Warning: package 'purrr' was built under R version 4.4.3

tidyquant::tq_get("SGMO", get = "stock.prices") |> 
  as_tibble() |> 
  ggplot() +
  geom_point(aes(x = date, y = volume))
#> Registered S3 method overwritten by 'quantmod':
#>   method            from
#>   as.zoo.data.frame zoo

tidyquant::tq_get("SGMO", get = "stock.prices") |> 
  as_tibble() |> 
  ggplot() +
  geom_col(aes(x = date, y = volume), position = "dodge")

^{Created on 2025-03-23 with reprex v2.1.1}

[teunbrand]

This is a limitation in raster graphics, not specificallly for ggplot2. You may get better results, with a different devices that is beter at anti-aliasing (like ragg), but that too can only stretch the solution so far. You can set e.g. colour = "black" to inflate the thickness of the bars or use vector graphics device to not have the bars disappear. In any case, at the time the bars have to be instantiated by ggplot2, it is not known what the device size is and if the bars will reach sub-pixel widts, so there is no meaningful way that ggplot2 can throw a warning about this.

[davidhodge931]

Makes sense, thanks!