ggplotly rewrites axis tick labels (specified in scale_x_continuous) incorrectly

[krystian8207]

Hi! Thank you for the great package!

Last time when trying to convert ggplot object into plotly I met the following bug.

When specifying labels in scale_x_continuous for original ggplot object and then converting it to plotly with ggplotly the tick labels are moved one tick to the right.

Original ggplot:

library(ggplot2)
library(plotly)

p <- ggplot(data = mtcars, aes(x = qsec, y = disp)) + 
  geom_point() + 
  scale_x_continuous(
    breaks = pretty(range(mtcars$qsec), n = 10),
    labels = pretty(range(mtcars$qsec), n = 10)
  )
p

Plotly version:

ggplotly(p)

SessionInfo:

R version 3.6.1 (2019-07-05)
Platform: x86_64-pc-linux-gnu (64-bit)
Running under: Debian GNU/Linux 9 (stretch)

Matrix products: default
BLAS/LAPACK: /usr/lib/libopenblasp-r0.2.19.so

locale:
 [1] LC_CTYPE=en_US.UTF-8       LC_NUMERIC=C               LC_TIME=en_US.UTF-8        LC_COLLATE=en_US.UTF-8    
 [5] LC_MONETARY=en_US.UTF-8    LC_MESSAGES=C              LC_PAPER=en_US.UTF-8       LC_NAME=C                 
 [9] LC_ADDRESS=C               LC_TELEPHONE=C             LC_MEASUREMENT=en_US.UTF-8 LC_IDENTIFICATION=C       

attached base packages:
[1] stats     graphics  grDevices utils     datasets  methods   base     

other attached packages:
[1] plotly_4.9.2  ggplot2_3.3.0

[ellisp]

I think this is new to ggplot2 v 3.3.0. See https://stackoverflow.com/questions/60807523/how-to-show-correct-horizontal-axis-in-ggplotly-when-it-is-a-date/60808558#60808558 for another example, where dates are labelled wrong by several years. That problem went away for me when I reerted to ggplot2 v 3.2.1. So something changed in ggplot2 that is now being mistaken by plotly.