sec_axis() triggers train_continuous() error with unused argument call = call on ggplot2 3.5.2

[joaopedrosusselbertogna]

Hi,

I’m encountering an unexpected error when trying to use sec_axis() in a simple plot. I’ve checked the documentation and some previous issues, and I haven’t found anything that would suggest a mistake in the code below. That’s why I’m wondering if it might be a bug.

library(ggplot2)

df <- data.frame(x = 1:10, y = (1:10) * 2)

ggplot(df, aes(x = x, y = y)) +
geom_line() +
scale_y_continuous(
name = "Primary Axis",
sec.axis = sec_axis(~ . / 2, name = "Secondary Axis")
)

Error message:

Error in train_continuous(x, self$range, call = call) :
argumento não utilizado (call = call)

What I’ve tried:
I updated ggplot2 using install.packages("ggplot2")

Restarted the R session

Removed and reinstalled the package

Verified I’m using version 3.5.2

Still, the error persists. I understand this could be due to something specific in my R setup, but since the example is minimal and uses only base R + ggplot2, I thought it was worth reporting in case others are affected.

Thanks in advance for your time and for all the work you do on the package!

[teunbrand]

Thanks for the report! I cannot reproduce this with neither the CRAN version or the development version of ggplot2. Is your scales package at version 1.4.0?

[joaopedrosusselbertogna]

You were absolutely right — my scales package was out of date. After updating it to version 1.4.0, the issue was resolved and the plot renders correctly now.

I really appreciate the help!

[teunbrand]

Thanks for checking in! I'll consider this issue solved then :)