Change tick mark labels to specific strings in plotly

Question

I have plotly graphics where I'd like to change axis tick mark labels to specific strings. Consider the following example:

library(plotly)
p <- plot_ly(data = iris, x = ~Sepal.Length, y = ~Petal.Length)

Say I want to supress all numeric xaxis tick mark labels and instead only plot the string "min" at x = 4.5 and "max" at x = 8.

How can I achieve this in plotly?

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Sidenote: I know this is possible for base R plots, e.g. here and in ggplot2 by setting scale_x_continuous(breaks = c(4.5, 8), labels= c("4.5" = "min", "8" = "max")).

Is there also a way to achieve this in plotly? ..Unfortunately the plotly docs don't seem to offer a solution..

Answer 1

Thanks to @eipi10 and @Jon Spring I could figure it out:

library(plotly)
plot_ly(data = iris, x = ~Sepal.Length, y = ~Petal.Length) %>% 
  layout(xaxis = list(tickvals = c(4.5, 8), ticktext = c("min", "max")))

This is exactly what I was searching for and produces: