Format axis labels from scale_y_time() in ggplot2

Question

I'm trying to figure out how to manipulate the axis labels that are produced when using scale_y_time() in ggplot2. For example, I would like to change the y-axis label produced by the code below to be just "minutes and seconds" ("%M:%S")

Here is a simple example of the kind of plot I am making, with data that represents a "starting point" (start) and "ending point" (end) and time tag in seconds that goes with each starting point (time).

library(tidyverse)

start <- seq(1, 105, 5)
end <- seq(3, 103, 5)
time = seq(0, 360, 18)

dat <- data.frame(start, end, time)

ggplot(dat) + 
  geom_segment(aes(x = start, y = time, xend = end, yend = time)) +
  scale_y_time()

Jon Spring · Accepted Answer · 2021-10-20 19:54:56Z

2

+ scale_y_time(labels = function(t) strftime(t, "%M:%S")) should yield:

answered Oct 20, 2021 at 19:54

Jon Spring

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