twoord plot in R

Question

Using the plotrix package to make a twoord plot. My attempts look like this

The problem I have is that it automatically does not plot the full left axis? Why is this?

It is the same in this example here How can I plot with 2 different y-axes?

How is it possible to get the full left y?

Answer 1

As you didn't provide your data or your code, I offer this as an example:

library(plotrix)

twoord.plot(2:10, seq(3, 7, by=0.5) + rnorm(9),
            1:15, rev(60:74) + rnorm(15), 
            type= c("l", "l"), xaxt = 'n', yaxt = 'n')