[R] yaxs Causes Boundary Line Colour to Change

[Dario Strbenac]

Why is the bottom boundary plotted in a different colour to the other three sides ?

set.seed(4444)
data <- rpois(10, 2)
plot(density(data), ann = FALSE, yaxs = 'i') # Grey bottom boundary.
plot(density(data), ann = FALSE) # All boundaries are black.

Ideally, there would be black lines on all four sides. The documentation doesn't say the colour will change.

> sessionInfo()
R version 3.1.1 (2014-07-10)
Platform: x86_64-unknown-linux-gnu (64-bit)

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Dario Strbenac
PhD Student
University of Sydney
Camperdown NSW 2050
Australia