Reproducible example:
library(forecast)
library(ggplot2)
gas <- forecast::gas
gas <- window(gas, start=1990)
ggseasonplot(gas, year.labels = TRUE)
The lines are too thin to distinguish colours properly, so I would like to control the linewidth. I have tried "lwd", "linewidth" and "size" but the plot does not react to any of these. If someone could help please, it would be much appreciated. Thank you.
For the gg
version, you can modify the linewidths by adding another geom:
ggseasonplot(gas, year.labels = TRUE) +
geom_line(linewidth=1)