[R] help on plot tick marks

Hi there, I have a yearly data from 1990-2030. The tick marks only show every five years. I want to add another tick mark at 2008 since data beyond that are predicted. How can I just add one tick mark to the X axis? Thank you. Best, Jacky ___

[R] R Map using SAS data

Hi there, I'd like to plot some maps. Is it possible for me to use SAS map data in R? Thank you. Best, Junjie _ your life. [[alternative HTML version deleted]] __ R-help@r-p