Two lines of X axis labels in ggplot

Question

I want to make two lines of X axis labels in ggplot.

enter image description here

In this plot, I want to add one more line of label below each specified year. Something like

1990 1995 2000 2005 2010 cold warm warm cold warm

This is my code for making this plot

ggplot(subset(dat, countryid %in% c("1")),  aes(date, 
nonpartisan))+geom_line(aes(color=countryid), color="dodgerblue1", 
size=1.4)+geom_line(aes(date, reshuffle), color="gray")+ theme_bw()

Is there any way to make one more line of label by creating a column specifically for the labels?

Thanks!

possible duplicate of [Multi-row x-axis labels in ggplot line chart](http://stackoverflow.com/questions/20571306/multi-row-x-axis-labels-in-ggplot-line-chart) — Henrik, Dec 11 '14 at 08:38

score 14 · Accepted Answer · answered Dec 11 '14 at 08:42

14

You can just add custom labels via scale_x_continuous (or scale_x_date, if it is actually in Date format).

ggplot(subset(dat, countryid %in% c("1")),  aes(date, nonpartisan)) +
  geom_line(aes(color=countryid), color="dodgerblue1", size=1.4) +
  geom_line(aes(date, reshuffle), color="gray") + 
  theme_bw() +
  scale_x_continuous(name = 'date', 
                     breaks = c('1990', '1995', '2000', '2005', '2010'), 
                     labels = c('1990\ncold', '1995\nwarm', '2000\nwarm', '2005\ncold', '2010\nwarm'))

answered Dec 11 '14 at 08:42

shadow

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Thanks! This works perfectly. I only modified your code from `scale_x_continuous` to `scale_x_date`. Minor modifications for the breaks as well. – user3077008 Dec 11 '14 at 09:03
@user3077008 could you post your resulting code? thanks – Sergio Mar 06 '16 at 05:33

Two lines of X axis labels in ggplot

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