from ggplot import *
%matplotlib inline
ggplot(mtcars, aes(x='wt', y='mpg')) + geom_point() + geom_hline(y=25)
ggplot(mtcars, aes(x='wt', y='mpg')) + \
geom_point() + \
geom_hline(y=[10, 35])
ggplot(mtcars, aes(x='wt', y='mpg')) + \
geom_point() + \
geom_hline(y=[10, 35], color='BurlyWood')
ggplot(mtcars, aes(x='wt', y='mpg')) + \
geom_point() + \
geom_hline(y=range(10, 40, 5), color='seagreen')
ggplot(diamonds, aes(x='price')) + \
geom_histogram() + \
geom_hline(y=10000, color='salmon') + \
facet_wrap('cut')
ggplot(diamonds, aes(x='carat', y='price')) + \
geom_point(alpha=1/100.) + \
geom_hline(y=15000, color='Orchid') + \
geom_vline(x=2, color='Orchid')