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#!/usr/bin/env python
Show how to use an rrule instance to make a custom date ticker - here
we put a tick mark on every 5th easter

See https://moin.conectiva.com.br/DateUtil for help with rrules
from pylab import *
from matplotlib.dates import YEARLY, DateFormatter, rrulewrapper, RRuleLocator, drange
import datetime

# tick every 5th easter
rule = rrulewrapper(YEARLY, byeaster=1, interval=5)
loc = RRuleLocator(rule)
formatter = DateFormatter('%m/%d/%y')
date1 = datetime.date( 1952, 1, 1 )
date2 = datetime.date( 2004, 4, 12 )
delta = datetime.timedelta(days=100)

dates = drange(date1, date2, delta)
s = rand(len(dates)) # make up some random y values

ax = subplot(111)
plot_date(dates, s)
labels = ax.get_xticklabels()
setp(labels, rotation=30, fontsize=10)


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