[Matplotlib-users] Re: histogram of evetns, unix time

[<rom...@ya...>]

Jiri Polcar wrote:
> 
> But I want to display labels on x-axis's tics as a date human readable
> date (for example "Dec 13").
> 

I adapted this from finance_demo.py. You will probably have to adjust it 
to better suit your needs. It assumes the ut array is sorted.


from pylab import *
from matplotlib.dates import  DateFormatter, WeekdayLocator, HourLocator, \
      DayLocator, MONDAY, timezone
import time,datetime

ut = [1127164705, 1127199439, 1127199439, 1127199494, 1127199640, 
1127199651]

date1 = apply(datetime.date,time.localtime(ut[0])[0:3])
date2 = apply(datetime.date,time.localtime(ut[-1])[0:3])

mondays = WeekdayLocator(MONDAY)
weekFormatter = DateFormatter('%b %d')  # Eg, Jan 12
alldays    = DayLocator()

ax = subplot(111)
ax.xaxis.set_major_locator(mondays)
ax.xaxis.set_minor_locator(alldays)
ax.xaxis.set_major_formatter(weekFormatter)

dates = []
for u in ut:
	year,month,day = time.localtime(u)[0:3]
	dates.append(datetime.date(year,month,day).toordinal())

n, bins, patches = hist( dates, 50 )
setp(patches, 'facecolor', 'g', 'alpha', 0.75)
#axis([ 0.9999*amin(ut), 1.0001*amax(ut), 0, 1.1*amax(n) ])
show()