Hi,
I'm worried that I'm doing something stupid, but can't quite spot it.
testBarCharts() :- X axis in integers. Works fine.
testBarChartsDTMonths() :- X axis in datetimes, 1 month between data
points. Works fine
testBarChartsDTHours() :- X axis in datetimes, 1 hour between data
points. Bars seem to extend as far to the right as possible. When
printing the list of patches returned from plotting, the widths are
reported as 0.8, though.
Am I screwing up or is this a matplotlib bug? Using
matplotlib-0.98.5.3.win32-py2.6.exe and
numpy-1.3.0-win32-superpack-python2.6.exe
Many thanks,
Nick
import matplotlib.pyplot as plt
import matplotlib.dates
import datetime
# This works fine
def testBarCharts():
xs = [10,11,12,13]
ys = [100,300,200,600]
fig = plt.figure(figsize=(20,12)) # dims in inches
ax1 = fig.add_subplot(111)
ax1.set_ylabel("foo")
rects = ax1.bar(xs,ys,color=(1,0,0))
# debugging
print xs
print ys
for r in rects:
print r.get_xy(),r.get_width(),"x",r.get_height()
fig.savefig("foo.png")
plt.close(fig)
# FIXME: This is all wonky
def testBarChartsDTHours():
xs = [ \
datetime.datetime(2009,6,29,10),
datetime.datetime(2009,6,29,11),
datetime.datetime(2009,6,29,12),
datetime.datetime(2009,6,29,13) ]
ys = [100,300,200,600]
fig = plt.figure(figsize=(20,12)) # dims in inches
ax1 = fig.add_subplot(111)
ax1.set_ylabel("foo")
ax1.xaxis_date()
min_x = min(xs)
max_x = max(xs)+datetime.timedelta(0,2*60*60)
rects = ax1.bar(xs,ys,color=(1,0,0))
# XXX note that all the rectangle dimensions look sane
print xs
print ys
for r in rects:
print r.get_xy(),r.get_width(),"x",r.get_height()
ax1.set_xbound(min_x,max_x)
fig.savefig("foo1.png")
plt.close(fig)
# Works
def testBarChartsDTMonths():
xs = [ \
datetime.datetime(2009,6,1),
datetime.datetime(2009,7,1),
datetime.datetime(2009,8,1),
datetime.datetime(2009,9,1) ]
ys = [100,300,200,600]
fig = plt.figure(figsize=(20,12)) # dims in inches
ax1 = fig.add_subplot(111)
ax1.set_ylabel("foo")
ax1.xaxis_date()
min_x = min(xs)
max_x = max(xs)+datetime.timedelta(1)
rects = ax1.bar(xs,ys,color=(1,0,0))
# debugging
print xs
print ys
for r in rects:
print r.get_xy(),r.get_width(),"x",r.get_height()
ax1.set_xbound(min_x,max_x)
fig.savefig("foo2.png")
plt.close(fig)
if __name__=='__main__':
testBarCharts()
testBarChartsDTMonths()
testBarChartsDTHours()
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