On Tue, Jun 3, 2008 at 3:41 PM, Ted Drain <[EMAIL PROTECTED]> wrote:
> At some point in the future, I'll put a little test case together to show
> how the problems w/ not supporting a zero date show up in embedded plots.
Actually, when you pass in python datetime objects to mpl, we use the
units converter infrastructure to convert these under the hood using
date2num. This is fairly easy to override in the units registry. If
you provide a registry to do conversions, locators and formatters for
julian dates, I can easily include it with an rc setting to make a
configurable default.
The date interface is setup in the matplotlib.dates module with the
following code -- all you have to do is provide a different converter
and we can provide a hook
class DateConverter(units.ConversionInterface):
def axisinfo(unit):
'return the unit AxisInfo'
if unit=='date':
majloc = AutoDateLocator()
majfmt = AutoDateFormatter(majloc)
return units.AxisInfo(
majloc = majloc,
majfmt = majfmt,
label='',
)
else: return None
axisinfo = staticmethod(axisinfo)
def convert(value, unit):
if units.ConversionInterface.is_numlike(value): return value
return date2num(value)
convert = staticmethod(convert)
def default_units(x):
'return the default unit for x or None'
return 'date'
default_units = staticmethod(default_units)
units.registry[datetime.date] = DateConverter()
units.registry[datetime.datetime] = DateConverter()
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