Changes for 0.63

.. code-block:: text

Dates are now represented internally as float days since 0001-01-01, UTC.

All date tickers and formatters are now in matplotlib.dates, rather than matplotlib.tickers

converters have been abolished from all functions and classes. num2date and date2num are now the converter functions for all date plots

Most of the date tick locators have a different meaning in their constructors. In the prior implementation, the first argument was a base and multiples of the base were ticked. e.g.,

HourLocator(5)  # old: tick every 5 minutes

In the new implementation, the explicit points you want to tick are provided as a number or sequence

 HourLocator(range(0,5,61))  # new: tick every 5 minutes

This gives much greater flexibility. I have tried to make the default constructors (no args) behave similarly, where possible.

Note that YearLocator still works under the base/multiple scheme. The difference between the YearLocator and the other locators is that years are not recurrent.

Financial functions:

matplotlib.finance.quotes_historical_yahoo(ticker, date1, date2)

 date1, date2 are now datetime instances.  Return value is a list
 of quotes where the quote time is a float - days since gregorian
 start, as returned by date2num

 See examples/finance_demo.py for example usage of new API