Re: [Matplotlib-users] Aligning xticks and labels with WeekdayLocator

[Paul H. <pmh...@gm...>]

On Mon, Mar 18, 2013 at 8:34 PM, Mark Lawrence <bre...@ya...>wrote:

> Matplotlib 1.2.0, Windows Vista, Python 3.3.0.  I want the first major
> xtick label aligned with the first date that's plotted.  This never
> happens with the value of day below set in the range zero to six.  The
> first major tick label actually occurs as follows.
>
> Day     Label date
> 0       25/03/2013
> 1       02/04/2013
> 2       10/04/2013
> 3       21/03/2013
> 4       29/03/2013
> 5       06/04/2013
> 6       17/03/2013
>
> What am I doing wrong?
>
> If day is set to seven then no xticks are displayed but labels for
> 14/03/2013 and 13/03/2014 are displayed.  I expected a ValueError or
> similar using this number.  Could you explain this behaviour please?
>
> import matplotlib.pyplot as plt
> from matplotlib.ticker import FormatStrFormatter, MultipleLocator
> from matplotlib.dates import DateFormatter, WeekdayLocator
> import datetime
>
> dates = [datetime.date(2013, 3, 14), datetime.date(2014, 3, 13)]
> values = [0, 1]
> plt.ylabel('Balance')
> plt.grid()
> ax = plt.subplot(111)
> plt.plot_date(dates, values, fmt = 'rx-')
> plt.axis(xmin=dates[0], xmax=dates[-1])
> day = ?
> ax.xaxis.set_major_locator(WeekdayLocator(byweekday=day, interval=4))
> ax.xaxis.set_minor_locator(WeekdayLocator(byweekday=day))
> ax.xaxis.set_major_formatter(DateFormatter('%d/%m/%y'))
> ax.yaxis.set_major_formatter(FormatStrFormatter('£%0.2f'))
> ax.yaxis.set_minor_locator(MultipleLocator(5))
> plt.setp(plt.gca().get_xticklabels(), rotation = 45, fontsize = 10)
> plt.setp(plt.gca().get_yticklabels(), fontsize = 10)
> plt.show()
>
>
Mark,

I've found that rotation_mode='anchor' works best when rotation != 0

So that makes it:
plt.setp(plt.gca().get_xticklabels(), rotation = 45, fontsize = 10,
 rotation_mode='anchor' )

HTH,
-paul