On Mon, Mar 18, 2013 at 8:34 PM, Mark Lawrence <breamore...@yahoo.co.uk>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
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