Python Matplotlib 中对于 bar 显示时间的问题

参考:

官方教程:

http://matplotlib.org/1.3.1/users/recipes.html

http://stackoverflow.com/questions/13515471/matplotlib-how-to-prevent-x-axis-labels-from-overlapping-each-other

# Tell matplotlib to interpret the x-axis values as dates
ax.xaxis_date()

# Make space for and rotate the x-axis tick labels
fig.autofmt_xdate()

这两句很重要，可以不再看到叠在一起的字符串

格式化时间字符串

http://stackoverflow.com/questions/3486121/how-to-plot-data-against-specific-dates-on-the-x-axis-using-matplotlib

下面这个链接是说如何旋转x轴的字符

http://stackoverflow.com/questions/10998621/rotate-axis-text-in-python-matplotlib

其他的一些参考

http://stackoverflow.com/questions/10279778/matplotlib-centered-bar-chart-with-dates