Re: [Matplotlib-users] Settling y-axis scaling

[John H. <jdh...@ac...>]

>>>>> "Vineet" == Vineet Jain <vi...@al...> writes:

    Vineet> After making changes to has_data I get the following:
    Vineet> (0.0, 400.0) (0.0, 400.0) (0.0, 400.0)

    Vineet> which is not correct it should be:

    Vineet> (300.0, 400.0) (100.0, 400.0) (100.0, 400.0)

I'm not sure this is incorrect.  matplotlib distinguishes between the
data limits and the view limits.  The latter are automatically
adjusted to include the data limits but may incorporate more.  For
example, the x data limits in [0.1, 10] may produce view limits
[0,10].

If you need the view limits to always equal the data limits, you could
provide a custom ticker, as described in
http://matplotlib.sourceforge.net/matplotlib.ticker.html and
illustrated in the example
http://matplotlib.sourceforge.net/examples/custom_ticker1.py.

You might want to verify that the data limits are correct by printing

  ax.dataLim.intervalx().get_bounds()  # the x limits
  ax.dataLim.intervaly().get_bounds()  # the y limits

where ax is your Axes instance.  You can compare these with

  ax.viewLim.intervalx().get_bounds()  # the x limits
  ax.viewLim.intervaly().get_bounds()  # the y limits

JDH