Re: [Matplotlib-users] bar with zero data

[Benjamin R. <ben...@ou...>]

On Mon, Nov 22, 2010 at 7:56 AM, andres luhamaa <and...@gm...>wrote:

> Hello!
> I see strange behaviour in plotting bars with dates on x-axis. Example
> attached, problem seems to arise only after duplicating x-axis and with
> all-zero data. good.png is with non-zero data and bad.png with zero data.
>
> Regards,
> Andres
>
>
I noticed some issues recently with another bug report regarding bar
charts.  It seems that if the first bar (maybe even the last bar) is of zero
height, then some code somewhere doesn't properly choose the correct axes
limit.  This error here might be a degenerate form of that bug.

If anything, this indicates that the bug must be somewhere between the auto
tickers and bar().  I have checked bar() itself, and I don't see any sort of
problem.  There was a possible issue at around line 4694 in axes.py (at the
end of the bar() method), but I don't think that is the cause.

Ben Root