Re: [Matplotlib-users] autoscale problem?

[Darren D. <dd...@co...>]

On Wednesday 16 March 2005 07:59 pm, Darren Dale wrote:
> I suggest making the following change to ticker.py, starting
> at line 501 in version 0.72.1:
>
>     def le(self, x):
>         'return the largest multiple of base <= x'
>         d,m = divmod(x, self._base)
>         if closeto(m/self._base,1): # was closeto(m, self._base)
>             #looks like floating point error
>             return (d+1)*self._base
>         else:
>             return d*self._base
>

I was testing this bugfix with plot([1.4e-12,3.0e-12]), and noticed that the 
1.4e-12 ticklabel was being dropped.

In ticker.py, I suggest replacing Base.ge with:

    def ge(self, x):
        'return the largest multiple of base >= x'
        d,m = divmod(x, self._base)
        if closeto(m,0) and not closeto(m/self._base,1): return x
        return (d+1)*self._base

The fourth line used to be if m==0: return x, which fails sometimes due to 
floating point inaccuracy. John, remember I was complaining about how certain 
ticklabels wouldnt get rendered in the new scalarformatter I posted a couple 
weeks ago? This was the problem.

Darren