Matplotlib axes label
john106henry at hotmail.com
Fri Mar 2 22:31:30 CET 2007
On Mar 2, 7:22 am, attn.steven.... at gmail.com wrote:
> On Mar 2, 7:02 am, "John Henry" <john106he... at hotmail.com> wrote:
> > On Mar 1, 10:07 pm, "John Henry" <john106he... at hotmail.com> wrote:
> > > On Mar 1, 9:53 pm, attn.steven.... at gmail.com wrote:
> > > > You can try adjusting the labels and ticks
> > > > using matplotlib.ticker.
> > > > To the example you cited, one can add
> > > > from matplotlib.ticker import MultipleLocator, FormatStrFormatter
> > > > # ...
> > > > minorLocator = MultipleLocator(0.1)
> > > > minorFormattor = FormatStrFormatter('%0.1f')
> > > > ax.yaxis.set_minor_locator(minorLocator)
> > > > ax.yaxis.set_minor_formatter(minorFormattor)
> > > > show()
> > > Thank you for the response. Yes, adding those lines did work.
> > > But what exactly is going on here? Why would adding these two lines
> > > works?
> > > Thanks,
> > Okay, I played with the ticker formater and locator routines.
> > Unfortunately, it doesn't help. The locator sets the major value and
> > the formatter determines how the axes label is formatted. It doesn't
> > gurantee that the first label starts at the origin. Half of my plots
> > works, and half of them doesn't.
> As default, matplotlib places labels and tick marks
> at major ticks. Minor ticks are invisible as
> a default.
> The lines that I added turned on *minor*
> ticks and their labels; I set them to appear
> at integer multiples of 0.1 and I
> formatted them as floating point numbers.
> There's nothing to prevent you from
> having minor ticks appear at intervals
> that exceed those of major ticks. E.g.,
> minorLocator = MultipleLocator(1.1)
> # etc.
> Hope this helps,
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