Skip to main content

Create broken axes

Project description

brokenaxes

brokenaxes logo. Reference: http://www.brianhensley.net/2012/02/python-controlling-spi-bus-on.html

brokenaxes makes matplotlib plots with breaks in the axes for showing data across a discontinuous range.

PyPI PyPI - Downloads

Features

  • Break x and y axes.
  • Supports multiple breaks on a single axis.
  • Automatically scales axes according to relative ranges.
  • Plot multiple lines.
  • Legend with positioning relative to entire broken axes object
  • x and y label centered to entire plot
  • Make brokenaxes object a subplot itself with matplotlib.GridSpec.subplot_spec.
  • xlims and ylims may be datetime.datetime objects
  • Supports log scales.

Installation

I recommend the Anaconda python distribution and this package is available via pypi:

pip install brokenaxes

Usage

import matplotlib.pyplot as plt
from brokenaxes import brokenaxes
import numpy as np

fig = plt.figure(figsize=(5, 2))
bax = brokenaxes(xlims=((0, .1), (.4, .7)), ylims=((-1, .7), (.79, 1)), hspace=.05)
x = np.linspace(0, 1, 100)
bax.plot(x, np.sin(10 * x), label='sin')
bax.plot(x, np.cos(10 * x), label='cos')
bax.legend(loc=3)
bax.set_xlabel('time')
bax.set_ylabel('value')

example1

Create subplots

from brokenaxes import brokenaxes
from matplotlib.gridspec import GridSpec
import numpy as np

sps1, sps2 = GridSpec(2,1)

bax = brokenaxes(xlims=((.1, .3), (.7, .8)), subplot_spec=sps1)
x = np.linspace(0, 1, 100)
bax.plot(x, np.sin(x*30), ls=':', color='m')

x = np.random.poisson(3, 1000)
bax = brokenaxes(xlims=((0, 2.5), (3, 6)), subplot_spec=sps2)
bax.hist(x, histtype='bar')

example2

Log scales

import matplotlib.pyplot as plt
from brokenaxes import brokenaxes
import numpy as np

fig = plt.figure(figsize=(5, 5))
bax = brokenaxes(xlims=((1, 500), (600, 10000)),
	     ylims=((1, 500), (600, 10000)),
		 hspace=.15, xscale='log', yscale='log')

x = np.logspace(0.0, 4, 100)
bax.loglog(x, x, label='$y=x=10^{0}$ to $10^{4}$')

bax.legend(loc='best')
bax.grid(axis='both', which='major', ls='-')
bax.grid(axis='both', which='minor', ls='--', alpha=0.4)
bax.set_xlabel('x')
bax.set_ylabel('y')
plt.show()

example3

datetime

import matplotlib.pyplot as plt
from brokenaxes import brokenaxes
import numpy as np
import datetime

fig = plt.figure(figsize=(5, 5))
xx = [datetime.datetime(2020, 1, x) for x in range(1, 20)]

yy = np.arange(1, 20)

bax = brokenaxes(
    xlims=(
        (
            datetime.datetime(2020, 1, 1),
            datetime.datetime(2020, 1, 3),
        ),
        (
            datetime.datetime(2020, 1, 6),
            datetime.datetime(2020, 1, 20),
        )
    )
)

bax.plot(xx, yy)

fig.autofmt_xdate()
[x.remove() for x in bax.diag_handles]
bax.draw_diags()

import matplotlib.dates as mdates
for ax in bax.axs:
    ax.xaxis.set_major_formatter(mdates.DateFormatter('%Y-%b-%d'))

datetime_example

How do I do more?

You can customize brokenaxes outside of the supported features listed above. Brokenaxes works by creating a number of smaller axes objects, with the positions and sizes of those axes dictated by the data ranges used in the constructor. Those individual axes are stored as a list in bax.axs. Most customizations will require accessing those inner axes objects. (See the last two lines of the datetime example). There is also a larger invisible axes object, bax.big_ax, which spans the entire brokenaxes region and is used for things like x and y axis labels which span all of the smaller axes.

Gallery

If you make a plot with this tool that you are proud of, send me a png and code and I'll add it to the gallery!

Life advice

Please use this tool wisely. Any data visualization techique can be used to elucidate trends in the data, ben can also be used to manipulate and mislead. The latter is particularly true for broken axes plots, so please try to use them responsibly. Other than that, this software is free to use. See the license file for details.

Project details


Download files

Download the file for your platform. If you're not sure which to choose, learn more about installing packages.

Files for brokenaxes, version 0.5.0
Filename, size File type Python version Upload date Hashes
Filename, size brokenaxes-0.5.0-py3-none-any.whl (6.6 kB) File type Wheel Python version py3 Upload date Hashes View

Supported by

AWS AWS Cloud computing Datadog Datadog Monitoring Facebook / Instagram Facebook / Instagram PSF Sponsor Fastly Fastly CDN Google Google Object Storage and Download Analytics Huawei Huawei PSF Sponsor Microsoft Microsoft PSF Sponsor Pingdom Pingdom Monitoring Salesforce Salesforce PSF Sponsor Sentry Sentry Error logging StatusPage StatusPage Status page