Skip to main content

A Pythonic wrapper around R's ggplot

Project description

pyggplot is a Pythonic wrapper around the [R ggplot2 library](http://had.co.nz/ggplot2/).

It is based on a a straightforward take [Pandas](http://pandas.pydata.org/) data frames and shove them into [R](http://www.r-project.org/) via [rpy2](https://pypi.python.org/pypi/rpy2) approach.

## Examples Please visit http://nbviewer.ipython.org/url/tyberiusprime.github.io/pyggplot/pyggplot%20samples.ipynb

## Installation

The easiest installation is via [PyPI](https://pypi.python.org/pypi).

$ pip install pyggplot

You may be required to update pandas, rpy2, so you may be required to run

$ pip install –upgrade pyggplot

## Usage

import pandas as pd import numpy as np import ggplot

df = pd.DataFrame({‘x’: np.random.rand(100),
‘y’: np.random.randn(100), ‘group’: [‘A’,’B’] * 50})

p = pyggplot.Plot(df) p.add_scatter(‘x’,’y’, color=’group’) p.render(‘output.png’) ## or if you want to use it in IPython Notebook # p.render_notebook()

## Further usage

Takes a pandas.DataFrame object, then add layers with the various add_xyz functions (e.g. add_scatter).

Refer to the ggplot documentation about the layers (geoms), and simply replace geom_* with add_*. See: http://docs.ggplot2.org/0.9.3.1/index.html

You do not need to separate aesthetics from values - the wrapper will treat a parameter as value if and only if it is not a column name. (so y = 0 is a value, color = ‘blue’ is a value - except if you have a column ‘blue’, then it is a column!. And y = ‘value’ does not work, but that seems to be a ggplot issue).

When the DataFrame is passed to R:

  • row indices are turned into columns with ‘reset_index’,
  • multi level column indices are flattened by concatenating them with ‘ ‘, that is (X, ‘mean’) becomes ‘x mean’.

Error messages are not great - most of them translate to ‘one or more columns were not found’, but they can appear as a lot of different actual messages such as

  • argument “env” is missing, with no default
  • object ‘y’ not found
  • object ‘dat_0’ not found
  • requires the following missing aesthetics: x
  • non numeric argument to binary operator

without actually quite pointing at what is strictly the offending value. Also, the error appears when rendering (or printing in the [IPython Notebook](http://ipython.org/notebook.html)), not when adding the layer.

## Open questions

  • the stat support is not great - it doesn’t easily map into pythonic objects. For now, do your stats in pandas - more powerful anyhow!
  • how could error messages be improved?

## Other ggplots’ for python

Project details


Release history Release notifications

This version
History Node

23

History Node

22

History Node

21

History Node

20

History Node

19

History Node

17

History Node

16

History Node

15

History Node

13

History Node

12

History Node

11

History Node

10

History Node

8

History Node

7

History Node

6

History Node

5

History Node

3

History Node

2

History Node

1

Download files

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

Filename, size & hash SHA256 hash help File type Python version Upload date
pyggplot-23.tar.gz (21.8 kB) Copy SHA256 hash SHA256 Source None May 21, 2015

Supported by

Elastic Elastic Search Pingdom Pingdom Monitoring Google Google BigQuery Sentry Sentry Error logging CloudAMQP CloudAMQP RabbitMQ AWS AWS Cloud computing DataDog DataDog Monitoring Fastly Fastly CDN DigiCert DigiCert EV certificate StatusPage StatusPage Status page