Pygraph

What Pygraph is

Pygraph is a freely available, lightweight and easy to use visualization client for viewing 1D data files. The idea of Pygraph was suggested by the need for an alternative to the software ygraph which is not developed anymore. Therefore, Pygraph is a Python reimplementation of ygraph.

Pygraph has been developed in Python (version 2.x) and the graphical interface was built with PyQt4, the Python binding library of the famous Qt4 framework, and PyQwt, the binding of the Qwt library. Pygraph also uses other libraries such as texttables and scidata. See the README released with the sources for further details.

What Pygraph can do

Pygraph inherits most of the features of ygraph, in addition to many others, such as

An handy bar to navigate through timesteps
One-click visibility toggle of single datasets
Powerful zooming capabilities with handy mouse shortcuts
Plot customization options, s.a. grid toggle, axis label editing, logscale axis
Frame-Per-Second speed regulation
Data transformation with algebraic functions or differentials
"Show all" function to show all frames at once
Massive frame export to images, convenient for video generation

Furthermore, pygraph provides a set of useful command line parameters to accomplish simple operations such as

Opening multiple files at once; this supports wildcard expansion of *
Merging separated datasets into a single one
Dataset combining, plotting one dataset using the other dataset as its x-data

Pygraph supports various data formats, such as ASCII-carpet asc, xg and HDF5; besides, it's quite easy to extend it to support other file formats.

The developers

Pygraph is developed and mantained by two people

Massimiliano Leoni - Politecnico di Milano, Milan, Italy - massimiliano2.leoni [[ at ]] mail.polimi.it
David Radice - California Institute of Technology, Pasadena (CA), USA - dradice[at]caltech.edu

Obtaining pygraph

Pygraph is hosted on bitbucket at https://bitbucket.org/dradice/pygraph. It can be installed with a simple command line instruction; please make sure you also install all required dependencies.

Credits and acknowledgements

PyQt reference: Summerfield - "Rapid GUI Programming with Python and Qt"
Logo: Giulio Colombo - giulio.colombo.1994 [[ at ]] gmail.com

Install package for OS-X

OS-X users can install Pygraph and all its dependencies with the following package

OS-X installer

A sample video

Screenshots

Pygraph plotting a simple sine function.

The "Show all" function for a wave propagation. The lines color fade from black [first frame] to blue [last frame].