Veusz 1.5 --------- Velvet Ember Under Sky Zenith ----------------------------- http://home.gna.org/veusz/
Veusz is Copyright (C) 2003-2009 Jeremy Sanders email@example.com Licenced under the GPL (version 2 or greater).
Veusz is a Qt4 based scientific plotting package. It is written in Python, using PyQt4 for display and user-interfaces, and numpy for handling the numeric data. Veusz is designed to produce publication-ready Postscript/PDF output. The user interface aims to be simple, consistent and powerful.
Veusz provides a GUI, command line, embedding and scripting interface (based on Python) to its plotting facilities. It also allows for manipulation and editing of datasets.
Changes in 1.5: * EMF export (requires pyemf and PyQt snapshot) * Character encodings supported in data import * Rewritten stylesheet handling. User can now set defaults in document for all settings. This is now under the Edit->Default Styles dialog. * A default stylesheet can be loaded for all new documents (set in preferences dialog) * Linked datasets saved in documents now use relative filename paths (with absolute paths as fallback) * Axes can now have text labels of points plotted along them (choose "labels" as axis mode) * Dataset points can be scaled to different sizes according to another dataset (this is the "Scale markers" option for point plotters)
More minor changes * Custom delimiter support in CSV data importer * Add SetDataText and support text in GetData in command API * \dot and \bar added to LaTeX renderer * Option to change icon sizes displayed * Rearrange toolbar icons and create data and widget operation toolbars * Zoom button remembers previous usage * Conversion from 1D->2D datasets more robust * Expression datasets can now be a constant value * Uses colors form theme better and allow user to change some UI colors in preferences * Fix contours if coordinates can be infinite (e.g. log scaling with zero value) * nan/inf are no longer ignored when the ignore text option is selected in import dialog
* Several other minor UI changes and bugfixes
Important note * As the way defaults are used has been rewritten, default values are no longer saved on a per-user basis but are saved in a stylesheet and is saved in the document. You cannot currently set defaults on a widget- name basis.
Features of package: * X-Y plots (with errorbars) * Line and function plots * Contour plots * Images (with colour mappings and colorbars) * Stepped plots (for histograms) * Bar graphs * Plotting dates * Fitting functions to data * Stacked plots and arrays of plots * Plot keys * Plot labels * Shapes and arrows on plots * LaTeX-like formatting for text * EPS/PDF/PNG/SVG/EMF export * Scripting interface * Dataset creation/manipulation * Embed Veusz within other programs * Text, CSV and FITS importing
Requirements: Python (2.4 or greater required) http://www.python.org/ Qt >= 4.3 (free edition) http://www.trolltech.com/products/qt/ PyQt >= 4.3 (SIP is required to be installed first) http://www.riverbankcomputing.co.uk/pyqt/ http://www.riverbankcomputing.co.uk/sip/ numpy >= 1.0 http://numpy.scipy.org/
Optional: Microsoft Core Fonts (recommended for nice output) http://corefonts.sourceforge.net/ PyFITS >= 1.1 (optional for FITS import) http://www.stsci.edu/resources/software_hardware/pyfits pyemf >= 2.0.0 (optional for EMF export) http://pyemf.sourceforge.net/ For EMF export, PyQt-x11-gpl-4.6-snapshot-20090906 or better is required, to fix a bug in the C++ wrapping
For documentation on using Veusz, see the "Documents" directory. The manual is in pdf, html and text format (generated from docbook).
Issues with the current version:
* Due to Qt, hatched regions sometimes look rather poor when exported to PostScript, PDF or SVG.
* Clipping of data does not work in the SVG export as Qt currently does not support this.
* Due to a bug in Qt, some long lines, or using log scales, can lead to very slow plot times under X11. This problem is seen with dashed/dotted lines. It is fixed by upgrading to Qt-4.5.1 (the Veusz binary version includes this Qt version). Switching off antialiasing in the options may help this.
If you enjoy using Veusz, I would love to hear from you. Please join the mailing lists at
to discuss new features or if you'd like to contribute code. The latest code can always be found in the SVN repository.