SciPy-User

Download

scipy-user@python.org

September 2010

91 participants
92 discussions

ANN: Veusz 1.9
by Jeremy Sanders Sept. 1, 2010

Sept. 1, 2010

Veusz 1.9 --------- Velvet Ember Under Sky Zenith ----------------------------- http://home.gna.org/veusz/ Veusz is Copyright (C) 2003-2010 Jeremy Sanders <jeremy(a)jeremysanders.net> 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/SVG 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. Data can be captured from external sources such as internet sockets or other programs. Changes in 1.9: * Added "Dataset plugins" to easily allow the user to write or load Python code to make new datasets, optionally linked to existing datasets. Includes plugins as standard for - Adding and multiplying constants or datasets - Dividing datasets - Computing means of datasets - Computing extremes of datasets - Joining or combining datasets as parts or element by element - Thinning points from datasets - Converting from polar to Cartesian coordinates - Filtering datasets using expressions See here for details: http://barmag.net/veusz-wiki/DatasetPlugins * Added "Tools plugins" which allow the user to write Veusz macros in Python which can take parameters and be added to the menu. Includes plugins for - Randomizing or replacing colors - Finding and replacing text - Increasing / decreasing font sizes - Cloning widgets for different datasets See here for details: http://barmag.net/veusz-wiki/ToolsPlugins * C++ code added to speed up data to image conversion * Add vector field plot type * Add text dataset support for Import plugins * Add "Node" embedding interface to easily allow manipulation of the widget/setting tree. See http://barmag.net/veusz-wiki/EmbeddingPython * Veusz now starts in home directory or previous directory used. This can be switched off in the preferences dialog to use current directory. * Distances specified in points now show drop down box with common point sizes to make increasing/decreasing sizes much easier. Minor features added: * Color selectors are updated if new colors added to other color selectors * Exception dialog box uses web to send data rather than email, so no mail transfer agent is required. * Text entry box brought up with '..' goes away when clicking outside it * Improvements to appearance of buttons in Mac OS X Bug fixes: * Fixed dataset expressions for zero-dimension expressions * Dialog boxes are properly destroyed on closing to stop memory leaks * Do not give error if same dataset defined in dataset dialog and descriptor in data file * Fix license on some C++ files * Use correct web browser when clicking on links in menus * Exceptions are caught and user notified when loading plugins * Missing recent files are removed from recent files menu * Non finite values ignored when fitting data * When fitting data min and max properties used if set 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 * Vector field plots * 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, FITS and user-plugin importing * Data can be captured from external sources * User defined functions, constants and can import external Python functions * Plugin interface to allow user to write or load code to - import data using new formats - make new datasets, optionally linked to existing datasets - arbitrarily manipulate the document Requirements for source install: 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 and better SVG export, PyQt >= 4.6 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). The examples are also useful documentation. Please also see and contribute to the Veusz wiki: http://barmag.net/veusz-wiki/ Issues with the current version: * Plots can sometimes be slow using antialiasing. Go to the preferences dialog or right click on the plot to disable antialiasing. * Some recent versions of PyQt/SIP will causes crashes when exporting SVG files. Update to 4.7.4 (if released) or a recent snapshot to solve this problem. If you enjoy using Veusz, I would love to hear from you. Please join the mailing lists at https://gna.org/mail/?group=veusz to discuss new features or if you'd like to contribute code. The latest code can always be found in the SVN repository. Jeremy Sanders

1 0

Developer Job Openings at Space Telescope Science Institute
by Perry Greenfield Sept. 1, 2010

Sept. 1, 2010

We are advertising for two different positions at the Space Telescope Science Institute (located on the Johns Hopkins University Campus in Baltimore, Md). STScI is seeking Senior Systems Software Engineers to develop applications to calibrate and analyze data from the Hubble and the James Webb Space Telescopes. **************************************************************************** First position: Description The developer will work with other members of the Science Software Branch and instrument scientists to develop applications to calibrate and analyze data from the Hubble Space Telescope and its successor, the James Webb Space Telescope, as well as other astronomy-related projects. The individual will be developing open source applications primarily in Python and C, using open source tools developed at STScI, such as PyRAF and PyFITS, and elsewhere. Some projects may involve developing software applications or libraries as part of a team, or leading a team. Requirements Candidates should have experience writing applications to calibrate, reduce, and analyze scientific data, preferably astronomical data. A background in astronomy and experience with astronomical data reduction is highly desirable. Candidates should have experience writing large programs in a compiled language as well as experience with an interpreted language such as IDL, Matlab, or Python. Experience using array manipulations facilities such as are available in IDL, Matlab, numpy/numarray, or APL is a plus. Experience using software engineering tools such as debuggers, CVS or subversion, and bug trackers is strongly desired. Strong analytical, problem-solving, planning, and organizational skills are needed, and excellent written and verbal communication skills are essential. Prior experience in developing medium or large projects sufficient to demonstrate the specified knowledge, skills and abilities is required. Qualified candidates should possess a Bachelor's degree in a science- related field such as Physics, Astronomy, or Mathematics. A Master's or Ph.D degree is desirable. Substitution of additional relevant education or experience for the stated qualifications may be considered. Apply through the following link: https://www.ultirecruit.com/SPA1004/jobboard/JobDetails.aspx?__ID=*6D48E0EF… **************************************************************************** Second position: Description The developer will work with other members of the Science Software Branch to help in enhancing and maintaining our Python-based framework for developing astronomical data analysis and calibration applications. STScI has pioneered in the generation of tools for using Python for scientific analysis and programming through its development of PyRAF, numarray, PyFITS, and contributions to other Python Open Source projects. The individual being sought will help STScI maintain its leadership in this area by developing leading-edge capabilities by enhancing existing tools such as PyRAF and PyFITS, contributing to scipy, numpy, and matplotlib, and developing new libraries to meet the needs of future astronomical processing. Some projects may involve developing software tools as part of a team, or leading a team. Work will also require working with an external community on Open Source software projects. Requirements Candidates should be experienced with systems-level programming, preferably with C or C++ and familiar with variances in processor and operating system architectures (preferably Linux, OS X, and MS Windows) with regard to file systems, memory, data types and efficiency, as well as modern software development techniques including Object-Oriented design and programming. Experience with Python and writing C extensions for Python is highly desirable. A working knowledge of any of the following would be a plus: parsers, code generation, numerical techniques, image processing and data analysis, web and network protocols, or parallel processing. Experience using software engineering tools such as debuggers, version control systems (e.g., subversion), and bug trackers is strongly desired. Strong analytical, problem-solving, planning, and organizational skills are needed, and excellent written and verbal communication skills are essential. Prior experience in developing medium or large projects sufficient to demonstrate the specified knowledge, skills and abilities is required. Qualified candidates should possess a Bachelor's Degree in Computer Science, Physics, Math, or technically related field. Master's degree preferred. Substitution of additional relevant education or experience for the stated qualifications may be considered. Apply through the following link: https://www.ultirecruit.com/SPA1004/jobboard/JobDetails.aspx?__ID=*85D01A9E… **************************************************************************** STScI offers an excellent benefits package, tuition reimbursement, competitive salaries, and a stimulating work environment. Interested candidates are requested to complete an on-line application, attach a resume in the "Resume Upload Section." Please include job #10-0083 in the filename. Resumes received by October 15, 2010 will receive full consideration. Committed to the benefits of diversity, we strongly encourage qualified women and minority candidates to apply. EOE/AA/M/F/D/V.

1 0