Debian Astro GDL packages

The IDL Astronomy Users Library is a central repository for low-level astronomy software written in the GNU Data Language (GDL). The library is not meant to be an integrated package, but rather is a collection of procedures from which users can pick and choose (and possibly modify) for their own use. Submitted procedures are given a cursory testing, but are basically stored in the library as submitted.

The library was originally written for the commercial IDL interpreter, but large parts are usable with the GDL interpreter as well. Other names for the libraries are "astron" and "idlastro".

• Landsman, W.B.: The IDL Astronomy User's Library. Astronomical Data Analysis Software and Systems II 52:246 (1993)

• Debian Astronomy Team
• Phil Wyett

• 2020.10.29+dfsg-3 (bullseye)
• 2022.09.12+dfsg-2 (sid)
• 2022.09.12+dfsg-2 (forky)
• 2022.09.12+dfsg-2 (trixie)
• 2022.06.02+dfsg-1 (bookworm)

• 101 total installations (of 268027 submissions)

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These GDL routines provide a robust and relatively fast way to perform least-squares curve and surface fitting. The algorithms are translated from MINPACK-1, which is a rugged minimization routine found on Netlib, and distributed with permission. This algorithm is more desirable than CURVEFIT because it is generally more stable and less likely to crash than the brute-force approach taken by CURVEFIT, which is based upon Numerical Recipes.

MPFIT has additional capabilities not found in CURVEFIT. Model parameters can be "frozen" (that is, held constant during the fitting process). Simple boundary constraints can be imposed on parameter values, which can be helpful to keep parameters from becoming negative, for example. Please see the documentation for the PARINFO keyword if you wish to use this facility.

• Markwardt, C. B.: Non-Linear Least Squares Fitting in IDL with MPFIT. Astronomical Data Analysis Software and Systems XVIII 411:251 (2009)

• Debian Astro Team
• Ole Streicher

• 1.85+2017.01.03-4 (trixie)
• 1.85+2017.01.03-4 (bullseye)
• 1.85+2017.01.03-4 (bookworm)
• 1.85+2017.01.03-4 (forky)
• 1.85+2017.01.03-4 (sid)

• 105 total installations (of 268027 submissions)

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GNU Data Language (GDL) is a free IDL (Interactive Data Language) compatible incremental compiler. It has full syntax compatibility with IDL 7.1. IDL is a registered trademark of ITT Visual Information Solutions. From IDL 8.0, the following language elements are supported:

• FOREACH loop
• negative array indices
• garbage collection pointers and objects
• call methods on an object using "." (e. g. object.aMemberProcedure,arg1)

The file input output system is fully implemented. GUI support (widgets) is officially provided, but it's not complete yet.

This package contains the Python library/interface.

• A. Coulais, M. Schellens, J. Gales, S. Arabas, M. Boquien, P. Chanial, P. Messmer, D. Fillmore, O. Poplawski, S. Maret, G. Marchal, N. Galmiche and T. Mermet: Status of GDL - GNU Data Language. Astronomical Data Analysis Software and Systems XIX 434:187 (2010) (eprint)

• Debian Astronomy Team
• Ole Streicher

• 0.9.9-13 (bullseye)
• 1.1.1-1 (trixie)
• 1.1.1-3 (sid)
• 1.1.1-3 (forky)
• 1.0.1-4 (bookworm)
• 1.1.2 (upstream)

• 5 regular users
• 20 recent
• 112 total installations (of 268027 submissions)

• Maintainer page
• Bugs
• Git

• Home page
• Bugs
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