Starting from March 2010, Weeds is distributed with GILDAS. Provided that you have installed GILDAS with the Python extension (named PyGILDAS)1you should have Weeds already installed on your computer. If this is not the case, please refer to the GILDAS documentation for instructions on how to install PyGILDAS.
Let us first start CLASS from a terminal:
[fontsize=\footnotesize] % class % class GILDAS Version: dev (28jul10 11:09) (x86_64-darwin-gfortran) source tree Python 2.6.5 (r265:79063, Jul 20 2010, 00:26:30) [GCC 4.2.1 (Apple Inc. build 5659)] on darwin Importing all SIC variables into Python... ... done. * Welcome to CLASS * Loaded modules atm sic (J.Pety, S.Bardeau, S.Guilloteau, E.Reynier) greg (J.Pety, S.Bardeau, S.Guilloteau, E.Reynier) ephem (F.Gueth, J.Pety) class (J.Pety, P.Hily-Blant, S.Guilloteau) * Loaded extensions weeds (S.Maret, P.Hily-Blant, J.Pety, S.Bardeau, E.Reynier) (...) LAS>
Note that the welcome message mention that the Weeds extension as been
loaded. The extension defines a language, named weeds\
. This
language has a number of command, whose list can be obtained by
typing:
[fontsize=\footnotesize] LAS90> help weeds\ USER\WEEDS = " Weeds is a CLASS extension to analyse spectral surveys or spectral lines observations with large bandwidths. It provides several commands to identify lines on a spectrum and to model it. Available commands: DBSELECT Select an atomic and molecular line database DBCACHE Cache an atomic and molecular line database LID Identify lines on the current spectra LFIND Find lines from a species within a frequency range LLIST List lines from the line index LGET Get a line from the line index LPLOT Plot a line from the current line index MODSOURCE Model the emission of a source at the LTE MODSHOW Show the results of MODSOURCE For more information of each command, type 'help <command>'
Each of the command provided by Weeds as an extensive
documentation. Type help
followed by the command name to read
it.