Changeset 1264 for branches


Ignore:
Timestamp:
09/11/06 21:44:12 (18 years ago)
Author:
phi196
Message:

Updates from 2.1b tag

File:
1 edited

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  • branches/Release2.1/doc/userguide.tex

    r1243 r1264  
    12881288\section{Line Catalog}
    12891289
    1290 \index{Linecatalog}ASAP can load and manipulate line catlogs to retrieve rest frequencies
    1291 for \cmd{set\_restfreqs} and for line identification in the
    1292 plotter. No line catalogs are built into ASAP, the user must load a
    1293 ASCII based table (which can optionally be saved in an internal
    1294 format) either of the users own creation or a standard line catalog
    1295 such as the JPL line catalog or Lovas. The ATNF asap ftp area as
    1296 copies of the JPL and Lovas catalog in the appropriate format. All
    1297 line catalogs are loaded into a ``linecatalog'' object.
     1290\index{Linecatalog}ASAP can load and manipulate line catlogs to
     1291retrieve rest frequencies for \cmd{set\_restfreqs} and for line
     1292identification in the plotter. No line catalogs are built into ASAP,
     1293the user must load a ASCII based table (which can optionally be saved
     1294in an internal format) either of the users own creation or a standard
     1295line catalog such as the JPL line catalog or Lovas. The ATNF asap ftp
     1296area as copies of the JPL and Lovas catalog in the appropriate
     1297format. All line catalogs are loaded into a ``linecatalog'' object.
    12981298
    12991299\subsection{Loading a Line Catalog}
     
    16501650session. This has the adtantage of speed, but causes limits on the
    16511651size of the dataset which can be loaded. ASAP can use ``disk based''
    1652 scan tables which
     1652scan tables which cache the bulk of the scantable on disk and require
     1653significantely less memory usage.
     1654
     1655To use disk based tables you either need to change the default in your
     1656\cmd{.asapr} file, e.g.
     1657\begin{verbatim}
     1658   scantable.storage          : disk
     1659\end{verbatim}
     1660
     1661or use set the ``\cmd{rc}'' value while running asap to change this
     1662on-the-fly. E.g.
     1663\begin{verbatim}
     1664  ASAP>rc('scantable',storage='disk')
     1665  ASAP>data = scantable('data.rpf')     # Loaded using disk based table
     1666  ASAP>rc('scantable',storage='memory') # Memory tables will be used now
     1667\end{verbatim}
     1668
     1669Changing the ``\cmd{rc}'' value affects the next time the
     1670\cmd{scantable} constructor is called.
    16531671
    16541672{\bf NOTE: } Currently a bug in ipython means temporary files are not
    16551673cleaned up properly when you exit ASAP. If you use disk based scan
    1656 tables your directory will be left with 'tmp*' directories. These can
     1674tables your directory will be left with 'tabXXXXX_X' directories. These can
    16571675be safely removed if ASAP is not running.
    16581676
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