Reducing Continuum Data

Limited processing of continuum data is available in GBTIDL. The cont procedure is used to switch to continuum mode. Continuum data comes from a separate file (also opened with filein) and there is a completely separate set of data containers in !g for holding continuum data (!g.c) . Continuum data can only be displayed with the x-axis as sample number (you do not need to do anything other than show to make that happen). There is currently no ability to save continuum data containers to disk, so the continuum functionality is rather limited. Many routines simply refuse to work with continuum data (e.g. getfs). However, the data is available in GBTIDL and so some work can be done with continuum data.

Use the line procedure to switch back to spectral-line mode.