the VIEW command

The VIEW command is a powerful alternative to SHOW, the later being inefficient when the number of spectral line channels is large.

VIEW provides a 4 panel display for 3-D data cubes, with the current channel bitmap, the integrated area bitmap, the current spectrum and the integrated intensity spectrum. The spectra can be displayed with 2 simultaneous frequency windows, a broad and a zoomed one, allowing browsing through a large number of channels. Spectral line identification (from the line catalog specified using command CATALOG) can be added by typing L when the cursor is on one of the 2 broad-band spectra.

Figure: The VIEW output.

VIEW CCT will display the cumulative flux of Clean components for all channels in just one panel, instead of a per-channel panel for SHOW CCT

Figure: The VIEW CCT output.

Similarly, VIEW NOISE will plot all pixel intensity distributions from every plane in a single panel, contrary to SHOW NOISE.

VIEW /OVERLAY allows to overlay (in contours) the plane of a second data cube. The main use is to overlay the continuum, or a plane of the current data cube to help revealing velocity structures.

VIEW will fallback to SHOW whenever it has no specific support for a given action.

Like SHOW, VIEW /NOPAUSE will not loop interactively to explore the data cube, but just display the view with its current parameters (channel, velocity range, support). The same behaviour can be obtained by setting DO_LOOP to NO.