Midas...> `PLOT/CALIBRATE`

plots the central row of the comparison spectrum and adds
the line identifications obtained. This plot can be used for coarse
consistency checks. A hardcopy may be handy for future, similar work.

Midas...> `PLOT/RESIDUAL`

displays the residuals (column :RESIDUAL in table **line.tbl**) as
a function of wavelength. This command is used to judge the quality of
the calibration.

Midas...> `PLOT/DELTA`

plots the dispersion relation and the residual value as
a function of the wavelength. Note that `PLOT/RESIDUAL`
and `PLOT/DELTA` display the rms
of the residuals. It is also possible to display, for all rows,
the residuals for a given line of wavelength ``wavelength'' with:

Midas...> `PLOT/DISTORTION` ``wavelength''

The wavelength value must correspond to a value from the catalog . The residuals are plotted in the graphic window with a scale such that the full extent of the graph corresponds to one pixel of the spectrum.