Averaging spectra

To average three spectra (131, 132 and 133) type:

$>\!>$ r-g-d 131
$>\!>$ r-g-d 132; ave
$>\!>$ r-g-d 133; ave

Plot result, with

$>\!>$ n

Incidentally, note that two or more commands may be placed on one line, separated by semicolons, as shown in this example.