ECOPY N1 N2 N3 N4 -- Copies error bars from one set of spectra to another.
This routine is usefule in simulating data by getting exactly the same
error bars as real data and then adding noise with NOISE
Parameters:
N1 -- Slot number of first spectrum to copy errors INTO
N2 -- Slot number of last spectrum to copy errors INTO
N3 -- Slot number of first spectrum to get errors FROM
N4 -- Slot number of last spectrum to get errors FROM
NB It is the absolute flux errors that are copied.
This command belongs to the class: display