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LAS\IGNORE List_of_Observations [/SCAN iscan]
This command can be used to declared the specified list of Observations
(from the INPUT file) to be ignored in all FIND operations. They effec-
tively become invisible to CLASS (except in a LIST IN command), until a
FILE IN command is typed again. The input file is not physically modi-
fied however. The list of observation may have the same format as the
index list of a FOR command.
Ignore all observations with scan number 'iscan'.