Function to trim the "instr.settings" attribute of an existing generic_spct object, by discarding some fields.
trimInstrSettings(x, fields = "*")
a generic_spct object
a character vector with the names of the fields to keep, or if first member is '"-"', the names of fields to delete; "*" as first member of the vector makes the function a no-op, leaving the spectrum object unaltered.
This function alters x itself by reference and in addition returns x invisibly. If x is not a generic_spct object, x is not modified.
Other measurement metadata functions:
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