is_effective(x)# S3 method for default
is_effective(x)
# S3 method for waveband
is_effective(x)
# S3 method for generic_spct
is_effective(x)
# S3 method for source_spct
is_effective(x)
# S3 method for summary_generic_spct
is_effective(x)
# S3 method for summary_source_spct
is_effective(x)