The linecatalog has a number of selection functions to select a range of lines from a larger catalog (the JPL catalog has 180000 lines for example). set_frequency_limits selects on frequency range, set_strength_limits selects on intensity while set_name selects on molecule name (wild cards allowed). The summary function lists the currently selected lines.
ASAP>jpl = linecatalog('jpl.tbl') ASAP>jpl.set_frequency_limits(80,115,'GHz') # Lines for 3mm receiver ASAP>jpl.set_name('*OH') # Select all alcohols ASAP>jpl.set_name('OH') # Select only OH molecules ASAP>jpl.summary() ASAP>jpl.reset() # Selections are accumulative ASAP>jpl.set_frequency_limits(80,115,'GHz') ASAP>jpl.set_strength_limits(-2,10) # Select brightest lines ASAP>jpl.summary()