code: def transform_raw_abundance(biomf, fn=math.log10, sampleIDs=None, sample_abd=True):
      
      totals = raw_abundance(biomf, sampleIDs, sample_abd)
      return {sid: fn(abd) for sid, abd in totals.items()}
docs: Function to transform the total abundance calculation for each sample ID to another
      format based on user given transformation function.
  
      :type biomf: A BIOM file.
      :param biomf: OTU table format.
  
      :param fn: Mathematical function which is used to transform smax to another format.
                 By default, the function has been given as base 10 logarithm.
  
      :rtype: dict
      :return: Returns a dictionary similar to output of raw_abundance function but with
               the abundance values modified by the mathematical operation. By default, the
               operation performed on the abundances is base 10 logarithm.