Get Primary Isotherm Data

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mic.isotherm(press_type='rel', sample_number=0, item=''):

Get isotherm data.

Keyword arguments:

  press_type    --- the pressure basis; use 'rel' for relative pressure,
                    'abs' for absolute (default = 'rel'). This is ignored
                    if the 'item' argument is also used.

  sample_number --- Sample to retrieve
                    0           : current sample file (default)
                    1 through 8 : corresponding overlay sample file

  item          --- string identifying the item to be returned.
                    For example; 'absolute pressure', or 'quantity adsorbed'
                    The default is an empty string for which the return
                    value is the below list of quantities

Usage for specified item:
  prel = mic.isotherm(sample_number=0, item='relative pressure')

Usage with tuple returned:
  p, qads, n_ads, warm_fs, cold_fs, mass, desc = mic.isotherm('rel')

  p       --- array of pressure (relative or absolute)
  qads    --- array of cumulative quantity adsorbed
  num_ads --- number of points in the adsorption curve
  warm_fs --- warm free-space
  cold_fs --- cold free-space
  mass    --- sample mass
  desc    --- sample description