Specdata

Important modules

• modules/ana

  This package contains modules used for
  processing/analyzing x-ray data. More specifically
  the modules are geared towards processing surface
  diffraction, reflectivity and reflection
  standing wave (and other related) data.
  

• modules/specfile

  This module is an interface to reading various types
  of x-ray scan data collected with spec
  

Examples

• Read a spec file and the first scan, display it and plot some data

• In the below example 'r' is a specfile.reader.Reader instance, and holds information about files and parameters

• Note that the object returned from the r is a ScanData object.

  >>import specfile
  >>r = specfile.reader.Reader(spec='spec_file.spc')
  >>s1 = r.spec_scan(1)
  >>plot(s1['theta'],s1['I1'])
  

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• Read a spec file and list all the scans

• Then read first scan including images

  >>import specfile
  >>r = specfile.reader.Reader(spec='caco3_feb09j.spc')
  >>r.list_spec()
  >>s = r.spec_scan(1,image=True)
  

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• Read a file on the defined path

• Then get scan 42 (with images)

  >>spec_path='spec/'
  >>reader = specfile.reader.Reader(spec_path=spec_path)
  >>reader.read_spec('gt_6_apr07_c.spc')
  >>d = reader.spec_scan(42,image=True)
  

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• Read the file given the specific path.

• Set the image parameters so the images are cached in a hdf file on the given path.

• Then the first scan and images (they will be cached and not stored in memory)

  >>r = specfile.reader.Reader(spec = 'caco3_feb09j.spc',spec_path='spec/')
  >>r.image_params['archive'] = {'path':'d:\\tmp'}
  >>s = r.spec_scan(1, image = True)
  

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• Read spec scan with spectra. Note tau value corresponds to the deadtime value

• This is a single element detector since there is a single tau value.

  >>reader = specfile.reader.Reader(spec='spec/bb405_0405.spc')
  >>reader.spectra_params['tau'] = 1.0e-8
  >>reader.spectra_params['lines'] = ['Ca ka','Ca kb','Ti ka','Ti kb','Mn ka','Mn kb', 'Fe ka', 'Fe kb']
  >>s6 = reader.spec_scan(6,med=True,xrf=True)
  

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