Fitting using a Template¶
Pyspeckit allows you to use a spectral template as the model to fit to your spectrum.
See pyspeckit.spectrum.models.template.
If your model spectrum only requires a shift and a scale, it’s easy to use:
from pyspeckit.spectrum.models.template import template_fitter
template = pyspeckit.Spectrum('template_spectrum.fits')
dataspec = pyspeckit.Spectrum("DataSpectrum.fits")
# Create the fitter from the template spectrum and "Register" it
template_fitter = template_fitter(template,xshift_units='angstroms')
dataspec.Registry.add_fitter('template',template_fitter,2)
# The fitted parameters are amplitude & xshift
# perform the fit:
dataspec.specfit(fittype='template',guesses=[1,0])
# print the results
print dataspec.specfit.parinfo