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import h5py |
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import numpy as np |
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import scipy.interpolate as interpolate |
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class PolarResponse(object): |
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def __init__(self, response_file): |
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""" |
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Construct the polar response from the HDF5 response file. |
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This is the POLARIZATION response. |
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:param response_file: |
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:returns: |
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:rtype: |
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""" |
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self._rsp_file = response_file |
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# pre interpolate the response for fitting |
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self._interpolate_rsp() |
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def _interpolate_rsp(self): |
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""" |
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Builds the interpolator for the response. This is currently incredibly slow |
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and should be improved |
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""" |
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# now go through the response and extract things |
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with h5py.File(self._rsp_file, 'r') as f: |
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energy = f['energy'].value |
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ene_lo, ene_hi = [], [] |
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# the bin widths are hard coded right now. |
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# this should be IMPROVED! |
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for ene in energy: |
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ene_lo.append(ene - 2.5) |
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ene_hi.append(ene + 2.5) |
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pol_ang = np.array(f['pol_ang'].value) |
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pol_deg = np.array(f['pol_deg'].value) |
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bins = np.array(f['bins'].value) |
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# get the bin centers as these are where things |
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# should be evaluated |
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bin_center = 0.5 * (bins[:-1] + bins[1:]) |
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all_interp = [] |
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# now we construct a series of interpolation |
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# functions that are called during the fit. |
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# we use some nice matrix math to handle this |
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for i, bm in enumerate(bin_center): |
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this_interpolator = interpolate.RegularGridInterpolator( |
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(energy, pol_ang, pol_deg), f['matrix'][..., i]) |
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all_interp.append(this_interpolator) |
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# finally we attach all of this to the class |
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self._all_interp = all_interp |
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self._ene_lo = ene_lo |
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self._ene_hi = ene_hi |
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self._energy_mid = energy |
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self._n_scatter_bins = len(bin_center) |
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self._scattering_bins = bin_center |
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self._scattering_bins_lo = bins[:-1] |
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self._scattering_bins_hi = bins[1:] |
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@property |
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def ene_lo(self): |
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""" |
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The low side of the energy bins |
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:returns: |
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:rtype: |
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""" |
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return self._ene_lo |
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@property |
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def ene_hi(self): |
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""" |
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The high side of the energy bins |
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:returns: |
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:rtype: |
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""" |
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return self._ene_hi |
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@property |
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def energy_mid(self): |
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""" |
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The mid point of the energy bins |
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:returns: |
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:rtype: |
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""" |
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return self._energy_mid |
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@property |
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def n_scattering_bins(self): |
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""" |
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The number of scattering angle bins |
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:returns: |
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:rtype: |
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""" |
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return self._n_scatter_bins |
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@property |
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def scattering_bins(self): |
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""" |
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The scattering angle bin CENTERS. |
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:returns: |
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:rtype: |
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""" |
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return self._scattering_bins |
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@property |
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def scattering_bins_lo(self): |
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""" |
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The low side of the scattering angle bins |
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:returns: |
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:rtype: |
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""" |
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return self._scattering_bins_lo |
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@property |
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def scattering_bins_hi(self): |
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""" |
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The high side of the scattering angle bins |
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:returns: |
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:rtype: |
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""" |
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return self._scattering_bins_hi |
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@property |
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def interpolators(self): |
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""" |
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The series of interpolation functions |
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:Returns: |
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:rtype: |
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""" |
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return self._all_interp |
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grburgess /
polarpy
