This module contains both the Data class and the MeasurementBase class. In a reflectometry measurement, the experimental data corresponds to the reflected intensity as a function of scattering vector Q. In a typical diffractometer, Q is a virtual axis, calculated geometrically from various motor positions. The Data class takes care of these conversions, exposing q, theta, intensity, reflectivity, and energy.
The MeasurementBase class defines a simple class that is Data, but that also has metadata.
- class islatu.data.Data(intensity, intensity_e, energy, theta=None, q_vectors=None)¶
The base class of all Islatu objects that contain data.
A numpy array containing intensities in this dataset.
A numpy array containing the corresponding errors in intensity.
A numpy array containing the probe particle’s angle of incidence at each intensity.
A numpy array containing the magnitude of the probe particle’s scattering vector for each intensity value.
The energy of the probe particle used to acquire this data. This is necessary to swap between theta and q.
intensity – A numpy array of the intensities in this dataset.
intensity_e – The errors on the intensities.
energy – The energy of the probe particle used to acquire this data.
theta – A numpy array containing the probe particle’s angle of incidence at each intensity. NOTE: only one of theta/q needs to be provided.
q_vectors – A numpy array containing the magnitude of the probe particle’s scattering vector for each intensity value. NOTE: only one of theta/q needs to be provided.
- property q_vectors: array¶
Returns self._q if this instance of Data was generated from q-data. Otherwise, converts from self._theta to q.
- property reflectivity: array¶
Returns the intensity, normalized such that the maximum value of the intensity is equal to 1. To acquire
- property reflectivity_e: array¶
Returns the errors on the intensity, divided by the maximum value of the intensity array.
Convenience method for the removal of a specific data point by its index.
indices – The indices to be removed.
- property theta: array¶
Returns self._theta if this instance of Data was generate from th-data. Otherwise, converts from scattered q to theta.