__init__(self,
frq=None,
gx=None,
gh=None,
mu0=None,
h_bar=None)
(Constructor)
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Consistency tests for data acquired at different magnetic fields.
These three tests are used to assess the consistency of datasets
aquired at different magnetic fields. Inconsistency can affect extracted
information from experimental data and can be caused by variations in
temperature, concentration, pH, water suppression, etc. The approach is
described in Morin & Gagne (2009) JBNMR, 45: 361-372.
This code calculates three functions for each residue. When comparing
datasets from different magnetic fields, the value should be the same for
each function as these are field independent. The J(0) function is the
spectral density at the zero frequency and is obtained using a reduced
spectral density approach (Farrow et al. (1995) JBNMR, 6: 153-162). The
F_eta and F_R2 functions are the consistency functions proposed by
Fushman et al. (1998) JACS, 120: 10947-10952.
To assess the consistency of its datasets, one should first calculate
one of those values (J(0), F_eta and F_R2, preferentially J(0) as
discussed in Morin & Gagne (2009) JBNMR, 45: 361-372) for each field.
Then, the user should compare values obtained for different magnetic
fields. Comparisons should proceed using correlation plots and
histograms, and the user could also calculate correlation, skewness and
kurtosis coefficients.
For examples, see Morin & Gagne (2009) JBNMR, 45: 361-372.
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