Calculate exponential probabolity density function.
Parameters : | t : float
tau : ndarray, shape(k, 1)
area : ndarray, shape(k, 1)
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Returns : | f : float |
Calculate mean and standard deviation for exponential PDF.
Parameters : | tau : ndarray, shape(k, 1)
area : ndarray, shape(k, 1)
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Returns : | m : float
sd : float
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Calculate mean and standard deviation for geometric PDF.
Parameters : | rho : ndarray, shape(k, 1)
w : ndarray, shape(k, 1)
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Returns : | m : float
sd : float
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