statsmodels.discrete.discrete_model.Poisson.cdf
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Poisson.cdf(X)
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Poisson model cumulative distribution function
Parameters: X (array-like) – X
is the linear predictor of the model. See notes.Returns: Return type: The value of the Poisson CDF at each point. Notes
The CDF is defined as
\[\exp\left(-\lambda\right)\sum_{i=0}^{y}\frac{\lambda^{i}}{i!}\]where \(\lambda\) assumes the loglinear model. I.e.,
\[\ln\lambda_{i}=X\beta\]The parameter
X
is \(X\beta\) in the above formula.
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© 2006–2008 Scipy Developers
© 2006 Jonathan E. Taylor
Licensed under the 3-clause BSD License.
http://www.statsmodels.org/stable/generated/statsmodels.discrete.discrete_model.Poisson.cdf.html