`dask_ml.linear_model`.PoissonRegression¶

class dask_ml.linear_model.PoissonRegression(penalty='l2', dual=False, tol=0.0001, C=1.0, fit_intercept=True, intercept_scaling=1.0, class_weight=None, random_state=None, solver='admm', max_iter=100, multi_class='ovr', verbose=0, warm_start=False, n_jobs=1, solver_kwargs=None)¶

Esimator for poisson regression.

Parameters

penaltystr or Regularizer, default ‘l2’

Regularizer to use. Only relevant for the ‘admm’, ‘lbfgs’ and ‘proximal_grad’ solvers.

For string values, only ‘l1’ or ‘l2’ are valid.

dualbool

Ignored

tolfloat, default 1e-4

The tolerance for convergence.

Cfloat

Regularization strength. Note that dask-glm solvers use the parameterization \(\lambda = 1 / C\)

fit_interceptbool, default True

Specifies if a constant (a.k.a. bias or intercept) should be added to the decision function.

intercept_scalingbool

Ignored

class_weightdict or ‘balanced’

Ignored

random_stateint, RandomState, or None

The seed of the pseudo random number generator to use when shuffling the data. If int, random_state is the seed used by the random number generator; If RandomState instance, random_state is the random number generator; If None, the random number generator is the RandomState instance used by np.random. Used when solver == ‘sag’ or ‘liblinear’.

solver{‘admm’, ‘gradient_descent’, ‘newton’, ‘lbfgs’, ‘proximal_grad’}

Solver to use. See Algorithms for details

max_iterint, default 100

Maximum number of iterations taken for the solvers to converge.

multi_classstr, default ‘ovr’

Ignored. Multiclass solvers not currently supported.

verboseint, default 0

Ignored

warm_startbool, default False

Ignored

n_jobsint, default 1

Ignored

solver_kwargsdict, optional, default None

Extra keyword arguments to pass through to the solver.

Attributes

coef_array, shape (n_classes, n_features): The learned value for the model’s coefficients
intercept_float of None: The learned value for the intercept, if one was added to the model

Examples

>>> from dask_glm.datasets import make_counts
>>> X, y = make_counts()
>>> lr = PoissonRegression()
>>> lr.fit(X, y)
>>> lr.predict(X)
>>> lr.predict(X)
>>> lr.get_deviance(X, y)

Methods

`fit`(self, X[, y])	Fit the model on the training data
`get_params`(self[, deep])	Get parameters for this estimator.
`predict`(self, X)	Predict count for samples in X.
`set_params`(self, \\params)	Set the parameters of this estimator.

get_deviance

__init__(self, penalty='l2', dual=False, tol=0.0001, C=1.0, fit_intercept=True, intercept_scaling=1.0, class_weight=None, random_state=None, solver='admm', max_iter=100, multi_class='ovr', verbose=0, warm_start=False, n_jobs=1, solver_kwargs=None)¶: Initialize self. See help(type(self)) for accurate signature.

family¶: The family this estimator is for.

fit(self, X, y=None)¶

Fit the model on the training data

Parameters

X: array-like, shape (n_samples, n_features)
yarray-like, shape (n_samples,)

Returns

selfobjectj

get_params(self, deep=True)¶

Get parameters for this estimator.

Parameters

deepboolean, optional: If True, will return the parameters for this estimator and contained subobjects that are estimators.

Returns

paramsmapping of string to any: Parameter names mapped to their values.

predict(self, X)¶

Predict count for samples in X.

Parameters

Xarray-like, shape = [n_samples, n_features]

Returns

Carray, shape = [n_samples,]: Predicted count for each sample

set_params(self, **params)¶

Set the parameters of this estimator.

The method works on simple estimators as well as on nested objects (such as pipelines). The latter have parameters of the form <component>__<parameter> so that it’s possible to update each component of a nested object.

Returns

self

dask_ml.linear_model.PoissonRegression¶

`dask_ml.linear_model`.PoissonRegression¶