GaussianMixtureModel¶
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class
pyspark.ml.clustering.
GaussianMixtureModel
(java_model=None)[source]¶ Model fitted by GaussianMixture.
New in version 2.0.0.
Methods
Attributes
Methods Documentation
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clear
(param)¶ Clears a param from the param map if it has been explicitly set.
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copy
(extra=None)¶ Creates a copy of this instance with the same uid and some extra params. This implementation first calls Params.copy and then make a copy of the companion Java pipeline component with extra params. So both the Python wrapper and the Java pipeline component get copied.
- Parameters
extra – Extra parameters to copy to the new instance
- Returns
Copy of this instance
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explainParam
(param)¶ Explains a single param and returns its name, doc, and optional default value and user-supplied value in a string.
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explainParams
()¶ Returns the documentation of all params with their optionally default values and user-supplied values.
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extractParamMap
(extra=None)¶ Extracts the embedded default param values and user-supplied values, and then merges them with extra values from input into a flat param map, where the latter value is used if there exist conflicts, i.e., with ordering: default param values < user-supplied values < extra.
- Parameters
extra – extra param values
- Returns
merged param map
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getAggregationDepth
()¶ Gets the value of aggregationDepth or its default value.
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getFeaturesCol
()¶ Gets the value of featuresCol or its default value.
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getK
()¶ Gets the value of k
New in version 2.0.0.
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getMaxIter
()¶ Gets the value of maxIter or its default value.
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getOrDefault
(param)¶ Gets the value of a param in the user-supplied param map or its default value. Raises an error if neither is set.
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getParam
(paramName)¶ Gets a param by its name.
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getPredictionCol
()¶ Gets the value of predictionCol or its default value.
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getProbabilityCol
()¶ Gets the value of probabilityCol or its default value.
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getSeed
()¶ Gets the value of seed or its default value.
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getTol
()¶ Gets the value of tol or its default value.
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getWeightCol
()¶ Gets the value of weightCol or its default value.
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hasDefault
(param)¶ Checks whether a param has a default value.
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hasParam
(paramName)¶ Tests whether this instance contains a param with a given (string) name.
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isDefined
(param)¶ Checks whether a param is explicitly set by user or has a default value.
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isSet
(param)¶ Checks whether a param is explicitly set by user.
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classmethod
load
(path)¶ Reads an ML instance from the input path, a shortcut of read().load(path).
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predictProbability
(value)[source]¶ Predict probability for the given features.
New in version 3.0.0.
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classmethod
read
()¶ Returns an MLReader instance for this class.
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save
(path)¶ Save this ML instance to the given path, a shortcut of ‘write().save(path)’.
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set
(param, value)¶ Sets a parameter in the embedded param map.
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setFeaturesCol
(value)[source]¶ Sets the value of
featuresCol
.New in version 3.0.0.
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setPredictionCol
(value)[source]¶ Sets the value of
predictionCol
.New in version 3.0.0.
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setProbabilityCol
(value)[source]¶ Sets the value of
probabilityCol
.New in version 3.0.0.
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transform
(dataset, params=None)¶ Transforms the input dataset with optional parameters.
- Parameters
dataset – input dataset, which is an instance of
pyspark.sql.DataFrame
params – an optional param map that overrides embedded params.
- Returns
transformed dataset
New in version 1.3.0.
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write
()¶ Returns an MLWriter instance for this ML instance.
Attributes Documentation
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aggregationDepth
= Param(parent='undefined', name='aggregationDepth', doc='suggested depth for treeAggregate (>= 2).')¶
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featuresCol
= Param(parent='undefined', name='featuresCol', doc='features column name.')¶
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gaussians
¶ Array of
MultivariateGaussian
where gaussians[i] represents the Multivariate Gaussian (Normal) Distribution for Gaussian iNew in version 3.0.0.
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gaussiansDF
¶ Retrieve Gaussian distributions as a DataFrame. Each row represents a Gaussian Distribution. The DataFrame has two columns: mean (Vector) and cov (Matrix).
New in version 2.0.0.
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hasSummary
¶ Indicates whether a training summary exists for this model instance.
New in version 2.1.0.
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k
= Param(parent='undefined', name='k', doc='Number of independent Gaussians in the mixture model. Must be > 1.')¶
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maxIter
= Param(parent='undefined', name='maxIter', doc='max number of iterations (>= 0).')¶
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params
¶ Returns all params ordered by name. The default implementation uses
dir()
to get all attributes of typeParam
.
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predictionCol
= Param(parent='undefined', name='predictionCol', doc='prediction column name.')¶
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probabilityCol
= Param(parent='undefined', name='probabilityCol', doc='Column name for predicted class conditional probabilities. Note: Not all models output well-calibrated probability estimates! These probabilities should be treated as confidences, not precise probabilities.')¶
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seed
= Param(parent='undefined', name='seed', doc='random seed.')¶
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summary
¶ Gets summary (e.g. cluster assignments, cluster sizes) of the model trained on the training set. An exception is thrown if no summary exists.
New in version 2.1.0.
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tol
= Param(parent='undefined', name='tol', doc='the convergence tolerance for iterative algorithms (>= 0).')¶
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weightCol
= Param(parent='undefined', name='weightCol', doc='weight column name. If this is not set or empty, we treat all instance weights as 1.0.')¶
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weights
¶ Weight for each Gaussian distribution in the mixture. This is a multinomial probability distribution over the k Gaussians, where weights[i] is the weight for Gaussian i, and weights sum to 1.
New in version 2.0.0.
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