Merge remote-tracking branch 'github_ml/master' into develop

summit/multiview_platform/monoview_classifiers/scm.py

+from pyscm.scm import SetCoveringMachineClassifier as scm
+
+import numpy as np
+
+from ..monoview.monoview_utils import BaseMonoviewClassifier
+from ..utils.hyper_parameter_search import CustomRandint, CustomUniform
+
+
+# Author-Info
+__author__ = "Baptiste Bauvin"
+__status__ = "Prototype"  # Production, Development, Prototype
+
+
+# class Decis
+classifier_class_name = "SCM"
+
+class SCM(scm, BaseMonoviewClassifier):
+    """
+    SCM  Classifier
+    Parameters
+    ----------
+    random_state (default : None)
+    model_type : string (default: "conjunction")
+    max_rules : int number maximum of rules (default : 10)
+    p : float value(default : 0.1 )
+
+    kwarg : others arguments
+
+    Attributes
+    ----------
+    param_names
+
+    distribs
+
+    classed_params
+
+    weird_strings
+
+    """
+
+    def __init__(self, random_state=None, model_type="conjunction",
+                 max_rules=10, p=0.1, **kwargs):
+        """
+
+        Parameters
+        ----------
+        random_state
+        model_type
+        max_rules
+        p
+        kwargs
+        """
+        super(SCM, self).__init__(
+            random_state=random_state,
+            model_type=model_type,
+            max_rules=max_rules,
+            p=p
+        )
+        self.param_names = ["model_type", "max_rules", "p", "random_state"]
+        self.distribs = [["conjunction", "disjunction"],
+                         CustomRandint(low=1, high=15),
+                         CustomUniform(loc=0, state=1), [random_state]]
+        self.classed_params = []
+        self.weird_strings = {}
+
+    def fit(self, X, y, tiebreaker=None, iteration_callback=None, **fit_params):
+        self.n_features = X.shape[1]
+        scm.fit(self, X, y, tiebreaker=None, iteration_callback=None, **fit_params)
+        self.feature_importances_ = np.zeros(self.n_features)
+        # sum the rules importances :
+        # rules_importances = estim.get_rules_importances() #activate it when pyscm will implement importance
+        rules_importances = np.ones(len(
+            self.model_.rules))  # delete it when pyscm will implement importance
+        for rule, importance in zip(self.model_.rules, rules_importances):
+            self.feature_importances_[rule.feature_idx] += importance
+        self.feature_importances_ /= np.sum(self.feature_importances_)
+        return self
+
+    # def canProbas(self):
+    #     """
+    #     Used to know if the classifier can return label probabilities
+    #
+    #     Returns
+    #     -------
+    #     return False in any case
+    #     """
+    #     return False
+
+    def get_interpretation(self, directory, base_file_name, y_test, feature_ids,
+                           multi_class=False):
+        interpret_string = self.get_feature_importance(directory,
+                                                       base_file_name,
+                                                       feature_ids)
+        interpret_string += "Model used : " + str(self.model_)
+        return interpret_string
+
+
+
+def paramsToSet(nIter, random_state):
+    paramsSet = []
+    for _ in range(nIter):
+        paramsSet.append(
+            {"model_type": random_state.choice(["conjunction", "disjunction"]),
+             "max_rules": random_state.randint(1, 15),
+             "p": random_state.random_sample()})
+    return paramsSet