Python NFoldPartitioner.generate方法代码示例

# 需要导入模块: from mvpa2.generators.partition import NFoldPartitioner [as 别名]
# 或者: from mvpa2.generators.partition.NFoldPartitioner import generate [as 别名]
def blocked_detection_n_equals_1(mech_vec_list, mech_nm_list):
    data, _ = mar.create_blocked_dataset_semantic_classes(mech_vec_list, mech_nm_list, append_robot = False)
    nfs = NFoldPartitioner(cvtype=1, attr='targets') # 1-fold ?
    spl = splitters.Splitter(attr='partitions')
    splits = [list(spl.generate(x)) for x in nfs.generate(data)]
    
    ## splitter = NFoldSplitter(cvtype=1)
    ## label_splitter = NFoldSplitter(cvtype=1, attr='labels')
    mean_thresh_known_mech_dict = {}
    for l_wdata, l_vdata in splits:
        mean_thresh_known_mech_list = []
        Ms = mar.compute_Ms(data, l_vdata.targets[0], plot=True)
        break

        mechs = l_vdata.uniquechunks
        for m in mechs:
            n_std = 0.
            all_trials = l_vdata.samples[np.where(l_vdata.chunks == m)]
            le = all_trials.shape[1]
            for i in range(all_trials.shape[0]):
                one_trial = all_trials[i,:].reshape(1,le)
                mn_list, std_list = mar.estimate_theta(one_trial, Ms, plot=False)
                mn_arr, std_arr = np.array(mn_list), np.array(std_list)
                n_std = max(n_std, np.max(np.abs(all_trials - mn_arr) / std_arr))

            mean_thresh_known_mech_dict[m] = (Ms, n_std) # store on a per mechanism granularity
            print 'n_std for', m, ':', n_std
            print 'max error force for', m, ':', np.max(n_std*std_arr[2:])

# 需要导入模块: from mvpa2.generators.partition import NFoldPartitioner [as 别名]
# 或者: from mvpa2.generators.partition.NFoldPartitioner import generate [as 别名]
    def test_slicing(self):
        hs = HalfPartitioner()
        spl = Splitter(attr="partitions")
        splits = list(hs.generate(self.data))
        for s in splits:
            # partitioned dataset shared the data
            assert_true(s.samples.base is self.data.samples)
        splits = [list(spl.generate(p)) for p in hs.generate(self.data)]

        # with numpy 1.7.0b1 "chaining" was deprecated so let's create
        # check function appropriate for the given numpy version
        _a = np.arange(5)
        __a = _a[:4][:3]
        if __a.base is _a:
            # 1.7.0b1
            def is_the_same_base(x, base=self.data.samples):
                return x.base is base

        elif __a.base.base is _a:
            # prior 1.7.0b1
            def is_the_same_base(x, base=self.data.samples):
                return x.base.base is base

        else:
            raise RuntimeError("Uknown handling of .base by numpy")

        for s in splits:
            # we get slicing all the time
            assert_true(is_the_same_base(s[0].samples))
            assert_true(is_the_same_base(s[1].samples))
        spl = Splitter(attr="partitions", noslicing=True)
        splits = [list(spl.generate(p)) for p in hs.generate(self.data)]
        for s in splits:
            # we no slicing at all
            assert_false(s[0].samples.base is self.data.samples)
            assert_false(s[1].samples.base is self.data.samples)
        nfs = NFoldPartitioner()
        spl = Splitter(attr="partitions")
        splits = [list(spl.generate(p)) for p in nfs.generate(self.data)]
        for i, s in enumerate(splits):
            # training only first and last split
            if i == 0 or i == len(splits) - 1:
                assert_true(is_the_same_base(s[0].samples))
            else:
                assert_true(s[0].samples.base is None)
            # we get slicing all the time
            assert_true(is_the_same_base(s[1].samples))
        step_ds = Dataset(np.random.randn(20, 2), sa={"chunks": np.tile([0, 1], 10)})
        oes = OddEvenPartitioner()
        spl = Splitter(attr="partitions")
        splits = list(oes.generate(step_ds))
        for s in splits:
            # partitioned dataset shared the data
            assert_true(s.samples.base is step_ds.samples)
        splits = [list(spl.generate(p)) for p in oes.generate(step_ds)]
        assert_equal(len(splits), 2)
        for s in splits:
            # we get slicing all the time
            assert_true(is_the_same_base(s[0].samples, step_ds.samples))
            assert_true(is_the_same_base(s[1].samples, step_ds.samples))

# 需要导入模块: from mvpa2.generators.partition import NFoldPartitioner [as 别名]
# 或者: from mvpa2.generators.partition.NFoldPartitioner import generate [as 别名]
    def test_simplest_cv_pat_gen(self):
        # create the generator
        nfs = NFoldPartitioner(cvtype=1)
        spl = Splitter(attr='partitions')
        # now get the xval pattern sets One-Fold CV)
        xvpat = [ list(spl.generate(p)) for p in nfs.generate(self.data) ]

        self.failUnless( len(xvpat) == 10 )

        for i,p in enumerate(xvpat):
            self.failUnless( len(p) == 2 )
            self.failUnless( p[0].nsamples == 90 )
            self.failUnless( p[1].nsamples == 10 )
            self.failUnless( p[1].chunks[0] == i )

# 需要导入模块: from mvpa2.generators.partition import NFoldPartitioner [as 别名]
# 或者: from mvpa2.generators.partition.NFoldPartitioner import generate [as 别名]
    def test_counted_splitting(self):
        spl = Splitter(attr='partitions')
        # count > #chunks, should result in 10 splits
        nchunks = len(self.data.sa['chunks'].unique)
        for strategy in Partitioner._STRATEGIES:
            for count, target in [ (nchunks*2, nchunks),
                                   (nchunks, nchunks),
                                   (nchunks-1, nchunks-1),
                                   (3, 3),
                                   (0, 0),
                                   (1, 1)
                                   ]:
                nfs = NFoldPartitioner(cvtype=1, count=count,
                                       selection_strategy=strategy)
                splits = [ list(spl.generate(p)) for p in nfs.generate(self.data) ]
                self.failUnless(len(splits) == target)
                chosenchunks = [int(s[1].uniquechunks) for s in splits]

                # Test if configuration matches as well
                nsplits_cfg = len(nfs.get_partition_specs(self.data))
                self.failUnlessEqual(nsplits_cfg, target)

                # Check if "lastsplit" dsattr was assigned appropriately
                nsplits = len(splits)
                if nsplits > 0:
                    # dummy-proof testing of last split
                    for ds_ in splits[-1]:
                        self.failUnless(ds_.a.lastpartitionset)
                    # test all now
                    for isplit,split in enumerate(splits):
                        for ds_ in split:
                            ds_.a.lastpartitionset == isplit==nsplits-1

                # Check results of different strategies
                if strategy == 'first':
                    self.failUnlessEqual(chosenchunks, range(target))
                elif strategy == 'equidistant':
                    if target == 3:
                        self.failUnlessEqual(chosenchunks, [0, 3, 7])
                elif strategy == 'random':
                    # none is selected twice
                    self.failUnless(len(set(chosenchunks)) == len(chosenchunks))
                    self.failUnless(target == len(chosenchunks))
                else:
                    raise RuntimeError, "Add unittest for strategy %s" \
                          % strategy

# 需要导入模块: from mvpa2.generators.partition import NFoldPartitioner [as 别名]
# 或者: from mvpa2.generators.partition.NFoldPartitioner import generate [as 别名]
 def test_slicing(self):
     hs = HalfPartitioner()
     spl = Splitter(attr='partitions')
     splits = list(hs.generate(self.data))
     for s in splits:
         # partitioned dataset shared the data
         assert_true(s.samples.base is self.data.samples)
     splits = [ list(spl.generate(p)) for p in hs.generate(self.data) ]
     for s in splits:
         # we get slicing all the time
         assert_true(s[0].samples.base.base is self.data.samples)
         assert_true(s[1].samples.base.base is self.data.samples)
     spl = Splitter(attr='partitions', noslicing=True)
     splits = [ list(spl.generate(p)) for p in hs.generate(self.data) ]
     for s in splits:
         # we no slicing at all
         assert_false(s[0].samples.base is self.data.samples)
         assert_false(s[1].samples.base is self.data.samples)
     nfs = NFoldPartitioner()
     spl = Splitter(attr='partitions')
     splits = [ list(spl.generate(p)) for p in nfs.generate(self.data) ]
     for i, s in enumerate(splits):
         # training only first and last split
         if i == 0 or i == len(splits) - 1:
             assert_true(s[0].samples.base.base is self.data.samples)
         else:
             assert_true(s[0].samples.base is None)
         # we get slicing all the time
         assert_true(s[1].samples.base.base is self.data.samples)
     step_ds = Dataset(np.random.randn(20,2),
                       sa={'chunks': np.tile([0,1], 10)})
     oes = OddEvenPartitioner()
     spl = Splitter(attr='partitions')
     splits = list(oes.generate(step_ds))
     for s in splits:
         # partitioned dataset shared the data
         assert_true(s.samples.base is step_ds.samples)
     splits = [ list(spl.generate(p)) for p in oes.generate(step_ds) ]
     assert_equal(len(splits), 2)
     for s in splits:
         # we get slicing all the time
         assert_true(s[0].samples.base.base is step_ds.samples)
         assert_true(s[1].samples.base.base is step_ds.samples)

# 需要导入模块: from mvpa2.generators.partition import NFoldPartitioner [as 别名]
# 或者: from mvpa2.generators.partition.NFoldPartitioner import generate [as 别名]
    def _test_gideon_weird_case(self):
        """'The utter collapse' -- communicated by Peter J. Kohler

        Desire to collapse all samples per each category in training
        and testing sets, thus resulting only in a single
        sample/category per training and per testing.  As it is now,
        CrossValidation on MappedClassifier would not work

        observations: chance distribution obviously gets wide, but
        also gets skewed to anti-learning on nfolds like 4.
        
        """
        from mvpa2.mappers.fx import mean_group_sample
        from mvpa2.clfs.knn import kNN
        clf = kNN()
        print "HERE"
        ds = datasets['uni2large'].copy()
        ds = ds[ds.sa.chunks < 9]
        accs = []
        for i in xrange(10):          # # of random samples
            ds.samples = np.random.randn(*ds.shape)
            if False: # this would have been a native way IF we allowed change of number of samples
                clf2 = MappedClassifier(clf=kNN(), #clf,
                                        mapper=mean_group_sample(['targets', 'partitions']))
                cv = CrossValidation(clf2, NFoldPartitioner(4), postproc=None,
                                     enable_ca=['stats'])
                print cv(ds)
            else:
                from mvpa2.clfs.transerror import ConfusionMatrix
                partitioner = NFoldPartitioner(6)
                meaner = mean_group_sample(['targets', 'partitions'])
                cm = ConfusionMatrix()
                te = TransferMeasure(clf, Splitter('partitions'),
                                     postproc=BinaryFxNode(mean_mismatch_error,
                                                           'targets'),
                                     enable_ca = ['stats']
                                     )
                for part in partitioner.generate(ds):
                    ds_meaned = meaner(part)
                    error = np.asscalar(te(ds_meaned))
                    cm += te.ca.stats
                print i, cm.stats['ACC']
                accs.append(cm.stats['ACC'])

# 需要导入模块: from mvpa2.generators.partition import NFoldPartitioner [as 别名]
# 或者: from mvpa2.generators.partition.NFoldPartitioner import generate [as 别名]
    def test_gideon_weird_case(self):
        """Test if MappedClassifier could handle a mapper altering number of samples

        'The utter collapse' -- communicated by Peter J. Kohler

        Desire to collapse all samples per each category in training
        and testing sets, thus resulting only in a single
        sample/category per training and per testing.

        It is a peculiar scenario which pin points the problem that so
        far mappers assumed not to change number of samples
        """
        from mvpa2.mappers.fx import mean_group_sample
        from mvpa2.clfs.knn import kNN
        from mvpa2.mappers.base import ChainMapper
        ds = datasets['uni2large'].copy()
        #ds = ds[ds.sa.chunks < 9]
        accs = []
        k = 1                           # for kNN
        nf = 1                          # for NFoldPartitioner
        for i in xrange(1):          # # of random runs
            ds.samples = np.random.randn(*ds.shape)
            #
            # There are 3 ways to accomplish needed goal
            #

            # 0. Hard way: overcome the problem by manually
            #    pre-splitting/meaning in a loop
            from mvpa2.clfs.transerror import ConfusionMatrix
            partitioner = NFoldPartitioner(nf)
            meaner = mean_group_sample(['targets', 'partitions'])
            cm = ConfusionMatrix()
            te = TransferMeasure(kNN(k), Splitter('partitions'),
                                 postproc=BinaryFxNode(mean_mismatch_error,
                                                       'targets'),
                                 enable_ca = ['stats']
                                 )
            errors = []
            for part in partitioner.generate(ds):
                ds_meaned = meaner(part)
                errors.append(np.asscalar(te(ds_meaned)))
                cm += te.ca.stats
            #print i, cm.stats['ACC']
            accs.append(cm.stats['ACC'])


            if False: # not yet working -- see _tent/allow_ch_nsamples
                      # branch for attempt to make it work
                # 1. This is a "native way" IF we allow change of number
                #    of samples via _call to be done by MappedClassifier
                #    while operating solely on the mapped dataset
                clf2 = MappedClassifier(clf=kNN(k), #clf,
                                        mapper=mean_group_sample(['targets', 'partitions']))
                cv = CrossValidation(clf2, NFoldPartitioner(nf), postproc=None,
                                     enable_ca=['stats'])
                # meaning all should be ok since we should have ballanced
                # sets across all chunks here
                errors_native = cv(ds)

                self.assertEqual(np.max(np.abs(errors_native.samples[:,0] - errors)),
                                 0)

            # 2. Work without fixes to MappedClassifier allowing
            #    change of # of samples
            #
            # CrossValidation will operate on a chain mapper which
            # would perform necessary meaning first before dealing with
            # kNN cons: .stats would not be exposed since ChainMapper
            # doesn't expose them from ChainMapper (yet)
            if __debug__ and 'ENFORCE_CA_ENABLED' in debug.active:
                raise SkipTest("Known to fail while trying to enable "
                               "training_stats for the ChainMapper")
            cv2 = CrossValidation(ChainMapper([mean_group_sample(['targets', 'partitions']),
                                               kNN(k)],
                                              space='targets'),
                                  NFoldPartitioner(nf),
                                  postproc=None)
            errors_native2 = cv2(ds)

            self.assertEqual(np.max(np.abs(errors_native2.samples[:,0] - errors)),
                             0)

            # All of the ways should provide the same results
            #print i, np.max(np.abs(errors_native.samples[:,0] - errors)), \
            #      np.max(np.abs(errors_native2.samples[:,0] - errors))

        if False: # just to investigate the distribution if we have enough iterations
            import pylab as pl
            uaccs = np.unique(accs)
            step = np.asscalar(np.unique(np.round(uaccs[1:] - uaccs[:-1], 4)))
            bins = np.linspace(0., 1., np.round(1./step+1))
            xx = pl.hist(accs, bins=bins, align='left')
            pl.xlim((0. - step/2, 1.+step/2))

# 需要导入模块: from mvpa2.generators.partition import NFoldPartitioner [as 别名]
# 或者: from mvpa2.generators.partition.NFoldPartitioner import generate [as 别名]
    def test_analyzer_with_split_classifier(self, clfds):
        """Test analyzers in split classifier
        """
        clf, ds = clfds             # unroll the tuple
        # We need to skip some LARSes here
        _sclf = str(clf)
        if 'LARS(' in _sclf and "type='stepwise'" in _sclf:
            # ADD KnownToFail thingie from NiPy
            return

        # To don't waste too much time testing lets limit to 3 splits
        nsplits = 3
        partitioner = NFoldPartitioner(count=nsplits)
        mclf = SplitClassifier(clf=clf,
                               partitioner=partitioner,
                               enable_ca=['training_stats',
                                              'stats'])
        sana = mclf.get_sensitivity_analyzer(# postproc=absolute_features(),
                                           pass_attr=['fa.nonbogus_targets'],
                                           enable_ca=["sensitivities"])

        ulabels = ds.uniquetargets
        nlabels = len(ulabels)
        # Can't rely on splitcfg since count-limit is done in __call__
        assert(nsplits == len(list(partitioner.generate(ds))))
        sens = sana(ds)
        assert('nonbogus_targets' in sens.fa) # were they passsed?
        # TODO: those few do not expose biases
        if not len(set(clf.__tags__).intersection(('lars', 'glmnet', 'gpr'))):
            assert('biases' in sens.sa)
            # print sens.sa.biases
        # It should return either ...
        #  nlabels * nsplits
        req_nsamples = [ nlabels * nsplits ]
        if nlabels == 2:
            # A single sensitivity in case of binary
            req_nsamples += [ nsplits ]
        else:
            # and for pairs in case of multiclass
            req_nsamples += [ (nlabels * (nlabels - 1) / 2) * nsplits ]
            # and for 1-vs-1 embedded within Multiclass operating on
            # pairs (e.g. SMLR)
            req_nsamples += [req_nsamples[-1] * 2]

            # Also for regression_based -- they can do multiclass
            # but only 1 sensitivity is provided
            if 'regression_based' in clf.__tags__:
                req_nsamples += [ nsplits ]

        # # of features should correspond
        self.assertEqual(sens.shape[1], ds.nfeatures)
        # # of samples/sensitivities should also be reasonable
        self.assertTrue(sens.shape[0] in req_nsamples)

        # Check if labels are present
        self.assertTrue('splits' in sens.sa)
        self.assertTrue('targets' in sens.sa)
        # should be 1D -- otherwise dtype object
        self.assertTrue(sens.sa.targets.ndim == 1)

        sens_ulabels = sens.sa['targets'].unique
        # Some labels might be pairs(tuples) so ndarray would be of
        # dtype object and we would need to get them all
        if sens_ulabels.dtype is np.dtype('object'):
            sens_ulabels = np.unique(
                reduce(lambda x, y: x + y, [list(x) for x in sens_ulabels]))

        assert_array_equal(sens_ulabels, ds.sa['targets'].unique)

        errors = [x.percent_correct
                    for x in sana.clf.ca.stats.matrices]

        # lets go through all sensitivities and see if we selected the right
        # features
        #if 'meta' in clf.__tags__ and len(sens.samples[0].nonzero()[0])<2:
        if '5%' in clf.descr \
               or (nlabels > 2 and 'regression_based' in clf.__tags__):
            # Some meta classifiers (5% of ANOVA) are too harsh ;-)
            # if we get less than 2 features with on-zero sensitivities we
            # cannot really test
            # Also -- regression based classifiers performance for multiclass
            # is expected to suck in general
            return

        if cfg.getboolean('tests', 'labile', default='yes'):
            for conf_matrix in [sana.clf.ca.training_stats] \
                              + sana.clf.ca.stats.matrices:
                self.assertTrue(
                    conf_matrix.percent_correct >= 70,
                    msg="We must have trained on each one more or " \
                    "less correctly. Got %f%% correct on %d labels" %
                    (conf_matrix.percent_correct,
                     nlabels))


        # Since  now we have per split and possibly per label -- lets just find
        # mean per each feature per label across splits
        sensm = FxMapper('samples', lambda x: np.sum(x),
                         uattrs=['targets']).forward(sens)
        sensgm = maxofabs_sample().forward(sensm)    # global max of abs of means
#.........这里部分代码省略.........

# 需要导入模块: from mvpa2.generators.partition import NFoldPartitioner [as 别名]
# 或者: from mvpa2.generators.partition.NFoldPartitioner import generate [as 别名]
def test_factorialpartitioner():
    # Test against sifter and chainmap implemented in test_usecases
    # -- code below copied from test_usecases --
    # Let's simulate the beast -- 6 categories total groupped into 3
    # super-ordinate, and actually without any 'superordinate' effect
    # since subordinate categories independent
    ds = normal_feature_dataset(
        nlabels=6, snr=100, perlabel=30, nfeatures=6, nonbogus_features=range(6), nchunks=5  # pure signal! ;)
    )
    ds.sa["subord"] = ds.sa.targets.copy()
    ds.sa["superord"] = ["super%d" % (int(i[1]) % 3,) for i in ds.targets]  # 3 superord categories
    # let's override original targets just to be sure that we aren't relying on them
    ds.targets[:] = 0

    # let's make two other datasets to test later
    # one superordinate category only
    ds_1super = ds.copy()
    ds_1super.sa["superord"] = ["super1" for i in ds_1super.targets]

    # one superordinate category has only one subordinate
    # ds_unbalanced = ds.copy()
    # nsuper1 = np.sum(ds_unbalanced.sa.superord == 'super1')
    # mask_superord = ds_unbalanced.sa.superord == 'super1'
    # uniq_subord = np.unique(ds_unbalanced.sa.subord[mask_superord])
    # ds_unbalanced.sa.subord[mask_superord] = [uniq_subord[0] for i in range(nsuper1)]
    ds_unbalanced = Dataset(range(4), sa={"subord": [0, 0, 1, 2], "superord": [1, 1, 2, 2]})

    npart = ChainNode(
        [
            ## so we split based on superord
            NFoldPartitioner(len(ds.sa["superord"].unique), attr="subord"),
            ## so it should select only those splits where we took 1 from
            ## each of the superord categories leaving things in balance
            Sifter([("partitions", 2), ("superord", {"uvalues": ds.sa["superord"].unique, "balanced": True})]),
        ],
        space="partitions",
    )

    # now the new implementation
    factpart = FactorialPartitioner(NFoldPartitioner(attr="subord"), attr="superord")

    partitions_npart = [p.sa.partitions for p in npart.generate(ds)]
    partitions_factpart = [p.sa.partitions for p in factpart.generate(ds)]

    assert_array_equal(np.sort(partitions_npart), np.sort(partitions_factpart))

    # now let's check it behaves correctly if we have only one superord class
    nfold = NFoldPartitioner(attr="subord")
    partitions_nfold = [p.sa.partitions for p in nfold.generate(ds_1super)]
    partitions_factpart = [p.sa.partitions for p in factpart.generate(ds_1super)]
    assert_array_equal(np.sort(partitions_nfold), np.sort(partitions_factpart))

    # smoke test for unbalanced subord classes
    warning_msg = (
        "One or more superordinate attributes do not have the same "
        "number of subordinate attributes. This could yield to "
        "unbalanced partitions."
    )
    with assert_warnings([(RuntimeWarning, warning_msg)]):
        partitions_factpart = [p.sa.partitions for p in factpart.generate(ds_unbalanced)]

    partitions_unbalanced = [np.array([2, 2, 2, 1]), np.array([2, 2, 1, 2])]
    superord_unbalanced = [([2], [1, 1, 2]), ([2], [1, 1, 2])]
    subord_unbalanced = [([2], [0, 0, 1]), ([1], [0, 0, 2])]

    for out_part, true_part, super_out, sub_out in zip(
        partitions_factpart, partitions_unbalanced, superord_unbalanced, subord_unbalanced
    ):
        assert_array_equal(out_part, true_part)
        assert_array_equal(
            (ds_unbalanced[out_part == 1].sa.superord.tolist(), ds_unbalanced[out_part == 2].sa.superord.tolist()),
            super_out,
        )
        assert_array_equal(
            (ds_unbalanced[out_part == 1].sa.subord.tolist(), ds_unbalanced[out_part == 2].sa.subord.tolist()), sub_out
        )

    # now let's test on a dummy dataset
    ds_dummy = Dataset(range(4), sa={"subord": range(4), "superord": [1, 2] * 2})
    partitions_factpart = [p.sa.partitions for p in factpart.generate(ds_dummy)]
    assert_array_equal(partitions_factpart, [[2, 2, 1, 1], [2, 1, 1, 2], [1, 2, 2, 1], [1, 1, 2, 2]])

# 需要导入模块: from mvpa2.generators.partition import NFoldPartitioner [as 别名]
# 或者: from mvpa2.generators.partition.NFoldPartitioner import generate [as 别名]
def generate_roc_curve(mech_vec_list, mech_nm_list,
                       semantic_range = np.arange(0.2, 2.7, 0.3),
                       mech_range = np.arange(0.2, 6.5, 0.7),
                       n_prev_trials = 1, prev_c = 'r',
                       plot_prev=True, sem_c = 'b', sem_m = '+',
                       plot_semantic=True, semantic_label='operating 1st time and \n known mechanism class'):

    t_nm_list, t_mech_vec_list = [], []
    for i, nm in enumerate(mech_nm_list):
        ## print 'nm:', nm
        if 'known' in nm:
            continue
        t_nm_list.append(nm)
        t_mech_vec_list.append(mech_vec_list[i])

    data, _ = mar.create_blocked_dataset_semantic_classes(t_mech_vec_list, t_nm_list, append_robot = False)
    
    ## label_splitter = NFoldSplitter(cvtype=1, attr='labels')
    thresh_dict = ut.load_pickle('blocked_thresh_dict.pkl') # human + robot data
    mean_charlie_dict = thresh_dict['mean_charlie']
    mean_known_mech_dict = thresh_dict['mean_known_mech']

    #---------------- semantic class prior -------------
    if plot_semantic:
        fp_l_l = []
        mn_l_l = []
        err_l_l = []
        mech_fp_l_l = []
        mech_mn_l_l = []
        mech_err_l_l = []

        nfs = NFoldPartitioner(cvtype=1, attr='targets') # 1-fold ?
        label_splitter = splitters.Splitter(attr='partitions')            
        splits = [list(label_splitter.generate(x)) for x in nfs.generate(data)]            

        # Grouping by labels
        for l_wdata, l_vdata in splits: #label_splitter(data):

            print "Number of data: ", len(l_vdata.chunks)
        
            # Why zero??? Do we want specific chunk?  -> changed into 10
            lab = l_vdata.targets[0] # all same label
            chunk = l_vdata.chunks[0] # chunk should be independant!!
            trials = l_vdata.samples 

            if lab == 'Refrigerator':
                lab = 'Fridge'

            ## tot_mean = None
            ## tot_std  = None
            ## for chunk in l_vdata.chunks:
            ##     _, mean, std =  mean_charlie_dict[chunk] # mean except the specified chunk in same class
            ##     if tot_mean is None:
            ##         tot_mean = mean
            ##         tot_std  = std
            ##     else:
            ##         tot_mean += mean
            ##         tot_std += std

            ##     print chunk, mean[0], tot_mean[0]

            ## mean = tot_mean/float(len(l_vdata.chunks))
            ## std = tot_std/float(len(l_vdata.chunks))
            ## print mean[0], tot_mean[0], float(len(l_vdata.chunks))
            ## sys.exit()
            
            # Select evaluation chunk for the ROC ? 
            ## _, mean, std =  mean_charlie_dict[lab]
            _, mean, std =  mean_charlie_dict[chunk]

            # cutting into the same length
            min_len = min(len(mean), trials.shape[1])
            trials = trials[:,:min_len]
            mean = mean[:min_len]
            std = std[:min_len] #???

            mn_list = []
            fp_list, err_list = [], []
            for n in semantic_range:
                err = (mean + n*std) - trials                    
                #false_pos = np.sum(np.any(err<0, 1))
                #tot = trials.shape[0]
                false_pos = np.sum(err<0) # Count false cases
                tot = trials.shape[0] * trials.shape[1]
                fp_list.append(false_pos/(tot*0.01))
                err = err[np.where(err>0)] 
                err_list.append(err.flatten())
                mn_list.append(np.mean(err))
            err_l_l.append(err_list)
            fp_l_l.append(fp_list)
            mn_l_l.append(mn_list)

        
            
        ll = [[] for i in err_l_l[0]]  # why 0?
        for i,e in enumerate(err_l_l): # labels
            for j,l in enumerate(ll):  # multiplier range
                l.append(e[j])

        std_list = []
#.........这里部分代码省略.........