Exemple #1
0
def create_component_model(column_metadata, column_hypers, suffstats):
    modeltype = column_metadata['modeltype']
    if modeltype == 'normal_inverse_gamma':
        component_model = CCM.p_ContinuousComponentModel(
            column_hypers,
            count=suffstats.get(b'N', 0),
            sum_x=suffstats.get(b'sum_x', None),
            sum_x_squared=suffstats.get(b'sum_x_squared', None))
    elif modeltype == 'symmetric_dirichlet_discrete':
        # TODO Can we change the suffstats data structure not to
        # include the total count in the dictionary of per-item
        # counts, please?
        suffstats = copy.copy(suffstats)
        count = suffstats.pop(b'N', 0)
        component_model = MCM.p_MultinomialComponentModel(column_hypers,
                                                          count=count,
                                                          counts=suffstats)
    elif modeltype == 'vonmises':
        component_model = CYCM.p_CyclicComponentModel(
            column_hypers,
            count=suffstats.get(b'N', 0),
            sum_sin_x=suffstats.get(b'sum_sin_x', None),
            sum_cos_x=suffstats.get(b'sum_cos_x', None))
    else:
        raise ValueError('unknown modeltype: %r' % (modeltype, ))
    return component_model
Exemple #2
0
def create_component_model(column_metadata, column_hypers, suffstats):
    modeltype = column_metadata['modeltype']
    if modeltype == 'normal_inverse_gamma':
        component_model = CCM.p_ContinuousComponentModel(
            column_hypers,
            count=suffstats.get(b'N', 0),
            sum_x=suffstats.get(b'sum_x', None),
            sum_x_squared=suffstats.get(b'sum_x_squared', None))
    elif modeltype == 'symmetric_dirichlet_discrete':
        # TODO Can we change the suffstats data structure not to
        # include the total count in the dictionary of per-item
        # counts, please?
        suffstats = copy.copy(suffstats)
        count = suffstats.pop(b'N', 0)
        component_model = MCM.p_MultinomialComponentModel(
            column_hypers, count=count, counts=suffstats)
    elif modeltype == 'vonmises':
        component_model = CYCM.p_CyclicComponentModel(
            column_hypers,
            count=suffstats.get(b'N', 0),
            sum_sin_x=suffstats.get(b'sum_sin_x', None),
            sum_cos_x=suffstats.get(b'sum_cos_x', None))
    else:
        raise ValueError('unknown modeltype: %r' % (modeltype,))
    return component_model
Exemple #3
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def plot(results, filename=None):
    n_samples = results['config']['n_samples']
    samples = sorted(results['samples'])
    conf = results['conf']
    X_L = results['X_L_list'][0]
    X_D = results['X_D_list'][0]

    hgrm, _ = np.histogram(X_D[0], len(set(X_D[0])))
    max_mass_mode = np.argmax(hgrm)
    suffstats = X_L['view_state'][0]['column_component_suffstats'][0][max_mass_mode]

    counts = suffstats['N']
    sum_x = suffstats['sum_x']
    sum_x_sq = suffstats['sum_x_squared']
    scale = counts/results['config']['n_samples']
    component_model = ccm.p_ContinuousComponentModel(
        X_L['column_hypers'][0], counts, sum_x, sum_x_sq)

    plt.figure(facecolor='white')

    ax = plt.subplot(1, 2, 1)
    ax.hist(samples, min(31, int(n_samples/10)), normed=True, label='Samples',
            ec='none', fc='gray')
    T = [[x] for x in samples]
    M_c = du.gen_M_c_from_T(T, cctypes=['continuous'])

    xvals = np.linspace(np.min(samples), np.max(samples), 300)
    Q = [(n_samples, 0, x) for i, x in enumerate(xvals)]
    p = [su.simple_predictive_probability(M_c, X_L, X_D, [], [q]) for q in Q]
    p = np.array(p)
    ax.plot(xvals, np.exp(p), c='#bbbbbb',
            label='Predicitive probability', lw=3)
    p = [component_model.calc_element_predictive_logp(x) for x in xvals]
    ax.plot(xvals, np.exp(p)*scale, c='#222222', label='Summary mode',
            lw=3)
    plt.xlabel('Samples')
    plt.legend(loc=0)

    ax = plt.subplot(1, 2, 2)
    ax.bar([0, 1], [conf, 1.0-conf], fc='#333333', ec='none')
    ax.set_ylim([0, 1])
    ax.set_xlim([-.25, 2])
    ax.set_xticks([.5, 1.5])
    plt.ylabel('Probability mass')
    ax.set_xticklabels(['Summary mode', 'All other modes'])

    if filename is None:
        plt.show()
    else:
        plt.savefig(filename)
Exemple #4
0
#       http://www.apache.org/licenses/LICENSE-2.0
#
#   Unless required by applicable law or agreed to in writing, software
#   distributed under the License is distributed on an "AS IS" BASIS,
#   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
#   See the License for the specific language governing permissions and
#   limitations under the License.
#
from __future__ import print_function
import numpy
import crosscat.cython_code.ContinuousComponentModel as CCM
import crosscat.cython_code.MultinomialComponentModel as MCM
import crosscat.cython_code.State as State

c_hypers = dict(r=10, nu=10, s=10, mu=10)
ccm = CCM.p_ContinuousComponentModel(c_hypers)
print("empty component model")
print(ccm)
#
for element in [numpy.nan, 0, 1, numpy.nan, 2]:
    print()
    ccm.insert_element(element)
    print("inserted %s" % element)
    print(ccm)

m_hypers = dict(dirichlet_alpha=10, K=3)
mcm = MCM.p_MultinomialComponentModel(m_hypers)
print("empty component model")
print(mcm)

for element in [numpy.nan, 0, 1, numpy.nan, 2]:
#
#       http://www.apache.org/licenses/LICENSE-2.0
#
#   Unless required by applicable law or agreed to in writing, software
#   distributed under the License is distributed on an "AS IS" BASIS,
#   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
#   See the License for the specific language governing permissions and
#   limitations under the License.
#
import numpy
import crosscat.cython_code.ContinuousComponentModel as CCM
import crosscat.cython_code.MultinomialComponentModel as MCM
import crosscat.cython_code.State as State

c_hypers = dict(r=10,nu=10,s=10,mu=10)
ccm = CCM.p_ContinuousComponentModel(c_hypers)
print "empty component model"
print ccm
#
for element in [numpy.nan, 0, 1, numpy.nan, 2]:
    print
    ccm.insert_element(element)
    print "inserted %s" % element
    print ccm

m_hypers = dict(dirichlet_alpha=10,K=3)
mcm = MCM.p_MultinomialComponentModel(m_hypers)
print "empty component model"
print mcm

for element in [numpy.nan, 0, 1, numpy.nan, 2]: