- Optimizations for interval distributed benchmarks

benchmarks/Measures.py

@@ -164,6 +164,36 @@ def coverage(targets, forecasts):
     return np.mean(preds)
 
 
+def pinball(tau, target, forecast):
+    """
+    Pinball loss function. Measure the distance of forecast to the tau-quantile of the target 
+    :param tau: quantile value in the range (0,1)
+    :param target: 
+    :param forecast: 
+    :return: distance of forecast to the tau-quantile of the target
+    """
+    if target >= forecast:
+        return (target - forecast) * tau
+    else:
+        return (forecast - target) * (1 - tau)
+
+
+def pinball_mean(tau, targets, forecasts):
+    """
+    Mean pinball loss value of the forecast for a given tau-quantile of the targets
+    :param tau: quantile value in the range (0,1)
+    :param targets: list of target values
+    :param forecasts: list of prediction intervals
+    :return: 
+    """
+    preds = []
+    if tau <= 0.5:
+        preds = [pinball(tau, targets[i], forecasts[i][0]) for i in np.arange(0, len(forecasts))]
+    else:
+        preds = [pinball(tau, targets[i], forecasts[i][1]) for i in np.arange(0, len(forecasts))]
+    return np.nanmean(preds)
+
+
 def pmf_to_cdf(density):
     ret = []
     for row in density.index:
@@ -248,6 +278,10 @@ def get_interval_statistics(original, model):
     ret.append(round(sharpness(forecasts), 2))
     ret.append(round(resolution(forecasts), 2))
     ret.append(round(coverage(original[model.order:], forecasts[:-1]), 2))
+    ret.append(round(pinball_mean(0.05, original[model.order:], forecasts[:-1]), 2))
+    ret.append(round(pinball_mean(0.25, original[model.order:], forecasts[:-1]), 2))
+    ret.append(round(pinball_mean(0.75, original[model.order:], forecasts[:-1]), 2))
+    ret.append(round(pinball_mean(0.95, original[model.order:], forecasts[:-1]), 2))
     return ret
 
 

benchmarks/Util.py

@@ -240,8 +240,7 @@ def plot_dataframe_point(file_synthetic, file_analytic, experiments, tam):
     plt.show()
 
 
-
+def save_dataframe_interval(coverage, experiments, file, objs, resolution, save, sharpness, synthetic, times, q05, q25, q75, q95):
-def save_dataframe_interval(coverage, experiments, file, objs, resolution, save, sharpness, synthetic, times):
     ret = []
     if synthetic:
         for k in sorted(objs.keys()):
@@ -265,6 +264,14 @@ def save_dataframe_interval(coverage, experiments, file, objs, resolution, save,
             mod.append(round(np.nanstd(coverage[k]), 2))
             mod.append(round(np.nanmean(times[k]), 2))
             mod.append(round(np.nanstd(times[k]), 2))
+            mod.append(round(np.nanmean(q05[k]), 2))
+            mod.append(round(np.nanstd(q05[k]), 2))
+            mod.append(round(np.nanmean(q25[k]), 2))
+            mod.append(round(np.nanstd(q25[k]), 2))
+            mod.append(round(np.nanmean(q75[k]), 2))
+            mod.append(round(np.nanstd(q75[k]), 2))
+            mod.append(round(np.nanmean(q95[k]), 2))
+            mod.append(round(np.nanstd(q95[k]), 2))
             mod.append(l)
             ret.append(mod)
 
@@ -296,6 +303,18 @@ def save_dataframe_interval(coverage, experiments, file, objs, resolution, save,
                 tmp = [n, o, s, p, l, 'TIME']
                 tmp.extend(times[k])
                 ret.append(deepcopy(tmp))
+                tmp = [n, o, s, p, l, 'Q05']
+                tmp.extend(q05[k])
+                ret.append(deepcopy(tmp))
+                tmp = [n, o, s, p, l, 'Q25']
+                tmp.extend(q25[k])
+                ret.append(deepcopy(tmp))
+                tmp = [n, o, s, p, l, 'Q75']
+                tmp.extend(q75[k])
+                ret.append(deepcopy(tmp))
+                tmp = [n, o, s, p, l, 'Q95']
+                tmp.extend(q95[k])
+                ret.append(deepcopy(tmp))
             except Exception as ex:
                 print("Erro ao salvar ", k)
                 print("Exceção ", ex)
@@ -317,7 +336,7 @@ def interval_dataframe_analytic_columns(experiments):
 
 def interval_dataframe_synthetic_columns():
     columns = ["Model", "Order", "Scheme", "Partitions", "SHARPAVG", "SHARPSTD", "RESAVG", "RESSTD", "COVAVG",
-               "COVSTD", "TIMEAVG", "TIMESTD", "SIZE"]
+               "COVSTD", "TIMEAVG", "TIMESTD", "Q05AVG", "Q05STD", "Q25AVG", "Q25STD", "Q75AVG", "Q75STD", "Q95AVG", "Q95STD", "SIZE"]
     return columns
 
 

benchmarks/arima.py

@@ -3,6 +3,7 @@
 
 import numpy as np
 from statsmodels.tsa.arima_model import ARIMA as stats_arima
+import scipy.stats as st
 from pyFTS import fts
 
 
@@ -15,6 +16,8 @@ class ARIMA(fts.FTS):
         self.name = "ARIMA"
         self.detail = "Auto Regressive Integrated Moving Average"
         self.is_high_order = True
+        self.has_point_forecasting = True
+        self.has_interval_forecasting = True
         self.model = None
         self.model_fit = None
         self.trained_data = None
@@ -23,6 +26,7 @@ class ARIMA(fts.FTS):
         self.q = 0
         self.benchmark_only = True
         self.min_order = 1
+        self.alpha = (1 - kwargs.get("alpha", 0.90))/2
 
     def train(self, data, sets, order, parameters=None):
         self.p = order[0]
@@ -35,6 +39,7 @@ class ARIMA(fts.FTS):
         try:
             self.model =  stats_arima(data, order=(self.p, self.d, self.q))
             self.model_fit = self.model.fit(disp=0)
+            print(np.sqrt(self.model_fit.sigma2))
         except Exception as ex:
             print(ex)
             self.model_fit = None
@@ -72,3 +77,64 @@ class ARIMA(fts.FTS):
         ret = self.doInverseTransformations(ret, params=[data[self.order - 1:]])
 
         return ret
+
+    def forecastInterval(self, data, **kwargs):
+
+        if self.model_fit is None:
+            return np.nan
+
+        sigma = np.sqrt(self.model_fit.sigma2)
+
+        ndata = np.array(self.doTransformations(data))
+
+        l = len(ndata)
+
+        ret = []
+
+        for k in np.arange(self.order, l+1):
+            tmp = []
+
+            sample = [ndata[i] for i in np.arange(k - self.order, k)]
+
+            mean = self.forecast(sample)[0]
+
+            tmp.append(mean + st.norm.ppf(self.alpha) * sigma)
+            tmp.append(mean + st.norm.ppf(1 - self.alpha) * sigma)
+
+            ret.append(tmp)
+
+        ret = self.doInverseTransformations(ret, params=[data[self.order - 1:]])
+
+        return ret
+
+    def forecastAheadInterval(self, data, steps, **kwargs):
+        if self.model_fit is None:
+            return np.nan
+
+        smoothing = kwargs.get("smoothing",0.2)
+
+        alpha = (1 - kwargs.get("alpha", 0.95))/2
+
+        sigma = np.sqrt(self.model_fit.sigma2)
+
+        ndata = np.array(self.doTransformations(data))
+
+        l = len(ndata)
+
+        means = self.forecastAhead(data,steps,kwargs)
+
+        ret = []
+
+        for k in np.arange(0, steps):
+            tmp = []
+
+            hsigma = (1 + k*smoothing)*sigma
+
+            tmp.append(means[k] + st.norm.ppf(alpha) * hsigma)
+            tmp.append(means[k] + st.norm.ppf(1 - alpha) * hsigma)
+
+            ret.append(tmp)
+
+        ret = self.doInverseTransformations(ret, params=[data[self.order - 1:]])
+
+        return ret

benchmarks/distributed_benchmarks.py

@@ -73,7 +73,7 @@ def run_point(mfts, partitioner, train_data, test_data, window_key=None, transfo
     return ret
 
 
-def point_sliding_window(data, windowsize, train=0.8, models=None, partitioners=[Grid.GridPartitioner],
+def point_sliding_window(data, windowsize, train=0.8, inc=0.1, models=None, partitioners=[Grid.GridPartitioner],
                          partitions=[10], max_order=3, transformation=None, indexer=None, dump=False,
                          benchmark_models=None, benchmark_models_parameters = None,
                          save=False, file=None, sintetic=False,nodes=None, depends=None):
@@ -82,6 +82,7 @@ def point_sliding_window(data, windowsize, train=0.8, models=None, partitioners=
     :param data: 
     :param windowsize: size of sliding window
     :param train: percentual of sliding window data used to train the models
+    :param inc: percentual of window is used do increment 
     :param models: FTS point forecasters
     :param partitioners: Universe of Discourse partitioner
     :param partitions: the max number of partitions on the Universe of Discourse 
@@ -146,7 +147,7 @@ def point_sliding_window(data, windowsize, train=0.8, models=None, partitioners=
             pool.append(mfts)
 
     experiments = 0
-    for ct, train, test in Util.sliding_window(data, windowsize, train):
+    for ct, train, test in Util.sliding_window(data, windowsize, train, inc):
         experiments += 1
 
         benchmarks_only = {}
@@ -223,8 +224,13 @@ def run_interval(mfts, partitioner, train_data, test_data, window_key=None, tran
 
     tmp2 = [Grid.GridPartitioner, Entropy.EntropyPartitioner, FCM.FCMPartitioner]
 
+    tmp4 = [arima.ARIMA, quantreg.QuantileRegression]
+
     tmp3 = [Measures.get_interval_statistics]
 
+    if mfts.benchmark_only:
+        _key = mfts.shortname + str(mfts.order if mfts.order is not None else "") + str(mfts.alpha)
+    else:
         pttr = str(partitioner.__module__).split('.')[-1]
         _key = mfts.shortname + " n = " + str(mfts.order) + " " + pttr + " q = " + str(partitioner.partitions)
         mfts.partitioner = partitioner
@@ -237,24 +243,26 @@ def run_interval(mfts, partitioner, train_data, test_data, window_key=None, tran
     times = _end - _start
 
     _start = time.time()
-    _sharp, _res, _cov = Measures.get_interval_statistics(test_data, mfts)
+    _sharp, _res, _cov, _q05, _q25, _q75, _q95 = Measures.get_interval_statistics(test_data, mfts)
     _end = time.time()
     times += _end - _start
 
     ret = {'key': _key, 'obj': mfts, 'sharpness': _sharp, 'resolution': _res, 'coverage': _cov, 'time': times,
-           'window': window_key}
+           'Q05': _q05, 'Q25': _q25, 'Q75': _q75, 'Q95': _q95, 'window': window_key}
 
     return ret
 
 
-def interval_sliding_window(data, windowsize, train=0.8, models=None, partitioners=[Grid.GridPartitioner],
+def interval_sliding_window(data, windowsize, train=0.8,  inc=0.1, models=None, partitioners=[Grid.GridPartitioner],
                             partitions=[10], max_order=3, transformation=None, indexer=None, dump=False,
+                            benchmark_models=None, benchmark_models_parameters = None,
                             save=False, file=None, sintetic=False,nodes=None, depends=None):
     """
      Distributed sliding window benchmarks for FTS interval forecasters
      :param data: 
      :param windowsize: size of sliding window
      :param train: percentual of sliding window data used to train the models
+     :param inc:
      :param models: FTS point forecasters
      :param partitioners: Universe of Discourse partitioner
      :param partitions: the max number of partitions on the Universe of Discourse 
@@ -262,6 +270,8 @@ def interval_sliding_window(data, windowsize, train=0.8, models=None, partitione
      :param transformation: data transformation
      :param indexer: seasonal indexer
      :param dump: 
+     :param benchmark_models:
+     :param benchmark_models_parameters:
      :param save: save results
      :param file: file path to save the results
      :param sintetic: if true only the average and standard deviation of the results
@@ -270,6 +280,15 @@ def interval_sliding_window(data, windowsize, train=0.8, models=None, partitione
      :return: DataFrame with the results
      """
 
+    alphas = [0.5, 0.25]
+
+    if benchmark_models is None and models is None:
+        benchmark_models = [arima.ARIMA, arima.ARIMA, arima.ARIMA, arima.ARIMA,
+                            quantreg.QuantileRegression, quantreg.QuantileRegression]
+
+    if benchmark_models_parameters is None:
+        benchmark_models_parameters = [(1, 0, 0), (1, 0, 1), (2, 0, 1), (2, 0, 2), 1, 2]
+
     cluster = dispy.JobCluster(run_point, nodes=nodes) #, depends=dependencies)
 
     http_server = dispy.httpd.DispyHTTPServer(cluster)
@@ -284,6 +303,10 @@ def interval_sliding_window(data, windowsize, train=0.8, models=None, partitione
     sharpness = {}
     resolution = {}
     coverage = {}
+    q05 = {}
+    q25 = {}
+    q75 = {}
+    q95 = {}
     times = {}
 
     if models is None:
@@ -299,12 +322,23 @@ def interval_sliding_window(data, windowsize, train=0.8, models=None, partitione
                     mfts.order = order
                     pool.append(mfts)
         else:
+            mfts.order = 1
+            pool.append(mfts)
+
+    if benchmark_models is not None:
+        for count, model in enumerate(benchmark_models, start=0):
+            for a in alphas:
+                par = benchmark_models_parameters[count]
+                mfts = model(str(par if par is not None else ""), alpha=a)
+                mfts.order = par
                 pool.append(mfts)
 
     experiments = 0
-    for ct, train, test in Util.sliding_window(data, windowsize, train):
+    for ct, train, test in Util.sliding_window(data, windowsize, train, inc=inc):
         experiments += 1
 
+        benchmarks_only = {}
+
         if dump: print('\nWindow: {0}\n'.format(ct))
 
         for partition in partitions:
@@ -314,6 +348,10 @@ def interval_sliding_window(data, windowsize, train=0.8, models=None, partitione
                 data_train_fs = partitioner(train, partition, transformation=transformation)
 
                 for id, m in enumerate(pool,start=0):
+                    if m.benchmark_only and m.shortname in benchmarks_only:
+                        continue
+                    else:
+                        benchmarks_only[m.shortname] = m
                     job = cluster.submit(m, data_train_fs, train, test, ct, transformation)
                     job.id = id  # associate an ID to identify jobs (if needed later)
                     jobs.append(job)
@@ -327,11 +365,19 @@ def interval_sliding_window(data, windowsize, train=0.8, models=None, partitione
                 resolution[tmp['key']] = []
                 coverage[tmp['key']] = []
                 times[tmp['key']] = []
+                q05[tmp['key']] = []
+                q25[tmp['key']] = []
+                q75[tmp['key']] = []
+                q95[tmp['key']] = []
 
             sharpness[tmp['key']].append(tmp['sharpness'])
             resolution[tmp['key']].append(tmp['resolution'])
             coverage[tmp['key']].append(tmp['coverage'])
             times[tmp['key']].append(tmp['time'])
+            q05[tmp['key']].append(tmp['Q05'])
+            q25[tmp['key']].append(tmp['Q25'])
+            q75[tmp['key']].append(tmp['Q75'])
+            q95[tmp['key']].append(tmp['Q95'])
             print(tmp['key'])
         else:
             print(job.exception)
@@ -350,8 +396,8 @@ def interval_sliding_window(data, windowsize, train=0.8, models=None, partitione
     http_server.shutdown()  # this waits until browser gets all updates
     cluster.close()
 
-    return benchmarks.save_dataframe_interval(coverage, experiments, file, objs, resolution, save, sharpness, sintetic,
+    return bUtil.save_dataframe_interval(coverage, experiments, file, objs, resolution, save, sharpness, sintetic,
-                                              times)
+                                         times, q05, q25, q75, q95)
 
 
 def run_ahead(mfts, partitioner, train_data, test_data, steps, resolution, window_key=None, transformation=None, indexer=None):

benchmarks/quantreg.py

@@ -19,7 +19,7 @@ class QuantileRegression(fts.FTS):
         self.has_probability_forecasting = True
         self.benchmark_only = True
         self.minOrder = 1
-        self.alpha = 0.5
+        self.alpha = kwargs.get("alpha", 0.05)
         self.upper_qt = None
         self.mean_qt = None
         self.lower_qt = None
@@ -27,8 +27,6 @@ class QuantileRegression(fts.FTS):
     def train(self, data, sets, order=1, parameters=None):
         self.order = order
 
-        self.alpha = parameters
-
         tmp = np.array(self.doTransformations(data))
 
         lagdata, ndata = lagmat(tmp, maxlag=order, trim="both", original='sep')

ensemble.py

@@ -72,7 +72,7 @@ class EnsembleFTS(fts.FTS):
 
         ret = []
 
-        for k in np.arange(0, l):
+        for k in np.arange(0, l+1):
             tmp = []
             for model in self.models:
                 if k >= model.minOrder - 1:

fts.py

@@ -88,7 +88,13 @@ class FTS(object):
         :param kwargs: 
         :return: 
         """
-        pass
+        ret = []
+        for k in np.arange(0,steps):
+            tmp = self.forecast(data[-self.order:],kwargs)
+            ret.append(tmp)
+            data.append(tmp)
+
+        return ret
 
     def forecastAheadInterval(self, data, steps, **kwargs):
         """

tests/general.py

@@ -22,40 +22,36 @@ os.chdir("/home/petronio/dados/Dropbox/Doutorado/Codigos/")
 #enrollments = pd.read_csv("DataSets/Enrollments.csv", sep=";")
 #enrollments = np.array(enrollments["Enrollments"])
 
-#from pyFTS import song
+"""
-
+DATASETS
-#enrollments_fs = Grid.GridPartitioner(enrollments, 10).sets
+"""
-
-#model = song.ConventionalFTS('')
-#model.train(enrollments,enrollments_fs)
-#teste = model.forecast(enrollments)
-
-#print(teste)
-
-
-#print(FCM.FCMPartitionerTrimf.__module__)
 
 #gauss = random.normal(0,1.0,5000)
 #gauss_teste = random.normal(0,1.0,400)
 
-taiexpd = pd.read_csv("DataSets/TAIEX.csv", sep=",")
+#taiexpd = pd.read_csv("DataSets/TAIEX.csv", sep=",")
-taiex = np.array(taiexpd["avg"][:2000])
+#taiex = np.array(taiexpd["avg"][:5000])
 
 #nasdaqpd = pd.read_csv("DataSets/NASDAQ_IXIC.csv", sep=",")
 #nasdaq = np.array(nasdaqpd["avg"][0:5000])
 
-#from statsmodels.tsa.arima_model import ARIMA as stats_arima
+#sp500pd = pd.read_csv("DataSets/S&P500.csv", sep=",")
-from statsmodels.tsa.tsatools import lagmat
+#sp500 = np.array(sp500pd["Avg"][11000:])
+#del(sp500pd)
 
-#tmp = np.arange(10)
+sondapd = pd.read_csv("DataSets/SONDA_BSB_HOURLY_AVG.csv", sep=";")
+sondapd = sondapd.dropna(axis=0, how='any')
+sonda = np.array(sondapd["ws_10m"])
+del(sondapd)
 
-#lag, a = lagmat(tmp, maxlag=2, trim="both", original='sep')
+#bestpd = pd.read_csv("DataSets/BEST_TAVG.csv", sep=";")
+#best = np.array(bestpd["Anomaly"])
 
 #print(lag)
 #print(a)
 
-from pyFTS.benchmarks import benchmarks as bchmk
+#from pyFTS.benchmarks import benchmarks as bchmk
-#from pyFTS.benchmarks import distributed_benchmarks as bchmk
+from pyFTS.benchmarks import distributed_benchmarks as bchmk
 #from pyFTS.benchmarks import parallel_benchmarks as bchmk
 from pyFTS.benchmarks import Util
 from pyFTS.benchmarks import arima, quantreg
@@ -66,9 +62,9 @@ from pyFTS.benchmarks import arima, quantreg
 
 #tmp = arima.ARIMA("")
 #tmp.train(taiex[:1600], None, order=(2,0,2))
-#teste = tmp.forecast(taiex[1600:1605])
+#teste = tmp.forecastInterval(taiex[1600:1605])
 
-#tmp = quantreg.QuantileRegression("")
+#tmp = quan#treg.QuantileRegression("")
 #tmp.train(taiex[:1600], None, order=2)
 #teste = tmp.forecast(taiex[1600:1605])
 
@@ -80,21 +76,20 @@ from pyFTS.benchmarks import arima, quantreg
 from pyFTS import song, chen, yu, cheng
 
 
-bchmk.point_sliding_window(taiex,1000,train=0.8, models=[], #song.ConventionalFTS, chen.ConventionalFTS], #[yu.WeightedFTS, cheng.TrendWeightedFTS], # #
+bchmk.point_sliding_window(sonda, 9000, train=0.8, inc=0.4,#models=[yu.WeightedFTS], # #
                      partitioners=[Grid.GridPartitioner], #Entropy.EntropyPartitioner], # FCM.FCMPartitioner, ],
-                     partitions= [10], #np.arange(10,200,step=10), #transformation=diff,
+                     partitions= np.arange(10,200,step=10), #transformation=diff,
-                     dump=True, save=True, file="experiments/XXXtaiex_point_analytic.csv") #,
+                     dump=True, save=True, file="experiments/sondaws_point_analytic.csv",
-#                     nodes=['192.168.0.102', '192.168.0.109', '192.168.0.106']) #, depends=[hofts, ifts])
+                     nodes=['192.168.0.103', '192.168.0.106', '192.168.0.108', '192.168.0.109']) #, depends=[hofts, ifts])
 
-"""
 diff = Transformations.Differential(1)
 
-bchmk.point_sliding_window(taiex,2000,train=0.8, #models=[yu.WeightedFTS], # #
+bchmk.point_sliding_window(sonda, 9000, train=0.8, inc=0.4, #models=[yu.WeightedFTS], # #
                      partitioners=[Grid.GridPartitioner], #Entropy.EntropyPartitioner], # FCM.FCMPartitioner, ],
-                     partitions= np.arange(10,200,step=10), transformation=diff,
+                     partitions= np.arange(3,20,step=2), #transformation=diff,
-                     dump=True, save=True, file="experiments/taiex_point_analytic_diff.csv",
+                     dump=True, save=True, file="experiments/sondaws_point_analytic_diff.csv",
-                     nodes=['192.168.0.102', '192.168.0.109', '192.168.0.106']) #, depends=[hofts, ifts])
+                     nodes=['192.168.0.103', '192.168.0.106', '192.168.0.108', '192.168.0.109']) #, depends=[hofts, ifts])
-"""
+#"""
 #bchmk.testa(taiex,[10,20],partitioners=[Grid.GridPartitioner], nodes=['192.168.0.109', '192.168.0.101'])
 
 #parallel_util.explore_partitioners(taiex,20)