diff --git a/benchmarks/benchmarks.py b/benchmarks/benchmarks.py
index f499273..1224328 100644
--- a/benchmarks/benchmarks.py
+++ b/benchmarks/benchmarks.py
@@ -23,13 +23,106 @@ styles = ['-','--','-.',':','.']
 
 nsty = len(styles)
 
+def get_point_methods():
+    return [naive.Naive, chen.ConventionalFTS, yu.WeightedFTS, ismailefendi.ImprovedWeightedFTS,
+                  sadaei.ExponentialyWeightedFTS, hofts.HighOrderFTS, pwfts.ProbabilisticWeightedFTS]
+
+
+def sliding_window(data, windowsize, train=0.8,models=None,partitioners=[Grid.GridPartitioner],
+                   partitions=[10], max_order=3,transformation=None,indexer=None):
+    if models is None:
+        models = get_point_methods()
+
+    objs = {}
+    lcolors = {}
+    rmse = {}
+    smape = {}
+    u = {}
+
+    for train,test in Util.sliding_window(data, windowsize, train):
+        for partition in partitions:
+            for partitioner in partitioners:
+                pttr = str(partitioner.__module__).split('.')[-1]
+                if transformation is not None:
+                    data_train_fs = partitioner(transformation.apply(train), partition)
+                else:
+                    data_train_fs = partitioner(train, partition)
+
+                for count, model in enumerate(models, start=0):
+
+                    mfts = model("")
+                    _key = mfts.shortname + " " + pttr+ " q = " +str(partition)
+
+                    mfts.partitioner = data_train_fs
+                    if not mfts.isHighOrder:
+
+                        if _key not in objs:
+                            objs[_key] = mfts
+                            lcolors[_key] = colors[count % ncol]
+                            rmse[_key] = []
+                            smape[_key] = []
+                            u[_key] = []
+
+                        if transformation is not None:
+                            mfts.appendTransformation(transformation)
+
+                        mfts.train(train, data_train_fs.sets)
+
+                        _rmse, _smape, _u = get_point_statistics(test, mfts, indexer)
+                        rmse[_key].append(_rmse)
+                        smape[_key].append(_smape)
+                        u[_key].append(_u)
+
+                    else:
+                        for order in np.arange(1, max_order + 1):
+                            if order >= mfts.minOrder:
+                                mfts = model("")
+                                _key = mfts.shortname + " n = " + str(order) + " " + pttr + " q = " + str(partition)
+                                mfts.partitioner = data_train_fs
+
+                                if _key not in objs:
+                                    objs[_key] = mfts
+                                    lcolors[_key] = colors[count % ncol]
+                                    rmse[_key] = []
+                                    smape[_key] = []
+                                    u[_key] = []
+
+                                if transformation is not None:
+                                    mfts.appendTransformation(transformation)
+
+                                mfts.train(train, data_train_fs.sets, order=order)
+
+                                _rmse, _smape, _u = get_point_statistics(test, mfts, indexer)
+                                rmse[_key].append(_rmse)
+                                smape[_key].append(_smape)
+                                u[_key].append(_u)
+
+    ret =  "Model\t&Order\t&Scheme\t&Partitions\t&RMSE AVG\t&RMSE STD\t& SMAPE AVG\t& SMAPE STD\t& U AVG\t& U	STD	\\\\ \n"
+    for k in sorted(objs.keys()):
+        mfts = objs[k]
+        ret +=   mfts.shortname + "\t &"
+        ret += str( mfts.order ) + "\t &"
+        ret += mfts.partitioner.name + "\t &"
+        ret += str(mfts.partitioner.partitions) + "\t &"
+        ret += str(round(np.mean(rmse[k]),2)) + "\t &"
+        ret += str(round(np.std(rmse[k]), 2)) + "\t &"
+        ret += str(round(np.mean(smape[k]), 2)) + "\t &"
+        ret += str(round(np.std(smape[k]), 2)) + "\t &"
+        ret += str(round(np.mean(u[k]), 2)) + "\t &"
+        ret += str(round(np.std(u[k]), 2)) + "\t &"
+        ret += str(len(mfts)) + "\\\\ \n"
+
+    print(ret)
+
+
+
+
 def allPointForecasters(data_train, data_test, partitions, max_order=3, statistics=True, residuals=True,
                         series=True, save=False, file=None, tam=[20, 5], models=None, transformation=None,
                         distributions=False):
 
     if models is None:
-        models = [naive.Naive, chen.ConventionalFTS, yu.WeightedFTS, ismailefendi.ImprovedWeightedFTS,
-                  sadaei.ExponentialyWeightedFTS, hofts.HighOrderFTS, pwfts.ProbabilisticWeightedFTS]
+        models = get_point_methods()
 
     objs = []
 
@@ -62,7 +155,7 @@ def allPointForecasters(data_train, data_test, partitions, max_order=3, statisti
                     lcolors.append(colors[(count + order) % ncol])
 
     if statistics:
-        print(getPointStatistics(data_test, objs))
+        print(print_point_statistics(data_test, objs))
 
     if residuals:
         print(ResidualAnalysis.compareResiduals(data_test, objs))
@@ -87,29 +180,38 @@ def allPointForecasters(data_train, data_test, partitions, max_order=3, statisti
 
         plotProbabilityDistributions(pmfs, lcolors,tam=tam)
 
+def get_point_statistics(data, model, indexer=None):
+    if indexer is not None:
+        ndata = np.array(indexer.get_data(data[model.order:]))
+    else:
+        ndata = np.array(data[model.order:])
 
-def getPointStatistics(data, models, externalmodels = None, externalforecasts = None, indexers=None):
+    if model.isMultivariate or indexer is None:
+        forecasts = model.forecast(data)
+    elif not model.isMultivariate and indexer is not None:
+        forecasts = model.forecast(indexer.get_data(data))
+
+    if model.hasSeasonality:
+        nforecasts = np.array(forecasts)
+    else:
+        nforecasts = np.array(forecasts[:-1])
+    ret = list()
+    ret.append(np.round(Measures.rmse(ndata, nforecasts), 2))
+    ret.append(np.round(Measures.smape(ndata, nforecasts), 2))
+    ret.append(np.round(Measures.UStatistic(ndata, nforecasts), 2))
+
+    return ret
+
+
+def print_point_statistics(data, models, externalmodels = None, externalforecasts = None, indexers=None):
     ret = "Model		& Order     & RMSE		& SMAPE      & Theil's U		\\\\ \n"
     for count,model in enumerate(models,start=0):
-        if indexers is not None and indexers[count] is not None:
-            ndata = np.array(indexers[count].get_data(data[model.order:]))
-        else:
-            ndata = np.array(data[model.order:])
-
-        if model.isMultivariate or indexers is None:
-            forecasts = model.forecast(data)
-        elif not model.isMultivariate and indexers is not None:
-            forecasts = model.forecast( indexers[count].get_data(data) )
-
-        if model.hasSeasonality:
-            nforecasts = np.array(forecasts)
-        else:
-            nforecasts = np.array(forecasts[:-1])
+        _rmse, _smape, _u = get_point_statistics(data, model, indexers[count])
         ret += model.shortname + "		& "
         ret += str(model.order) + "		& "
-        ret += str(round(Measures.rmse(ndata, nforecasts), 2)) + "		& "
-        ret += str(round(Measures.smape(ndata, nforecasts), 2))+ "		& "
-        ret += str(round(Measures.UStatistic(ndata, nforecasts), 2))
+        ret += str(_rmse) + "		& "
+        ret += str(_smape)+ "		& "
+        ret += str(_u)
         #ret += str(round(Measures.TheilsInequality(np.array(data[fts.order:]), np.array(forecasts[:-1])), 4))
         ret += "	\\\\ \n"
     if externalmodels is not None:
@@ -194,7 +296,7 @@ def plotDistribution(dist):
 
 
 def plotComparedSeries(original, models, colors, typeonlegend=False, save=False, file=None, tam=[20, 5],
-                       intervals=True):
+                       points=True, intervals=True, linewidth=1.5):
     fig = plt.figure(figsize=tam)
     ax = fig.add_subplot(111)
 
@@ -203,10 +305,10 @@ def plotComparedSeries(original, models, colors, typeonlegend=False, save=False,
 
     legends = []
 
-    ax.plot(original, color='black', label="Original", linewidth=1.5)
+    ax.plot(original, color='black', label="Original", linewidth=linewidth*1.5)
 
     for count, fts in enumerate(models, start=0):
-        if fts.hasPointForecasting and not intervals:
+        if fts.hasPointForecasting and points:
             forecasted = fts.forecast(original)
             mi.append(min(forecasted) * 0.95)
             ma.append(max(forecasted) * 1.05)
@@ -214,7 +316,7 @@ def plotComparedSeries(original, models, colors, typeonlegend=False, save=False,
                 forecasted.insert(0, None)
             lbl = fts.shortname
             if typeonlegend: lbl += " (Point)"
-            ax.plot(forecasted, color=colors[count], label=lbl, ls="-")
+            ax.plot(forecasted, color=colors[count], label=lbl, ls="-",linewidth=linewidth)
 
         if fts.hasIntervalForecasting and intervals:
             forecasted = fts.forecastInterval(original)
@@ -227,8 +329,8 @@ def plotComparedSeries(original, models, colors, typeonlegend=False, save=False,
                 upper.insert(0, None)
             lbl = fts.shortname
             if typeonlegend: lbl += " (Interval)"
-            ax.plot(lower, color=colors[count], label=lbl, ls="-")
-            ax.plot(upper, color=colors[count], ls="-")
+            ax.plot(lower, color=colors[count], label=lbl, ls="--",linewidth=linewidth)
+            ax.plot(upper, color=colors[count], ls="--",linewidth=linewidth)
 
         handles0, labels0 = ax.get_legend_handles_labels()
         lgd = ax.legend(handles0, labels0, loc=2, bbox_to_anchor=(1, 1))
diff --git a/benchmarks/naive.py b/benchmarks/naive.py
index 7b6da95..7e6674e 100644
--- a/benchmarks/naive.py
+++ b/benchmarks/naive.py
@@ -6,7 +6,7 @@ from pyFTS import fts
 
 class Naive(fts.FTS):
     def __init__(self, name):
-        super(Naive, self).__init__(1, "Naïve" + name)
+        super(Naive, self).__init__(1, "Naïve " + name)
         self.name = "Naïve Model"
         self.detail = "Naïve Model"
 
diff --git a/chen.py b/chen.py
index 529f2d3..eb1ab49 100644
--- a/chen.py
+++ b/chen.py
@@ -20,10 +20,13 @@ class ConventionalFLRG(object):
             tmp2 = tmp2 + c.name
         return tmp + tmp2
 
+    def __len__(self):
+        return len(self.RHS)
+
 
 class ConventionalFTS(fts.FTS):
     def __init__(self, name):
-        super(ConventionalFTS, self).__init__(1, "CFTS")
+        super(ConventionalFTS, self).__init__(1, "CFTS " + name)
         self.name = "Conventional FTS"
         self.detail = "Chen"
         self.flrgs = {}
diff --git a/common/Util.py b/common/Util.py
index 62ac6bc..0b27ba4 100644
--- a/common/Util.py
+++ b/common/Util.py
@@ -1,6 +1,7 @@
 import time
 import matplotlib.pyplot as plt
 import dill
+import numpy as np
 
 
 current_milli_time = lambda: int(round(time.time() * 1000))
@@ -29,6 +30,12 @@ def enumerate2(xs, start=0, step=1):
         yield (start, x)
         start += step
 
+def sliding_window(data, windowsize, train=0.8):
+    l = len(data)
+    ttrain = int(round(windowsize * train, 0))
+    for count in np.arange(0,l,windowsize):
+        yield ( data[count : count + ttrain], data[count + ttrain : count + windowsize]  )
+
 
 def persist_obj(obj, file):
     with open(file, 'wb') as _file:
diff --git a/fts.py b/fts.py
index d315d9f..a48fb04 100644
--- a/fts.py
+++ b/fts.py
@@ -25,6 +25,7 @@ class FTS(object):
         self.transformations_param = []
         self.original_max = 0
         self.original_min = 0
+        self.partitioner = None
 
     def fuzzy(self, data):
         best = {"fuzzyset": "", "membership": 0.0}
@@ -55,7 +56,7 @@ class FTS(object):
     def forecastAheadDistribution(self, data, steps):
         pass
 
-    def train(self, data, sets,order=1, parameters=None):
+    def train(self, data, sets, order=1, parameters=None):
         pass
 
     def getMidpoints(self, flrg):
@@ -104,6 +105,12 @@ class FTS(object):
             tmp = tmp + str(self.flrgs[r]) + "\n"
         return tmp
 
+    def __len__(self):
+       return len(self.flrgs)
+
+    def len_total(self):
+        return sum([len(k) for k in self.flrgs])
+
     def buildTreeWithoutOrder(self, node, lags, level):
 
         if level not in lags:
@@ -168,3 +175,4 @@ class FTS(object):
 
 
 
+
diff --git a/hofts.py b/hofts.py
index 30064e3..43a7af8 100644
--- a/hofts.py
+++ b/hofts.py
@@ -3,7 +3,7 @@ from pyFTS.common import FuzzySet,FLR
 from pyFTS import fts
 
 
-class HighOrderFLRG:
+class HighOrderFLRG(object):
     def __init__(self, order):
         self.LHS = []
         self.RHS = {}
@@ -34,6 +34,10 @@ class HighOrderFLRG:
         return self.strLHS() + " -> " + tmp
 
 
+    def __len__(self):
+        return len(self.RHS)
+
+
 class HighOrderFTS(fts.FTS):
     def __init__(self, name):
         super(HighOrderFTS, self).__init__(1, "HOFTS" + name)
diff --git a/ismailefendi.py b/ismailefendi.py
index 7afc5ad..60d1e44 100644
--- a/ismailefendi.py
+++ b/ismailefendi.py
@@ -3,7 +3,7 @@ from pyFTS.common import FuzzySet,FLR
 from pyFTS import fts
 
 
-class ImprovedWeightedFLRG:
+class ImprovedWeightedFLRG(object):
     def __init__(self, LHS):
         self.LHS = LHS
         self.RHS = {}
@@ -28,10 +28,13 @@ class ImprovedWeightedFLRG:
             tmp2 = tmp2 + c + "(" + str(round(self.RHS[c] / self.count, 3)) + ")"
         return tmp + tmp2
 
+    def __len__(self):
+        return len(self.RHS)
+
 
 class ImprovedWeightedFTS(fts.FTS):
     def __init__(self, name):
-        super(ImprovedWeightedFTS, self).__init__(1, "IWFTS")
+        super(ImprovedWeightedFTS, self).__init__(1, "IWFTS " + name)
         self.name = "Improved Weighted FTS"
         self.detail = "Ismail & Efendi"
         self.setsDict = {}
diff --git a/partitioners/CMeans.py b/partitioners/CMeans.py
index baf15fa..b9eb31b 100644
--- a/partitioners/CMeans.py
+++ b/partitioners/CMeans.py
@@ -3,6 +3,7 @@ import math
 import random as rnd
 import functools, operator
 from pyFTS.common import FuzzySet, Membership
+from pyFTS.partitioners import partitioner
 
 
 def distancia(x, y):
@@ -75,21 +76,24 @@ def c_means(k, dados, tam):
 
     return centroides
 
+class CMeansPartitioner(partitioner.Partitioner):
+    def __init__(self, npart,data,func = Membership.trimf):
+        super(CMeansPartitioner, self).__init__("CMeans ",data,npart,func)
 
-def CMeansPartitionerTrimf(data, npart, names=None, prefix="A"):
-    sets = []
-    dmax = max(data)
-    dmax += dmax * 0.10
-    dmin = min(data)
-    dmin -= dmin * 0.10
-    centroides = c_means(npart, data, 1)
-    centroides.append(dmax)
-    centroides.append(dmin)
-    centroides = list(set(centroides))
-    centroides.sort()
-    for c in np.arange(1, len(centroides) - 1):
-        sets.append(FuzzySet.FuzzySet(prefix + str(c), Membership.trimf,
-                             [round(centroides[c - 1], 3), round(centroides[c], 3), round(centroides[c + 1], 3)],
-                             round(centroides[c], 3)))
+    def build(self, data):
+        sets = []
+        dmax = max(data)
+        dmax += dmax * 0.10
+        dmin = min(data)
+        dmin -= dmin * 0.10
+        centroides = c_means(self.partitions, data, 1)
+        centroides.append(dmax)
+        centroides.append(dmin)
+        centroides = list(set(centroides))
+        centroides.sort()
+        for c in np.arange(1, len(centroides) - 1):
+            sets.append(FuzzySet.FuzzySet(self.prefix + str(c), Membership.trimf,
+                                 [round(centroides[c - 1], 3), round(centroides[c], 3), round(centroides[c + 1], 3)],
+                                 round(centroides[c], 3)))
 
-    return sets
+        return sets
diff --git a/partitioners/Entropy.py b/partitioners/Entropy.py
index cbf6dc4..54af91e 100644
--- a/partitioners/Entropy.py
+++ b/partitioners/Entropy.py
@@ -3,7 +3,7 @@ import math
 import random as rnd
 import functools, operator
 from pyFTS.common import FuzzySet, Membership
-
+from pyFTS.partitioners import partitioner
 
 # C. H. Cheng, R. J. Chang, and C. A. Yeh, “Entropy-based and trapezoidal fuzzification-based fuzzy time series approach for forecasting IT project cost,”
 # Technol. Forecast. Social Change, vol. 73, no. 5, pp. 524–542, Jun. 2006.
@@ -76,21 +76,24 @@ def bestSplit(data, npart):
     else:
         return [threshold]
 
+class EntropyPartitioner(partitioner.Partitioner):
+    def __init__(self, data,npart,func = Membership.trimf):
+        super(EntropyPartitioner, self).__init__("Entropy" ,data,npart,func)
 
-def EntropyPartitionerTrimf(data, npart, prefix="A"):
-    sets = []
-    dmax = max(data)
-    dmax += dmax * 0.10
-    dmin = min(data)
-    dmin -= dmin * 0.10
+    def build(self, data):
+        sets = []
+        dmax = max(data)
+        dmax += dmax * 0.10
+        dmin = min(data)
+        dmin -= dmin * 0.10
 
-    partitions = bestSplit(data, npart)
-    partitions.append(dmin)
-    partitions.append(dmax)
-    partitions = list(set(partitions))
-    partitions.sort()
-    for c in np.arange(1, len(partitions) - 1):
-        sets.append(FuzzySet.FuzzySet(prefix + str(c), Membership.trimf,
-                                      [partitions[c - 1], partitions[c], partitions[c + 1]],partitions[c]))
+        partitions = bestSplit(data, self.partitions)
+        partitions.append(dmin)
+        partitions.append(dmax)
+        partitions = list(set(partitions))
+        partitions.sort()
+        for c in np.arange(1, len(partitions) - 1):
+            sets.append(FuzzySet.FuzzySet(self.prefix + str(c), Membership.trimf,
+                                          [partitions[c - 1], partitions[c], partitions[c + 1]],partitions[c]))
 
-    return sets
+        return sets
diff --git a/partitioners/FCM.py b/partitioners/FCM.py
index 153150d..e940da5 100644
--- a/partitioners/FCM.py
+++ b/partitioners/FCM.py
@@ -3,19 +3,20 @@ import math
 import random as rnd
 import functools,operator
 from pyFTS.common import FuzzySet,Membership
+from pyFTS.partitioners import partitioner
 #import CMeans
 
 # S. T. Li, Y. C. Cheng, and S. Y. Lin, “A FCM-based deterministic forecasting model for fuzzy time series,”
 # Comput. Math. Appl., vol. 56, no. 12, pp. 3052–3063, Dec. 2008. DOI: 10.1016/j.camwa.2008.07.033.
 
-def distancia(x,y):
+def fuzzy_distance(x, y):
     if isinstance(x, list):
         tmp = functools.reduce(operator.add, [(x[k] - y[k])**2 for k in range(0,len(x))])
     else:
         tmp = (x - y) ** 2
     return math.sqrt(tmp)
 
-def pert(val, vals):
+def membership(val, vals):
     soma = 0
     for k in vals:
         if k == 0:
@@ -55,7 +56,7 @@ def fuzzy_cmeans(k, dados, tam, m, deltadist=0.001):
 
             grupo_count = 0
             for grupo in centroides:
-                dist_grupos[grupo_count] = distancia(grupo, instancia)
+                dist_grupos[grupo_count] = fuzzy_distance(grupo, instancia)
                 grupo_count = grupo_count + 1
 
             dist_grupos_total = functools.reduce(operator.add, [xk for xk in dist_grupos])
@@ -64,7 +65,7 @@ def fuzzy_cmeans(k, dados, tam, m, deltadist=0.001):
                 if dist_grupos[grp] == 0:
                     grupos[inst_count][grp] = 1
                 else:
-                    grupos[inst_count][grp] = 1 / pert(dist_grupos[grp], dist_grupos)
+                    grupos[inst_count][grp] = 1 / membership(dist_grupos[grp], dist_grupos)
                     # grupos[inst_count][grp] = 1/(dist_grupos[grp] / dist_grupos_total)
                     # grupos[inst_count][grp] = (1/(dist_grupos[grp]**2))**m_exp / (1/(dist_grupos_total**2))**m_exp
 
@@ -90,7 +91,7 @@ def fuzzy_cmeans(k, dados, tam, m, deltadist=0.001):
                 norm = functools.reduce(operator.add, [grupos[xk][grupo_count] for xk in range(0, tam_dados)])
                 centroides[grupo_count] = soma / norm
 
-            alteracaomedia = alteracaomedia + distancia(oldgrp, grupo)
+            alteracaomedia = alteracaomedia + fuzzy_distance(oldgrp, grupo)
             grupo_count = grupo_count + 1
 
         alteracaomedia = alteracaomedia / k
@@ -98,18 +99,23 @@ def fuzzy_cmeans(k, dados, tam, m, deltadist=0.001):
 
     return centroides
 
-def FCMPartitionerTrimf(data,npart,names = None,prefix = "A"):
-    sets = []
-    dmax = max(data)
-    dmax = dmax + dmax*0.10
-    dmin = min(data)
-    dmin = dmin - dmin*0.10
-    centroides = fuzzy_cmeans(npart, data, 1, 2)
-    centroides.append(dmax)
-    centroides.append(dmin)
-    centroides = list(set(centroides))
-    centroides.sort()
-    for c in np.arange(1,len(centroides)-1):
-        sets.append(FuzzySet.FuzzySet(prefix+str(c),Membership.trimf,[round(centroides[c-1],3), round(centroides[c],3), round(centroides[c+1],3)], round(centroides[c],3) ) )
 
-    return sets
\ No newline at end of file
+class FCMPartitioner(partitioner.Partitioner):
+    def __init__(self, data,npart,func = Membership.trimf):
+        super(FCMPartitioner, self).__init__("FCM ",data,npart,func)
+
+    def build(self,data):
+        sets = []
+        dmax = max(data)
+        dmax = dmax + dmax*0.10
+        dmin = min(data)
+        dmin = dmin - dmin*0.10
+        centroides = fuzzy_cmeans(self.partitions, data, 1, 2)
+        centroides.append(dmax)
+        centroides.append(dmin)
+        centroides = list(set(centroides))
+        centroides.sort()
+        for c in np.arange(1,len(centroides)-1):
+            sets.append(FuzzySet.FuzzySet(self.prefix+str(c),Membership.trimf,[round(centroides[c-1],3), round(centroides[c],3), round(centroides[c+1],3)], round(centroides[c],3) ) )
+
+        return sets
\ No newline at end of file
diff --git a/partitioners/Grid.py b/partitioners/Grid.py
index 2b8ceb8..2b64720 100644
--- a/partitioners/Grid.py
+++ b/partitioners/Grid.py
@@ -3,49 +3,39 @@ import math
 import random as rnd
 import functools, operator
 from pyFTS.common import FuzzySet, Membership
+from pyFTS.partitioners import partitioner
 
 
-# print(common.__dict__)
+class GridPartitioner(partitioner.Partitioner):
+    def __init__(self, data,npart,func = Membership.trimf):
+        super(GridPartitioner, self).__init__("Grid",data,npart,func)
 
-def GridPartitionerTrimf(data, npart, names=None, prefix="A"):
-    sets = []
-    _min = min(data)
-    if _min < 0:
-        dmin = _min * 1.1
-    else:
-        dmin = _min * 0.9
+    def build(self, data):
+        sets = []
+        _min = min(data)
+        if _min < 0:
+            dmin = _min * 1.1
+        else:
+            dmin = _min * 0.9
 
-    _max = max(data)
-    if _max > 0:
-        dmax = _max * 1.1
-    else:
-        dmax = _max * 0.9
+        _max = max(data)
+        if _max > 0:
+            dmax = _max * 1.1
+        else:
+            dmax = _max * 0.9
 
-    dlen = dmax - dmin
-    partlen = dlen / npart
+        dlen = dmax - dmin
+        partlen = dlen / self.partitions
 
-    count = 0
-    for c in np.arange(dmin, dmax, partlen):
-        sets.append(
-            FuzzySet.FuzzySet(prefix + str(count), Membership.trimf, [c - partlen, c, c + partlen],c))
-        count += 1
-
-    return sets
+        count = 0
+        for c in np.arange(dmin, dmax, partlen):
+            if self.membership_function == Membership.trimf:
+                sets.append(
+                    FuzzySet.FuzzySet(self.prefix + str(count), Membership.trimf, [c - partlen, c, c + partlen],c))
+            elif self.membership_function == Membership.gaussmf:
+                sets.append(
+                    FuzzySet.FuzzySet(self.prefix + str(count), Membership.gaussmf, [c, partlen / 3], c))
+            count += 1
 
 
-def GridPartitionerGaussmf(data, npart, names=None, prefix="A"):
-    sets = []
-    dmax = max(data)
-    dmax += dmax * 0.10
-    dmin = min(data)
-    dmin -= dmin * 0.10
-    dlen = dmax - dmin
-    partlen = math.ceil(dlen / npart)
-    partition = math.ceil(dmin)
-    for c in range(npart):
-        sets.append(
-            FuzzySet.FuzzySet(prefix + str(c), Membership.gaussmf, [partition, partlen/3],
-                     partition))
-        partition += partlen
-
-    return sets
+        return sets
diff --git a/partitioners/Huarng.py b/partitioners/Huarng.py
index 491e752..bd2a2ac 100644
--- a/partitioners/Huarng.py
+++ b/partitioners/Huarng.py
@@ -7,31 +7,37 @@ from pyFTS.common import FuzzySet, Membership, Transformations
 
 # K. H. Huarng, “Effective lengths of intervals to improve forecasting in fuzzy time series,”
 # Fuzzy Sets Syst., vol. 123, no. 3, pp. 387–394, Nov. 2001.
+from pyFTS.partitioners import partitioner
 
-def GridPartitionerTrimf(data, prefix="A"):
-    data2 = Transformations.differential(data)
-    davg = np.abs( np.mean(data2) / 2 )
 
-    if davg <= 1.0:
-        base = 0.1
-    elif 1 < davg <= 10:
-        base = 1.0
-    elif 10 < davg <= 100:
-        base = 10
-    else:
-        base = 100
+class HuarngPartitioner(partitioner.Partitioner):
+    def __init__(self, npart,data,func = Membership.trimf):
+        super(HuarngPartitioner, self).__init__("Huarng",data,npart,func)
 
-    sets = []
-    dmax = max(data)
-    dmax += dmax * 0.10
-    dmin = min(data)
-    dmin -= dmin * 0.10
-    dlen = dmax - dmin
-    npart = math.ceil(dlen / base)
-    partition = math.ceil(dmin)
-    for c in range(npart):
-        sets.append(
-            FuzzySet.FuzzySet(prefix + str(c), Membership.trimf, [partition - base, partition, partition + base], partition))
-        partition += base
+    def build(self, data):
+        data2 = Transformations.differential(data)
+        davg = np.abs( np.mean(data2) / 2 )
 
-    return sets
+        if davg <= 1.0:
+            base = 0.1
+        elif 1 < davg <= 10:
+            base = 1.0
+        elif 10 < davg <= 100:
+            base = 10
+        else:
+            base = 100
+
+        sets = []
+        dmax = max(data)
+        dmax += dmax * 0.10
+        dmin = min(data)
+        dmin -= dmin * 0.10
+        dlen = dmax - dmin
+        npart = math.ceil(dlen / base)
+        partition = math.ceil(dmin)
+        for c in range(npart):
+            sets.append(
+                FuzzySet.FuzzySet(self.prefix + str(c), Membership.trimf, [partition - base, partition, partition + base], partition))
+            partition += base
+
+        return sets
diff --git a/partitioners/partitioner.py b/partitioners/partitioner.py
new file mode 100644
index 0000000..e9b45d2
--- /dev/null
+++ b/partitioners/partitioner.py
@@ -0,0 +1,38 @@
+from pyFTS.common import FuzzySet, Membership
+import  numpy as np
+
+class Partitioner(object):
+    def __init__(self,name,data,npart,func = Membership.trimf, names=None, prefix="A"):
+        self.name = name
+        self.partitions = npart
+        self.sets = []
+        self.membership_function = func
+        self.setnames = names
+        self.prefix = prefix
+        _min = min(data)
+        if _min < 0:
+            self.min = _min * 1.1
+        else:
+            self.min = _min * 0.9
+
+        _max = max(data)
+        if _max > 0:
+            self.max = _max * 1.1
+        else:
+            self.max = _max * 0.9
+        self.sets = self.build(data)
+
+    def build(self,data):
+        pass
+
+    def plot(self,ax):
+        ax.set_title(self.name)
+        ax.set_ylim([0, 1])
+        ax.set_xlim([self.min, self.max])
+        for s in self.sets:
+            if s.mf == Membership.trimf:
+                ax.plot([s.parameters[0], s.parameters[1], s.parameters[2]], [0, 1, 0])
+            elif s.mf == Membership.gaussmf:
+                tmpx = [kk for kk in np.arange(s.lower, s.upper)]
+                tmpy = [s.membership(kk) for kk in np.arange(s.lower, s.upper)]
+                ax.plot(tmpx, tmpy)
\ No newline at end of file
diff --git a/pwfts.py b/pwfts.py
index 2c4db5e..805bb30 100644
--- a/pwfts.py
+++ b/pwfts.py
@@ -43,8 +43,8 @@ class ProbabilisticWeightedFLRG(hofts.HighOrderFLRG):
 
 class ProbabilisticWeightedFTS(ifts.IntervalFTS):
     def __init__(self, name):
-        super(ProbabilisticWeightedFTS, self).__init__("PFTS")
-        self.shortname = "PFTS " + name
+        super(ProbabilisticWeightedFTS, self).__init__("PWFTS")
+        self.shortname = "PWFTS " + name
         self.name = "Probabilistic FTS"
         self.detail = "Silva, P.; Guimarães, F.; Sadaei, H."
         self.flrgs = {}
diff --git a/sadaei.py b/sadaei.py
index 4be9efd..1258f4e 100644
--- a/sadaei.py
+++ b/sadaei.py
@@ -2,7 +2,7 @@ import numpy as np
 from pyFTS.common import FuzzySet,FLR
 from pyFTS import fts
 
-class ExponentialyWeightedFLRG:
+class ExponentialyWeightedFLRG(object):
     def __init__(self, LHS, c):
         self.LHS = LHS
         self.RHS = []
@@ -31,6 +31,9 @@ class ExponentialyWeightedFLRG:
             cc = cc + 1
         return tmp + tmp2
 
+    def __len__(self):
+        return len(self.RHS)
+
 
 class ExponentialyWeightedFTS(fts.FTS):
     def __init__(self, name):
diff --git a/sfts.py b/sfts.py
index c49cf30..1688930 100644
--- a/sfts.py
+++ b/sfts.py
@@ -21,6 +21,9 @@ class SeasonalFLRG(FLR.FLR):
             tmp2 = tmp2 + c.name
         return tmp + tmp2
 
+    def __len__(self):
+        return len(self.RHS)
+
 
 class SeasonalFTS(fts.FTS):
     def __init__(self, name):
diff --git a/tests/general.py b/tests/general.py
new file mode 100644
index 0000000..81b10f2
--- /dev/null
+++ b/tests/general.py
@@ -0,0 +1,31 @@
+#!/usr/bin/python
+# -*- coding: utf8 -*-
+
+import os
+import numpy as np
+import pandas as pd
+import matplotlib as plt
+import matplotlib.pyplot as plt
+from mpl_toolkits.mplot3d import Axes3D
+
+import pandas as pd
+from pyFTS.partitioners import Grid, Entropy, FCM
+from pyFTS.common import FLR,FuzzySet,Membership,Transformations
+from pyFTS import fts,hofts,ifts,pwfts,tree, chen
+from pyFTS.benchmarks import benchmarks as bchmk
+from pyFTS.benchmarks import Measures
+from numpy import random
+
+#print(FCM.FCMPartitionerTrimf.__module__)
+
+gauss = random.normal(0,1.0,2000)
+#gauss_teste = random.normal(0,1.0,400)
+
+
+os.chdir("/home/petronio/dados/Dropbox/Doutorado/Disciplinas/AdvancedFuzzyTimeSeriesModels/")
+
+#from pyFTS.common import Util
+
+
+bchmk.sliding_window(gauss,500,train=0.7,partitioners=[Grid.GridPartitioner, FCM.FCMPartitioner, Entropy.EntropyPartitioner])
+
diff --git a/tests/sfts.py b/tests/sfts.py
index 5645b20..87d649d 100644
--- a/tests/sfts.py
+++ b/tests/sfts.py
@@ -61,4 +61,4 @@ for max_part in [10, 20, 30, 40, 50]:
             models.append(model)
             ixs.append(ix)
 
-print(bchmk.getPointStatistics(sample, models, indexers=ixs))
\ No newline at end of file
+print(bchmk.print_point_statistics(sample, models, indexers=ixs))
\ No newline at end of file
diff --git a/yu.py b/yu.py
index 42f2706..5464b58 100644
--- a/yu.py
+++ b/yu.py
@@ -32,7 +32,7 @@ class WeightedFLRG(fts.FTS):
 
 class WeightedFTS(fts.FTS):
     def __init__(self, name):
-        super(WeightedFTS, self).__init__(1, "WFTS")
+        super(WeightedFTS, self).__init__(1, "WFTS " + name)
         self.name = "Weighted FTS"
         self.detail = "Yu"