def static_make_solution(model, obj, engine_name, incumbents):
# INTERNAL
sol = SolveSolution(model, obj=obj, solved_by=engine_name)
for v in model.iter_variables():
# incumbent values are provided as a list with indices as positions.
incumbent_value = incumbents[v._index]
if incumbent_value:
# silently round discrete values, just as with engine solutions.
sol._set_var_value_internal(v, incumbent_value, rounding=True, do_warn_on_non_discrete=False)
return sol
def _make_solution(self, mdl, solution_handler):
# Store the results of solve in a solution object.
raw_docloud_obj = solution_handler.get_objective()
docloud_obj = mdl.round_objective_if_discrete(raw_docloud_obj)
docloud_values_by_idx, docloud_var_rcs = solution_handler.variable_results(
)
# CPLEX index to name map
# for those variables returned by CPLEX.
# all other are assumed to be zero
cloud_index_name_map = solution_handler.cplex_index_name_map()
# send an objective, a var-value dict and a string identifying the engine which solved.
docloud_values_by_vars = {}
keep_zeros = False
count_nonmatching_cloud_vars = 0
for cpx_idx, val in iteritems(docloud_values_by_idx):
if val != 0 or keep_zeros:
# first get the name from the cloud idx
dvar = self._var_by_cloud_index(
cloud_index=cpx_idx,
cloud_index_name_map=cloud_index_name_map)
if dvar:
docloud_values_by_vars[dvar] = val
else:
cloud_name = cloud_index_name_map.get(cpx_idx)
if cloud_name and cloud_name.startswith("Rgc"):
# range variables
pass
else:
# one extra variable from docloud is OK
# it represents the constant term in objective
# more than one is an issue.
if count_nonmatching_cloud_vars:
mdl.info(
"Cannot find matching variable, cloud name is {0!s}",
cloud_name)
count_nonmatching_cloud_vars += 1
sol = SolveSolution.make_engine_solution(
model=mdl,
obj=docloud_obj,
blended_obj_by_priority=[docloud_obj],
var_value_map=docloud_values_by_vars,
solved_by=self.get_name(),
solve_details=self._solve_details,
job_solve_status=self.get_solve_status())
# attributes
docloud_ct_duals, docloud_ct_slacks = solution_handler.constraint_results(
)
var_mapper = lambda idx: self._var_by_cloud_index(
idx, cloud_index_name_map)
ct_mapper = lambda idx: mdl.get_constraint_by_index(idx)
sol.store_reduced_costs(docloud_var_rcs, mapper=var_mapper)
sol.store_dual_values(docloud_ct_duals, mapper=ct_mapper)
sol.store_slack_values(docloud_ct_slacks, mapper=ct_mapper)
return sol
def make_zero_solution(self, mdl):
# return a feasible value: max of zero and the lower bound
zlb_map = {
v: self.get_var_zero_solution(v)
for v in mdl.iter_variables() if v.lb != 0
}
obj = mdl.objective_expr.constant
return SolveSolution(mdl,
obj=obj,
var_value_map=zlb_map,
solved_by=self.name) # pragma: no cover
def new_solution(self,
var_value_dict=None,
name=None,
objective_value=None,
**kwargs):
keep_zeros = kwargs.get('keep_zeros', True)
return SolveSolution(model=self._model,
obj=objective_value,
var_value_map=var_value_dict,
name=name,
keep_zeros=keep_zeros)
def new_solution(self,
var_value_dict=None,
name=None,
keep_zeros=True,
**kwargs):
rounding = kwargs.get('rounding', False)
obj = kwargs.get('objectiveValue', None)
return SolveSolution(model=self._model,
obj=obj,
var_value_map=var_value_dict,
name=name,
keep_zeros=keep_zeros,
rounding=rounding)
def new_solution(self, var_value_dict=None, name=None):
return SolveSolution(model=self._model,
var_value_map=var_value_dict,
name=name)
X.print_upper_bounds() # print upper bounds
X.initialize_mip(verbose=True)
s = X.solve_mip(log_output=True, time_limit=None, mip_start=None)
X.soltime
X.print_optimal_allocation()
for c in X.Mip.iter_constraints():
print(c)
X
# (3) with tightening bounds LP
del X
X = NNMIP(NNs, L=1000)
X.tighten_bounds_LP(upper_bound_input=[1, 1]) # tighten bounds with LP
X.print_upper_bounds() # print upper bounds
X.initialize_mip(verbose=True)
s = X.solve_mip(log_output=True, time_limit=None, mip_start=None)
X.soltime
X.print_optimal_allocation()
for c in X.Mip.iter_constraints():
print(c)
X
# (4) re-solve with a warm start
start = s.as_dict()
X = NNMIP(NNs, L=1000)
X.initialize_mip(verbose=True)
X.solve_mip(mip_start=SolveSolution(X.Mip, start))
X.x_star
X.print_optimal_allocation()
X
def fit_with_oct_mip_start(self, dataframe, dataframe2, y, warm_start):
sol = self.model(dataframe, dataframe2, y)
s = SolveSolution(sol)
i = 0
for t in self.Tb:
s.add_var_value('b_%d' % (t), warm_start[1][t])
s.add_var_value('d_%d' % (t), warm_start[2][t])
for f in self.features:
s.add_var_value('a%d_%d' % (t, f), warm_start[0][t][f])
for leaf in self.Tl:
s.add_var_value(('l_%d' % (leaf)), warm_start[3][i])
i += 1
l = 0 # indice
for leaf in self.Tl:
for k in range(len(self.classes)):
s.add_var_value('c_%d_%d' % (k, leaf), warm_start[4][l][k])
l += 1
for point in range(len(dataframe)):
ex_leaf = warm_start[5][point]
son_right = 2 * ex_leaf + 2
s.add_var_value('z_%d_%d' % (point, son_right), 1)
i = 0
j = 0
for leaf in self.Tl:
s.add_var_value('Nt_%d' % (leaf), warm_start[6][i])
i += 1
for k in range(len(self.classes)):
print(j, k)
s.add_var_value('Nkt_%d_%d' % (k, leaf), warm_start[7][j][k])
j += 1
print(s)
print(s.check_as_mip_start())
sol.add_mip_start(s)
sol.set_time_limit(30)
# mdl.parameters.mip.tolerances.mipgap(0.1)
#sol.parameters.emphasis.mip = 4
print('finding solution with OCT as MIP START:')
s = sol.solve(log_output=True)
# sol.print_solution()
train_error = 0
for leaf in self.Tl:
train_error += s.get_value('L_' + str(leaf))
train_error = train_error / self.M
print('train_error:', train_error)
# GRAPH
self.draw_graph(s)
for t in self.Tb:
self.B.append(sol.solution.get_value('b_' + str(t)))
for leaf in self.Tl:
self.l_test.append(sol.solution.get_value('l_' + str(leaf)))
for k in range(len(self.classes)):
for leaf in self.Tl:
self.C.update({(k, leaf): sol.solution.get_value('c_' + str(k) + '_' + str(leaf))})
for t in self.Tb:
A_list = []
for f in self.features:
A_list.append(sol.solution.get_value('a' + str(t) + '_' + str(f)))
self.A.append(A_list)
return sol
def warm_start_multi(self, dataframe, dataframe2, y, d, modello):
ordine_l = [0, 1, 4, 3, 10, 9, 8, 7]
ordine_r = [0, 2, 6, 5, 14, 13, 12, 11]
mm = SolveSolution(modello)
T = pow(2, (d + 1)) - 1 # nodes number
floorTb = int(floor(T / 2)) # number of branch nodes
Tb = np.arange(0, floorTb) # range branch nodes
Tl = np.arange(floorTb, T) # range leaf nodes
classes = np.unique(y.values) # possible labels of classification
lista_df = []
lista_y = []
y = pd.DataFrame(y)
lista_df.insert(0, dataframe)
lista_y.insert(0, y)
for t in range(int((len(Tb) - 1) / 2) + 1):
yy = lista_y[t]
print(yy)
df_split1 = []
df_split2 = []
y_1 = []
y_2 = []
ind = lista_y[t].index
ind_df = lista_df[t].index
mdl = self.fit_with_cart(lista_df[t], lista_df[t], lista_y[t])
cl = yy[0].unique()
cl.sort()
print(cl)
print(classes)
for f in self.features:
mm.add_var_value('a%d_%d' % (ordine_l[t], f), mdl.solution.get_value('a0_%d' % (f)))
mm.add_var_value('b_%d' % (ordine_l[t]), mdl.solution.get_value('b_0'))
mm.add_var_value('d_%d' % (ordine_l[t]), mdl.solution.get_value('d_0'))
if 2 * ordine_l[t] + 1 in Tl:
kl = classes
leaf = 2 * ordine_l[t] + 1
mm.add_var_value('Nt_%d' % leaf, mdl.solution.get_value('Nt_1'))
mm.add_var_value('l_%d' % (leaf), mdl.solution.get_value('l_1'))
for k in range(len(cl)):
print(k, cl[k], list(classes).index(cl[k]))
mm.add_var_value('c_%d_%d' % (list(classes).index(cl[k]), leaf),
mdl.solution.get_value('c_%d_1' % (k)))
mm.add_var_value('Nkt_%d_%d' % (list(classes).index(cl[k]), leaf),
mdl.solution.get_value('Nkt_%d_1' % (k)))
for k1 in range(len(cl)):
list(kl).remove(cl[k1])
# for k2 in range(len(kl)):
# mm.add_var_value('c_%d_%d'%(list(classes).index(kl[k2]), leaf), 0)
for n in range(len(lista_df[t])):
mm.add_var_value('z_%d_%d' % (n, leaf), mdl.solution.get_value('z_%d_1' % (n)))
if 2 * ordine_l[t] + 2 in Tl:
kl = classes
leaf = 2 * ordine_l[t] + 2
mm.add_var_value('Nt_%d' % leaf, mdl.solution.get_value('Nt_2'))
mm.add_var_value('l_%d' % (leaf), mdl.solution.get_value('l_2'))
for k in range(len(cl)):
mm.add_var_value('c_%d_%d' % (list(classes).index(cl[k]), leaf),
mdl.solution.get_value('c_%d_2' % (k)))
mm.add_var_value('Nkt_%d_%d' % (list(classes).index(cl[k]), leaf),
mdl.solution.get_value('Nkt_%d_2' % (k)))
for k1 in range(len(cl)):
list(kl).remove(cl[k1])
# for k2 in range(len(kl)):
# mm.add_var_value('c_%d_%d'%(list(classes).index(kl[k2]), leaf), 0)
for n in range(len(lista_df[t])):
mm.add_var_value('z_%d_%d' % (n, leaf), mdl.solution.get_value('z_%d_2' % (n)))
for i in range(len(lista_df[t])):
j = ind[i]
m = ind_df[i]
if mdl.solution.get_value('z_%d_1' % (i)) == 1:
df_split1.insert(-1, lista_df[t].loc[m])
y_1.insert(-1, lista_y[t].loc[j])
else:
df_split2.insert(-1, lista_df[t].loc[m])
y_2.insert(-1, lista_y[t].loc[j])
df_1 = pd.DataFrame(df_split1)
df_2 = pd.DataFrame(df_split2)
y_1 = pd.DataFrame(y_1)
y_2 = pd.DataFrame(y_2)
lista_df.insert(1, df_1)
lista_df.insert(2, df_2)
lista_y.insert(1, y_1)
lista_y.insert(2, y_2)
lista_df_r = []
lista_y_r = []
lista_df_r.insert(0, lista_df[0])
lista_df_r.insert(1, lista_df[-1])
lista_y_r.insert(0, lista_y[0])
lista_y_r.insert(1, lista_y[-1])
for t in range(1, int((len(Tb) - 1) / 2) + 1):
yy = lista_y_r[t]
print(yy)
df_split1 = []
df_split2 = []
y_1 = []
y_2 = []
ind = lista_y_r[t].index
ind_df = lista_df_r[t].index
mdl = self.fit_with_cart(lista_df_r[t], lista_df_r[t], lista_y_r[t])
cl = yy[0].unique()
cl.sort()
for f in self.features:
mm.add_var_value('a%d_%d' % (ordine_r[t], f), mdl.solution.get_value('a0_%d' % (f)))
mm.add_var_value('b_%d' % (ordine_r[t]), mdl.solution.get_value('b_0'))
mm.add_var_value('d_%d' % (ordine_r[t]), mdl.solution.get_value('d_0'))
if 2 * ordine_r[t] + 1 in Tl:
kl = classes
leaf = 2 * ordine_r[t] + 1
mm.add_var_value('l_%d' % (leaf), mdl.solution.get_value('l_1'))
mm.add_var_value('Nt_%d' % (leaf), mdl.solution.get_value('Nt_1'))
for k in range(len(cl)):
mm.add_var_value('c_%d_%d' % (list(classes).index(cl[k]), leaf),
mdl.solution.get_value('c_%d_1' % (k)))
mm.add_var_value('Nkt_%d_%d' % (list(classes).index(cl[k]), leaf),
mdl.solution.get_value('Nkt_%d_1' % (k)))
for k1 in range(len(cl)):
list(kl).remove(cl[k1])
# for k2 in range(len(kl)):
# mm.add_var_value('c_%d_%d'%(list(classes).index(kl[k2], leaf)), 0)
mm.add_var_value('l_%d' % (leaf), mdl.solution.get_value('l_1'))
for n in range(len(lista_df_r[t])):
mm.add_var_value('z_%d_%d' % (n, leaf), mdl.solution.get_value('z_%d_1' % (n)))
if 2 * ordine_r[t] + 2 in Tl:
kl = classes
leaf = 2 * ordine_r[t] + 2
mm.add_var_value('l_%d' % (leaf), mdl.solution.get_value('l_2'))
mm.add_var_value('Nt_%d' % (leaf), mdl.solution.get_value('Nt_2'))
for k in range(len(cl)):
mm.add_var_value('c_%d_%d' % (list(classes).index(cl[k]), leaf),
mdl.solution.get_value('c_%d_2' % (k)))
mm.add_var_value('Nkt_%d_%d' % (list(classes).index(cl[k]), leaf),
mdl.solution.get_value('Nkt_%d_2' % (k)))
for k1 in range(len(cl)):
list(kl).remove(cl[k1])
# for k2 in range(len(kl)):
# mm.add_var_value('c_%d_%d'%(list(classes).index(kl[k2]), leaf), 0)
for n in range(len(lista_df_r[t])):
mm.add_var_value('z_%d_%d' % (n, leaf), mdl.solution.get_value('z_%d_2' % (n)))
for i in range(len(lista_df_r[t])):
j = ind[i]
m = ind_df[i]
if mdl.solution.get_value('z_%d_1' % (i)) == 1:
df_split1.insert(-1, lista_df_r[t].loc[m])
y_1.insert(-1, lista_y_r[t].loc[j])
else:
df_split2.insert(-1, lista_df_r[t].loc[m])
y_2.insert(-1, lista_y_r[t].loc[j])
df_1 = pd.DataFrame(df_split1)
df_2 = pd.DataFrame(df_split2)
y_1 = pd.DataFrame(y_1)
y_2 = pd.DataFrame(y_2)
lista_df_r.insert(1, df_1)
lista_df_r.insert(2, df_2)
lista_y_r.insert(1, y_1)
lista_y_r.insert(2, y_2)
# GRAPH WARM START
g = pgv.AGraph(directed=True) # initialize the graph
nodes = np.append(Tb, Tl)
for n in nodes: # the graph has a node for eache node of the tree
g.add_node(n, shape='circle', size=8)
if n != 0:
father = ceil(n / 2) - 1
g.add_edge(father, n)
for t in Tb:
coeff = []
feat = []
# if mdl.solution.get_value('d_' + str(t))==0:
# g.get_node(t).attr['color']='red'
for f in range(len(self.features)):
if mm.get_value('a' + str(t) + '_' + str(f)) != 0:
coeff.insert(-1, '%.3f' % (mm.get_value('a' + str(t) + '_' + str(f))))
feat.insert(-1, f)
g.get_node(t).attr['label'] = str(coeff) + '*X' + str(feat) + str('<=') + str(
'%.3f' % (mm.get_value('b_' + str(t))))
for leaf in Tl:
if mm.get_value('l_' + str(leaf)) == 0: # these leaves haven't got points
g.get_node(leaf).attr['color'] = 'red'
for leaf in Tl:
s = []
for k in range(len(classes)):
s.append(round(mm.get_value('Nkt_' + str(k) + '_' + str(leaf))))
for k in range(len(classes)):
if mm.get_value('c_' + str(k) + '_' + str(leaf)) == 1:
g.get_node(leaf).attr['label'] = str(s) + '\\n' + 'class %d' % (classes[k])
g.layout(prog='dot')
g.draw('/Users/giuliaciarimboli/Desktop/warm_start.pdf')
print('la soluzione warm start:', mm)
print(mm.check_as_mip_start())
modello.add_mip_start(mm)
modello.set_time_limit(3600)
modello.solve(log_output=True)
modello.print_solution()
# GRAPH
g = pgv.AGraph(directed=True) # initialize the graph
nodes = np.append(Tb, Tl)
for n in nodes: # the graph has a node for eache node of the tree
g.add_node(n, shape='circle', size=8)
if n != 0:
father = ceil(n / 2) - 1
g.add_edge(father, n)
for t in Tb:
coeff = []
feat = []
# if mdl.solution.get_value('d_' + str(t))==0:
# g.get_node(t).attr['color']='red'
for f in range(len(self.features)):
if modello.solution.get_value('a' + str(t) + '_' + str(f)) != 0:
coeff.insert(-1, '%.3f' % (modello.solution.get_value('a' + str(t) + '_' + str(f))))
feat.insert(-1, f)
g.get_node(t).attr['label'] = str(coeff) + '*X' + str(feat) + str('<=') + str(
'%.3f' % (modello.solution.get_value('b_' + str(t))))
for leaf in Tl:
if modello.solution.get_value('l_' + str(leaf)) == 0: # these leaves haven't got points
g.get_node(leaf).attr['color'] = 'red'
for leaf in Tl:
s = []
for k in range(len(classes)):
s.append(round(modello.solution.get_value('Nkt_' + str(k) + '_' + str(leaf))))
for k in range(len(classes)):
if modello.solution.get_value('c_' + str(k) + '_' + str(leaf)) == 1:
g.get_node(leaf).attr['label'] = str(s) + '\\n' + 'class %d' % (classes[k])
g.layout(prog='dot')
g.draw('/Users/giuliaciarimboli/Desktop/sol finale.pdf')
return modello
def find_cart_warmstart(self, dataframe, dataframe2, y):
mdl = self.model(dataframe, dataframe2, y)
# MIP START
clf = DecisionTreeClassifier(max_depth=self.depth, min_samples_leaf=self.Nmin, random_state=1)
clf.fit(dataframe, y)
dot_data = tree.export_graphviz(clf, out_file=None)
graph = graphviz.Source(dot_data)
# graph.render(filename="prova",directory='/Users/giuliaciarimboli/Desktop/laurea magistrale/classification trees/graphs',view=True)
sk_features = clf.tree_.feature
sk_b = clf.tree_.threshold
sk_val = clf.tree_.value
sk_z = clf.apply(df)
nodes = np.append(self.Tb, self.Tl)
idx = [0]
j = 1
left = clf.tree_.children_left
right = clf.tree_.children_right
for i in range(len(clf.tree_.children_left)):
if idx[i] >= 0:
node = idx[i]
if clf.tree_.children_left[node] > 0:
idx.insert(j, clf.tree_.children_left[node])
j += 1
if clf.tree_.children_right[node] > 0:
idx.insert(j, clf.tree_.children_right[node])
j += 1
m = SolveSolution(mdl)
count = 0
j = -1
for node in range(len(sk_features)):
j += 1
if sk_features[j] >= 0:
i = list(idx).index(
j) # prendo l'indice j-esimo della lista dei nodi di sklearn, equivalente al nodo oct
feat = sk_features[j] # è la feature da prendere nell'i esimo nodo
m.add_var_value('a%d_%d' % (i, feat), 1)
m.add_var_value(('b_%d' % (i)), sk_b[j])
count += 1
for t in self.Tb: # len(skval)
if sk_features[t] >= 0:
i = list(idx).index(t)
m.add_var_value(('d_%d' % (i)), 1)
for leaf in self.Tl:
m.add_var_value(('l_%d' % (leaf)), 1)
jj = -1
for node in idx:
jj += 1
k = np.argmax(sk_val[jj][0])
num = np.sum(sk_val[jj][0])
ii = list(idx).index(jj)
if ii in self.Tl:
m.add_var_value('c_%d_%d' % (k, ii), 1)
m.add_var_value('Nt_%d' % (ii), num)
for kl in range(len(self.classes)):
m.add_var_value('Nkt_%d_%d' % (kl, ii), sk_val[jj][0][kl])
missing = len(np.append(self.Tb, self.Tl)) - len(idx)
for data in range(len(dataframe)):
foglia = list(idx).index(sk_z[data]) + missing
m.add_var_value('z_%d_%d' % (data, foglia), 1)
print(m.check_as_mip_start())
print(m)
mdl.add_mip_start(m)
return mdl
def warm_start_univariate(self, dataframe, y, univariate):
print('risolvo il modello OCT')
univariate.solve()
mdl = self.model(dataframe, dataframe, y)
m = SolveSolution(mdl)
points = np.arange(0, len(dataframe))
for t in self.Tb:
for f in self.features:
m.add_var_value(
'a' + str(t) + '_' + str(f),
univariate.solution.get_value('a' + str(t) + '_' + str(f)))
m.add_var_value(
'a_hat' + str(t) + '_' + str(f),
univariate.solution.get_value('a' + str(t) + '_' + str(f)))
m.add_var_value(
's' + str(t) + '_' + str(f),
univariate.solution.get_value('a' + str(t) + '_' + str(f)))
for t in self.Tb:
m.add_var_value('b_' + str(t),
univariate.solution.get_value('b_' + str(t)))
m.add_var_value('d_' + str(t),
univariate.solution.get_value('d_' + str(t)))
for leaf in self.Tl:
m.add_var_value('l_' + str(leaf),
univariate.solution.get_value('l_' + str(leaf)))
m.add_var_value('Nt_' + str(leaf),
univariate.solution.get_value('Nt_' + str(leaf)))
m.add_var_value('L_' + str(leaf),
univariate.solution.get_value('L_' + str(leaf)))
for k in range(len(self.classes)):
m.add_var_value(
'c_' + str(k) + '_' + str(leaf),
univariate.solution.get_value('c_' + str(k) + '_' +
str(leaf)))
m.add_var_value(
'Nkt_' + str(k) + '_' + str(leaf),
univariate.solution.get_value('Nkt_' + str(k) + '_' +
str(leaf)))
for n in points:
for leaf in self.Tl:
m.add_var_value(
'z_' + str(n) + '_' + str(leaf),
univariate.solution.get_value('z_' + str(n) + '_' +
str(leaf)))
mdl.add_mip_start(m)
mdl.solve(log_output=True)
return mdl
def warm_start(self, dataframe, y, d, modello):
ordine_l = [0, 1, 4, 3, 10, 9, 8, 6, 22, 21, 20, 19, 18, 17, 16, 15]
ordine_r = [0, 2, 6, 5, 14, 13, 12, 11, 20, 29, 28, 27, 26, 25, 24, 23]
mm = SolveSolution(modello)
T = pow(2, (d + 1)) - 1 # nodes number
floorTb = int(floor(T / 2)) # number of branch nodes
Tb = np.arange(0, floorTb) # range branch nodes
Tl = np.arange(floorTb, T) # range leaf nodes
classes = np.unique(y.values) # possible labels of classification
lista_leaf = []
lista_df = []
lista_y = []
y = pd.DataFrame(y)
lista_df.insert(0, dataframe)
lista_y.insert(0, y)
for t in range(int((len(Tb) - 1) / 2) + 1):
yy = lista_y[t]
df_split1 = []
df_split2 = []
y_1 = []
y_2 = []
ind = lista_y[t].index
ind_df = lista_df[t].index
if len(lista_y[t]) > self.Nmin:
'''for f in self.features:
mm.add_var_value('a%d_%d' % (ordine_l[t], f), 0)
mm.add_var_value('a_hat%d_%d' % (ordine_l[t], f), 0)
mm.add_var_value('b_%d' % (ordine_l[t]), 0)
mm.add_var_value('d_%d' % (ordine_l[t]), 0)
if 2 * ordine_l[t] + 1 in Tl:
leaf = 2 * ordine_l[t] + 1
for l in range(leaf, leaf + 2):
mm.add_var_value('Nt_%d' % l, 0)
mm.add_var_value('l_%d' % l, 0)
for k in range(len(classes)):
mm.add_var_value('c_%d_%d' % (k, l),
0)
mm.add_var_value('Nkt_%d_%d' % (k, l),
0)
for n in range(0, len(dataframe)):
mm.add_var_value('z_%d_%d' % (n, l), 0)
lista_df.insert(1, df_1)
lista_df.insert(2, df_2)
lista_y.insert(1, y_1)
lista_y.insert(2, y_2)
else:'''
mdl = self.fit_with_cart(lista_df[t], lista_y[t])
cl = yy[9].unique()
cl.sort()
for f in self.features:
mm.add_var_value('a%d_%d' % (ordine_l[t], f),
mdl.solution.get_value('a0_%d' % f))
mm.add_var_value('a_hat%d_%d' % (ordine_l[t], f),
mdl.solution.get_value('a_hat0_%d' % f))
mm.add_var_value('b_%d' % (ordine_l[t]),
mdl.solution.get_value('b_0'))
mm.add_var_value('d_%d' % (ordine_l[t]),
mdl.solution.get_value('d_0'))
if 2 * ordine_l[t] + 1 in Tl:
leaf = 2 * ordine_l[t] + 1
mm.add_var_value('Nt_%d' % leaf,
mdl.solution.get_value('Nt_1'))
mm.add_var_value('l_%d' % (leaf),
mdl.solution.get_value('l_1'))
for k in range(len(cl)):
mm.add_var_value(
'c_%d_%d' % (list(classes).index(cl[k]), leaf),
mdl.solution.get_value('c_%d_1' % (k)))
mm.add_var_value(
'Nkt_%d_%d' % (list(classes).index(cl[k]), leaf),
mdl.solution.get_value('Nkt_%d_1' % (k)))
kl = list(set(classes) - set(cl))
for k2 in range(len(kl)):
mm.add_var_value(
'c_%d_%d' % (list(classes).index(kl[k2]), leaf), 0)
mm.add_var_value(
'Nkt_%d_%d' % (list(classes).index(kl[k2]), leaf),
0)
for n in range(len(lista_df[t])):
mm.add_var_value('z_%d_%d' % (ind_df[n], leaf),
mdl.solution.get_value('z_%d_1' % n))
ind_miss = list(
set(ind_df) -
set(list(np.array(np.arange(0, len(dataframe))))))
for n in ind_miss:
mm.add_var_value('z_%d_%d' % (n, leaf), 0)
if 2 * ordine_l[t] + 2 in Tl:
leaf = 2 * ordine_l[t] + 2
mm.add_var_value('Nt_%d' % leaf,
mdl.solution.get_value('Nt_2'))
mm.add_var_value('l_%d' % (leaf),
mdl.solution.get_value('l_2'))
for k in range(len(cl)):
mm.add_var_value(
'c_%d_%d' % (list(classes).index(cl[k]), leaf),
mdl.solution.get_value('c_%d_2' % k))
mm.add_var_value(
'Nkt_%d_%d' % (list(classes).index(cl[k]), leaf),
mdl.solution.get_value('Nkt_%d_2' % k))
kl = list(set(classes) - set(cl))
for k2 in range(len(kl)):
mm.add_var_value(
'c_%d_%d' % (list(classes).index(kl[k2]), leaf), 0)
mm.add_var_value(
'Nkt_%d_%d' % (list(classes).index(kl[k2]), leaf),
0)
for n in range(len(lista_df[t])):
mm.add_var_value(
'z_%d_%d' % (ind_df[n], leaf),
mdl.solution.get_value('z_%d_2' % (n)))
ind_miss = list(
set(list(np.array(np.arange(0, len(dataframe))))) -
set(ind_df))
for n in ind_miss:
mm.add_var_value('z_%d_%d' % (n, leaf), 0)
for i in range(len(lista_df[t])):
j = ind[i]
m = ind_df[i]
if mdl.solution.get_value('z_%d_1' % (i)) == 1:
df_split1.insert(-1, lista_df[t].loc[m])
y_1.insert(-1, lista_y[t].loc[j])
else:
df_split2.insert(-1, lista_df[t].loc[m])
y_2.insert(-1, lista_y[t].loc[j])
df_1 = pd.DataFrame(df_split1)
df_2 = pd.DataFrame(df_split2)
y_1 = pd.DataFrame(y_1)
y_2 = pd.DataFrame(y_2)
lista_df.insert(1, df_1)
lista_df.insert(2, df_2)
lista_y.insert(1, y_1)
lista_y.insert(2, y_2)
lista_df_r = []
lista_y_r = []
lista_df_r.insert(0, lista_df[0])
lista_df_r.insert(1, lista_df[-1])
lista_y_r.insert(0, lista_y[0])
lista_y_r.insert(1, lista_y[-1])
for t in range(1, int((len(Tb) - 1) / 2) + 1):
yy = lista_y_r[t]
df_split1 = []
df_split2 = []
y_1 = []
y_2 = []
ind = lista_y_r[t].index
ind_df = lista_df_r[t].index
if len(lista_y_r[t]) > self.Nmin:
'''for f in self.features:
mm.add_var_value('a%d_%d' % (ordine_l[t], f), 0)
mm.add_var_value('a_hat%d_%d' % (ordine_l[t], f), 0)
mm.add_var_value('b_%d' % (ordine_l[t]), 0)
mm.add_var_value('d_%d' % (ordine_l[t]), 0)
if 2 * ordine_l[t] + 1 in Tl:
leaf = 2 * ordine_l[t] + 1
for l in range(leaf, leaf + 2):
print(l)
mm.add_var_value('Nt_%d' % l, 0)
mm.add_var_value('l_%d' % l, 0)
for k in range(len(classes)):
mm.add_var_value('c_%d_%d' % (k, l),
0)
mm.add_var_value('Nkt_%d_%d' % (k, l),
0)
for n in range(0, len(dataframe)):
mm.add_var_value('z_%d_%d' % (n, l), 0)
lista_df_r.insert(1, df_1)
lista_df_r.insert(2,df_2)
lista_y_r.insert(1, y_1)
lista_y_r.insert(2, y_2)
else:'''
mdl = self.fit_with_cart(lista_df_r[t], lista_y_r[t])
cl = yy[9].unique()
cl.sort()
for f in self.features:
mm.add_var_value('a%d_%d' % (ordine_r[t], f),
mdl.solution.get_value('a0_%d' % (f)))
mm.add_var_value('a_hat%d_%d' % (ordine_r[t], f),
mdl.solution.get_value('a_hat0_%d' % (f)))
mm.add_var_value('b_%d' % (ordine_r[t]),
mdl.solution.get_value('b_0'))
mm.add_var_value('d_%d' % (ordine_r[t]),
mdl.solution.get_value('d_0'))
if 2 * ordine_r[t] + 1 in Tl:
leaf = 2 * ordine_r[t] + 1
mm.add_var_value('l_%d' % (leaf),
mdl.solution.get_value('l_1'))
mm.add_var_value('Nt_%d' % (leaf),
mdl.solution.get_value('Nt_1'))
for k in range(len(cl)):
mm.add_var_value(
'c_%d_%d' % (list(classes).index(cl[k]), leaf),
mdl.solution.get_value('c_%d_1' % (k)))
mm.add_var_value(
'Nkt_%d_%d' % (list(classes).index(cl[k]), leaf),
mdl.solution.get_value('Nkt_%d_1' % (k)))
kl = list(set(classes) - set(cl))
for k2 in range(len(kl)):
mm.add_var_value(
'c_%d_%d' % (list(classes).index(kl[k2]), leaf), 0)
mm.add_var_value(
'Nkt_%d_%d' % (list(classes).index(kl[k2]), leaf),
0)
mm.add_var_value('l_%d' % (leaf),
mdl.solution.get_value('l_1'))
for n in range(len(lista_df_r[t])):
mm.add_var_value('z_%d_%d' % (ind_df[n], leaf),
mdl.solution.get_value('z_%d_1' % n))
ind_miss = list(
set(ind_df) -
set(list(np.array(np.arange(0, len(dataframe))))))
for n in ind_miss:
mm.add_var_value('z_%d_%d' % (n, leaf), 0)
if 2 * ordine_r[t] + 2 in Tl:
leaf = 2 * ordine_r[t] + 2
mm.add_var_value('l_%d' % (leaf),
mdl.solution.get_value('l_2'))
mm.add_var_value('Nt_%d' % (leaf),
mdl.solution.get_value('Nt_2'))
for k in range(len(cl)):
mm.add_var_value(
'c_%d_%d' % (list(classes).index(cl[k]), leaf),
mdl.solution.get_value('c_%d_2' % k))
mm.add_var_value(
'Nkt_%d_%d' % (list(classes).index(cl[k]), leaf),
mdl.solution.get_value('Nkt_%d_2' % k))
kl = list(set(classes) - set(cl))
for k2 in range(len(kl)):
mm.add_var_value(
'c_%d_%d' % (list(classes).index(kl[k2]), leaf), 0)
mm.add_var_value(
'Nkt_%d_%d' % (list(classes).index(kl[k2]), leaf),
0)
for n in range(len(lista_df_r[t])):
mm.add_var_value(
'z_%d_%d' % (ind_df[n], leaf),
mdl.solution.get_value('z_%d_2' % (n)))
ind_miss = list(
set(ind_df) -
set(list(np.array(np.arange(0, len(dataframe))))))
for n in ind_miss:
mm.add_var_value('z_%d_%d' % (n, leaf), 0)
for i in range(len(lista_df_r[t])):
j = ind[i]
m = ind_df[i]
if mdl.solution.get_value('z_%d_1' % i) == 1:
df_split1.insert(-1, lista_df_r[t].loc[m])
y_1.insert(-1, lista_y_r[t].loc[j])
else:
df_split2.insert(-1, lista_df_r[t].loc[m])
y_2.insert(-1, lista_y_r[t].loc[j])
df_1 = pd.DataFrame(df_split1)
df_2 = pd.DataFrame(df_split2)
y_1 = pd.DataFrame(y_1)
y_2 = pd.DataFrame(y_2)
lista_df_r.insert(1, df_1)
lista_df_r.insert(2, df_2)
lista_y_r.insert(1, y_1)
lista_y_r.insert(2, y_2)
# GRAPH WARM START
g = pgv.AGraph(directed=True) # initialize the graph
nodes = np.append(Tb, Tl)
for n in nodes: # the graph has a node for eache node of the tree
g.add_node(n, shape='circle', size=8)
if n != 0:
father = ceil(n / 2) - 1
g.add_edge(father, n)
for t in Tb:
coeff = []
feat = []
# if mdl.solution.get_value('d_' + str(t))==0:
# g.get_node(t).attr['color']='red'
for f in range(len(self.features)):
if mm.get_value('a' + str(t) + '_' + str(f)) != 0:
coeff.insert(
-1, '%.3f' %
(mm.get_value('a' + str(t) + '_' + str(f))))
feat.insert(-1, f)
g.get_node(t).attr['label'] = str(coeff) + '*X' + str(
feat) + str('<=') + str('%.3f' %
(mm.get_value('b_' + str(t))))
for leaf in Tl:
if mm.get_value(
'l_' +
str(leaf)) == 0: # these leaves haven't got points
g.get_node(leaf).attr['color'] = 'red'
for leaf in Tl:
s = []
for k in range(len(classes)):
s.append(
round(mm.get_value('Nkt_' + str(k) + '_' + str(leaf))))
for k in range(len(classes)):
if mm.get_value('c_' + str(k) + '_' + str(leaf)) == 1:
g.get_node(leaf).attr['label'] = str(
s) + '\\n' + 'class %d' % (classes[k])
g.layout(prog='dot')
g.draw('/Users/giuliaciarimboli/Desktop/warm_start_LDA.pdf')
print('la soluzione warm start:', mm)
print(mm.check_as_mip_start())
modello.add_mip_start(mm)
modello.set_time_limit(900)
modello.parameters.emphasis.mip = 4
s = modello.solve(log_output=True)
modello.print_solution()
train_error = 0
for leaf in Tl:
train_error += s.get_value('L_' + str(leaf))
train_error = train_error / len(y)
print('train_error:', train_error)
a_test = [] * len(self.features)
b_test = []
c_test = []
for t in Tb:
a_list = []
b_test.insert(t, s.get_value('b_%d' % t))
for f in self.features:
a_list.insert(f, s.get_value('a%d_%d' % (t, f)))
a_test.append(a_list)
for leaf in Tl:
c_list = []
for k in range(len(classes)):
c_list.insert(leaf, s.get_value('c_%d_%d' % (k, leaf)))
c_test.append(c_list)
# GRAPH
g = pgv.AGraph(directed=True) # initialize the graph
nodes = np.append(Tb, Tl)
for n in nodes: # the graph has a node for eache node of the tree
g.add_node(n, shape='circle', size=8)
if n != 0:
father = ceil(n / 2) - 1
g.add_edge(father, n)
for t in Tb:
coeff = []
feat = []
# if mdl.solution.get_value('d_' + str(t))==0:
# g.get_node(t).attr['color']='red'
for f in range(len(self.features)):
if modello.solution.get_value('a' + str(t) + '_' +
str(f)) != 0:
coeff.insert(
-1,
'%.3f' % (modello.solution.get_value('a' + str(t) +
'_' + str(f))))
feat.insert(-1, f)
g.get_node(t).attr['label'] = str(coeff) + '*X' + str(feat) + str(
'<=') + str('%.3f' %
(modello.solution.get_value('b_' + str(t))))
for leaf in Tl:
if modello.solution.get_value(
'l_' + str(leaf)) == 0: # these leaves haven't got points
g.get_node(leaf).attr['color'] = 'red'
for leaf in Tl:
s = []
for k in range(len(classes)):
s.append(
round(
modello.solution.get_value('Nkt_' + str(k) + '_' +
str(leaf))))
for k in range(len(classes)):
if modello.solution.get_value('c_' + str(k) + '_' +
str(leaf)) == 1:
g.get_node(leaf).attr['label'] = str(
s) + '\\n' + 'class %d' % (classes[k])
g.layout(prog='dot')
g.draw('/Users/giuliaciarimboli/Desktop/solfinale_LDA.pdf')
return a_test, b_test, c_test, train_error
print([node.id for route in routes for node in route])
# the route found by the heuristic should have less or equal number of vehicle
#assert len(routes[0]) <= m
m = len(routes)
# cplex solution
f = Formulation(A, V, N, q, Q, c, m, n, 3)
f.set_formulation()
f.add_formulation_constraints()
# save initial solution as CPLEX file
value_map = utils.write_cplex_solution(routes, n)
solve_solution = SolveSolution(model=f.formulation,
var_value_map=value_map,
obj=total_cost)
solution, routes_solution = f.run_formulation(solve_solution, True)
utils.print_routes(routes_solution)
if solution is None:
new_value = {
'Instance': dataset["instance"],
'Our obj': "None",
'Paper Obj': dataset["obj"],
'Our Time': "none",
'Paper Time': dataset["time"],
'GAP': "None"
}
c = mdl.binary_var_matrix(len(classes), Tl, name='c') # class_of_leaf_%d_is_%d
L = mdl.continuous_var_list(Tl, lb=0, name='L') # loss_in_leaf
Nt = mdl.continuous_var_list(Tl, name='Nt') # points_in_leaf
Nkt = mdl.continuous_var_matrix(len(classes)+1, Tl, name='Nkt') # points_in_leaf_%d_of_class_%d
if depth==2:
idx_sk = [0,1,4,2,3,5,6]
# nodes = [0,1,2,3,4,5,6]
elif depth==3:
idx_sk =[0,1,8,2,5,9,12,3,4,6,7 ,10,11,13,14]
# nodes =[0,1,2,3,4,5, 6,7,8,9,10,11,12,13,14]
m = SolveSolution(mdl)
count = 0
j = -1
for node in idx_sk:
j += 1
if sk_features[j] >= 0:
i = list(idx_sk).index(j) # prendo l'indice j-esimo della lista dei nodi di sklearn, equivalente al nodo oct
feat = sk_features[j] # è la feature da prendere nell'i esimo nodo
m.add_var_value('a%d_%d' % (i, feat),1)
m.add_var_value(('b_%d'%(i)), sk_b[j])
count += 1
for t in Tb:
m.add_var_value(('d_%d'%(t)), 1)
for leaf in Tl:
m.add_var_value(('l_%d'%(leaf)), 1)