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Modify the forward selection process of greedy algorithm #12

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Modify the forward selection process of greedy algorithm #12

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b3de781
Modify the forward selection process of greedy algorithm
Happy-zyy Oct 15, 2018
ca61760
Random selection process to remove duplicates
Happy-zyy Oct 15, 2018
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13 changes: 8 additions & 5 deletions MLFeatureSelection/sequence_selection.py
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Original file line number Diff line number Diff line change
Expand Up @@ -212,7 +212,7 @@ def _Greedy(self):
for sub, i in enumerate(col): #forward sequence selection add one each round
print(i)
print('{}/{}'.format(sub,len(col)))
selectcol = self._Startcol[:]
selectcol = self._TemplUsedFeatures[:]
selectcol.append(i)
self._validation(selectcol, str(1+sub), i, coetest = 0)
for sr, i in enumerate(self._TemplUsedFeatures[:-1]): # backward sequence selection, -2 becuase the last 2 is just selected
Expand All @@ -238,12 +238,15 @@ def _MyRandom(self,rl=[range(3,9),50]):
for t in rl[0]:
if t < len(col):
print('add {} features'.format(t))
have_selected = []
for i in range(rl[1]):
selectcol = random.sample(col, t)
recordadd = selectcol[:]
for add in self._bestfeature:
selectcol.append(add)
self._validation(selectcol, str(i), str(recordadd))
if sorted(selectcol) not in have_selected: #去重 提速
have_selected.append(sorted(selectcol))
recordadd = selectcol[:]
for add in self._bestfeature:
selectcol.append(add)
self._validation(selectcol, str(i), str(recordadd))
print('{0}{1}{2}'.format('-' * 20, 'complete random', '-' * 20))

@_reachlimit
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