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Patch 1 #2

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d15df54
Update xgboost_explainer.py
krisjanus Feb 15, 2018
c0b9aee
Update xgboost_explainer.py
krisjanus Feb 15, 2018
acdc0aa
Update xgboost_explainer.py
krisjanus Feb 15, 2018
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10 changes: 8 additions & 2 deletions xgboost_explainer.py
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Original file line number Diff line number Diff line change
Expand Up @@ -31,7 +31,10 @@ def model2table(bst, eta=0.3, lmda=1.0):
parent = {}
parent[0] = None
lst_node_str = line.split('\n')
node_lst = [{} for _ in range(len(lst_node_str)-1)]
#---------I have found some cases where the lines in lst_node_str do not match the max node idx-----
max_node_idx = max([int(node[:node.index(":")]) for node in lst_node_str if len(node) > 0])
node_lst = [{} for _ in range(max_node_idx+1)]
#---------------------------------------------------------------------------------------------------
for node in lst_node_str:
node = node.strip()
# print("fdfdf",len(node))
Expand Down Expand Up @@ -73,12 +76,14 @@ def model2table(bst, eta=0.3, lmda=1.0):
# node_lst.append(d)
node_lst[node_idx] = d
for j, node in enumerate(node_lst):
node_lst[j]['parent'] = parent[node_lst[j]['node']]
if bool(node):
node_lst[j]['parent'] = parent[node_lst[j]['node']]
tree_lst[i] = node_lst
for t in tree_lst:
check_params(t, eta, lmda)
for j in reversed(range(len(t))):
node = t[j]
if not bool(node): continue
if node['is_leaf']:
G = -1.*node['leaf']*(node['cover']+lmda)/eta
else:
Expand All @@ -88,6 +93,7 @@ def model2table(bst, eta=0.3, lmda=1.0):
for t in tree_lst:
for j in reversed(range(len(t))):
node = t[j]
if not bool(node): continue
if node['parent'] is None:
node['logit_delta'] = node['logit'] - .0
else:
Expand Down