def test_ap():
''' todo-as-note: the denominator should be carefully checked when using AP@k '''
# here we assume that there five relevant documents, but the system just retrieves three of them
sys_sorted_labels = torch.Tensor([1.0, 0.0, 1.0, 0.0, 1.0])
std_sorted_labels = torch.Tensor([1.0, 1.0, 1.0, 1.0, 1.0])
ap_at_ks = torch_ap_at_ks(sys_sorted_labels.view(1, -1),
std_sorted_labels.view(1, -1),
ks=[1, 3, 5])
print(ap_at_ks.size(), ap_at_ks) # tensor([1.0000, 0.5556, 0.4533])
ap_at_k = torch_ap_at_k(sys_sorted_labels.view(1, -1),
std_sorted_labels.view(1, -1),
k=3)
print(ap_at_k.size(), ap_at_k) # tensor([1.0000, 0.5556, 0.4533])
sys_sorted_labels = torch.Tensor([1.0, 0.0, 1.0, 0.0, 1.0])
std_sorted_labels = torch.Tensor([1.0, 1.0, 1.0, 0.0, 0.0])
ap_at_ks = torch_ap_at_ks(sys_sorted_labels.view(1, -1),
std_sorted_labels.view(1, -1),
ks=[1, 3, 5])
print(ap_at_ks) # tensor([1.0000, 0.5556, 0.7556])
# here we assume that there four relevant documents, the system just retrieves four of them
sys_sorted_labels = torch.Tensor([1.0, 1.0, 0.0, 1.0, 0.0, 0.0, 1.0])
std_sorted_labels = torch.Tensor([1.0, 1.0, 1.0, 1.0, 0.0, 0.0, 0.0])
ap_at_ks = torch_ap_at_ks(sys_sorted_labels.view(1, -1),
std_sorted_labels.view(1, -1),
ks=[1, 2, 3, 5, 7])
print(ap_at_ks) # tensor([1.0000, 1.0000, 0.6667, 0.6875, 0.8304])
ap_at_k = torch_ap_at_k(sys_sorted_labels.view(1, -1),
std_sorted_labels.view(1, -1),
k=5)
print(ap_at_k) # tensor([1.0000, 1.0000, 0.6667, 0.6875, 0.8304])
print()
def cal_metric_at_ks(self,
model_id,
all_std_labels=None,
all_preds=None,
group=None,
ks=[1, 3, 5, 10]):
"""
Compute metric values with different cutoff values
:param model:
:param all_std_labels:
:param all_preds:
:param group:
:param ks:
:return:
"""
cnt = torch.zeros(1)
sum_ndcg_at_ks = torch.zeros(len(ks))
sum_nerr_at_ks = torch.zeros(len(ks))
sum_ap_at_ks = torch.zeros(len(ks))
sum_p_at_ks = torch.zeros(len(ks))
list_ndcg_at_ks_per_q = []
list_err_at_ks_per_q = []
list_ap_at_ks_per_q = []
list_p_at_ks_per_q = []
tor_all_std_labels, tor_all_preds = \
torch.from_numpy(all_std_labels.astype(np.float32)), torch.from_numpy(all_preds.astype(np.float32))
head = 0
if model_id.startswith('LightGBM'):
group = group.astype(np.int).tolist()
for gr in group:
tor_per_query_std_labels = tor_all_std_labels[head:head + gr]
tor_per_query_preds = tor_all_preds[head:head + gr]
head += gr
_, tor_sorted_inds = torch.sort(tor_per_query_preds,
descending=True)
sys_sorted_labels = tor_per_query_std_labels[tor_sorted_inds]
ideal_sorted_labels, _ = torch.sort(tor_per_query_std_labels,
descending=True)
ndcg_at_ks = torch_nDCG_at_ks(
sys_sorted_labels=sys_sorted_labels,
ideal_sorted_labels=ideal_sorted_labels,
ks=ks,
multi_level_rele=True)
list_ndcg_at_ks_per_q.append(ndcg_at_ks.numpy())
nerr_at_ks = torch_nerr_at_ks(
sys_sorted_labels=sys_sorted_labels,
ideal_sorted_labels=ideal_sorted_labels,
ks=ks,
multi_level_rele=True)
list_err_at_ks_per_q.append(nerr_at_ks.numpy())
ap_at_ks = torch_ap_at_ks(sys_sorted_labels=sys_sorted_labels,
ideal_sorted_labels=ideal_sorted_labels,
ks=ks)
list_ap_at_ks_per_q.append(ap_at_ks.numpy())
p_at_ks = torch_p_at_ks(sys_sorted_labels=sys_sorted_labels, ks=ks)
list_p_at_ks_per_q.append(p_at_ks.numpy())
sum_ndcg_at_ks = torch.add(sum_ndcg_at_ks, ndcg_at_ks)
sum_nerr_at_ks = torch.add(sum_nerr_at_ks, nerr_at_ks)
sum_ap_at_ks = torch.add(sum_ap_at_ks, ap_at_ks)
sum_p_at_ks = torch.add(sum_p_at_ks, p_at_ks)
cnt += 1
tor_avg_ndcg_at_ks = sum_ndcg_at_ks / cnt
avg_ndcg_at_ks = tor_avg_ndcg_at_ks.data.numpy()
tor_avg_nerr_at_ks = sum_nerr_at_ks / cnt
avg_nerr_at_ks = tor_avg_nerr_at_ks.data.numpy()
tor_avg_ap_at_ks = sum_ap_at_ks / cnt
avg_ap_at_ks = tor_avg_ap_at_ks.data.numpy()
tor_avg_p_at_ks = sum_p_at_ks / cnt
avg_p_at_ks = tor_avg_p_at_ks.data.numpy()
return avg_ndcg_at_ks, avg_nerr_at_ks, avg_ap_at_ks, avg_p_at_ks,\
list_ndcg_at_ks_per_q, list_err_at_ks_per_q, list_ap_at_ks_per_q, list_p_at_ks_per_q
