Evaluation of cutoff policies for term extraction

Journal of the Brazilian Computer Society

Table 4 Precision (P), recall (R), F-measure (F), and list sizes using absolute cutoff points

Absolute	Bigrams				Trigrams
cutoff	P (%)	R (%)	F (%)	\(\mid \mathcal {EL} \cap \mathcal {RL} \mid \)	P (%)	R (%)	F (%)	\(\mid \mathcal {EL} \cap \mathcal {RL} \mid \)
points
100	99	6	12	99	93	3	7	93
200	98	13	22	195	94	7	13	187
300	96	19	31	288	94	11	19	281
400	95	25	39	380	92	14	24	366
500	94	31	46	469	92	17	29	459
600	92	36	52	550	91	21	33	546
700	91	41	57	636	90	24	38	631
800	89	46	61	710	90	27	42	719
900	88	51	65	789	89	30	45	797
1000	86	56	67	855	88	33	48	879
1100	84	61	71	929	87	36	51	960
1200	83	65	73	1001	87	39	54	1045
1300	83	70	76	1074	87	42	57	1128
1400	81	74	77	1129	87	46	60	1217
1500	79	77	78	1179	85	48	61	1277
1600	77	80	79	1234	84	51	63	1350
1700	76	84	79	1285	83	53	65	1416
1800	74	87	80	1331	82	56	66	1483
1900	73	90	81	1388	81	58	68	1548
2000	72	93	81	1432	81	61	69	1614
2100	68	94	79	1437	80	63	70	1674
2200	66	94	77	1441	79	65	72	1742
2300	63	94	75	1442	79	68	73	1806
2400	60	94	73	1442	78	70	74	1875
2500	58	94	72	1447	78	73	75	1938
2600	56	94	70	1449	77	75	76	2003
2700	54	95	69	1451	77	78	78	2080
2800	52	95	67	1453	77	81	79	2154
2900	50	95	66	1453	77	84	80	2222
3000	48	95	64	1453	77	86	81	2298
3100	47	95	63	1457	76	89	82	2370
3200	46	95	62	1460	77	92	84	2449
3300	44	95	60	1462	76	94	84	2514
3400	43	95	59	1464	74	94	83	2514
3500	42	96	58	1467	72	95	82	2515