Evaluation of cutoff policies for term extraction

Journal of the Brazilian Computer Society

Table 6 Precision (P), Recall (R), F-measure (F) and List Sizes using relative cutoff points

Relative	Bigrams					Trigrams
cutoff	P (%)	R (%)	F (%)	\(\mid \mathcal {EL} \mid \)	\(\mid \mathcal {EL} \cap \mathcal {RL} \mid \)	P (%)	R (%)	F (%)	\(\mid \mathcal {EL} \mid \)	\(\mid \mathcal {EL} \cap \mathcal {RL} \mid \)
points (%)
1	97	10	18	155	151	93	6	12	182	170
2	96	19	32	310	298	92	13	22	363	335
3	95	29	44	465	440	91	19	31	545	498
4	92	37	53	619	568	90	25	39	727	657
5	90	45	60	774	693	88	30	45	909	803
6	87	53	66	929	812	88	36	51	1090	954
7	85	60	70	1084	917	87	42	56	1272	1105
8	83	67	75	1239	1033	86	47	61	1454	1247
9	81	73	77	1394	1125	84	52	64	1636	1375
10	78	79	78	1549	1208	82	56	67	1817	1495
11	76	84	80	1704	1288	81	61	69	1999	1613
12	73	89	80	1858	1364	79	65	71	2181	1728
13	71	93	81	2013	1432	78	70	74	2363	1851
14	66	94	78	2168	1441	77	74	75	2544	1964
15	62	94	75	2323	1442	77	79	78	2726	2101
16	58	94	72	2478	1445	77	84	80	2908	2228
17	55	95	70	2633	1450	76	89	82	3090	2363
18	52	95	67	2788	1453	76	94	84	3271	2501
19	49	95	65	2943	1453	73	95	82	3453	2515
20	47	95	63	3097	1457	69	95	80	3635	2515
21	45	95	61	3252	1461	66	95	78	3817	2518
22	43	96	59	3407	1465	63	95	76	3998	2520
23	41	96	58	3562	1468	60	95	74	4180	2523
24	40	96	56	3717	1476	58	95	72	4362	2524
25	39	98	55	3872	1496	56	95	70	4544	2528
26	37	98	54	4027	1496	54	95	69	4725	2532
27	36	98	52	4181	1498	52	95	67	4907	2532
28	35	98	51	4336	1498	50	95	65	5089	2534
29	33	98	50	4491	1498	48	95	64	5270	2535
30	32	98	48	4646	1498	46	95	62	5452	2535