如何控制「汽車」包的散點圖功能中的圖例框大小及其元素（例如文本大小）？

Question

可以有人建議我如何控制汽車包的散點圖功能中的圖例框？對於我的數據集，我使用下面的命令獲得的圖例框比圖中的比例更大。

library(car) 
scatterplot(x+y ~ year|id, data = df, 
     reg = F, log = "y", legend.coords = "bottomright", cex = 0.7) 

我的數據是

> df 
    year  id   x   y 
1 1991 IDN_MYS 11437744 2774605 
2 1992 IDN_MYS 8943531 34206880 
3 1993 IDN_MYS 12198708 99868773 
4 1994 IDN_MYS 38682942 87117483 
5 1995 IDN_MYS 34296437 105040113 
6 1996 IDN_MYS 51821888 112274280 
7 1997 IDN_MYS 70006229 74435308 
8 1998 IDN_MYS 127004193 46872739 
9 1999 IDN_MYS 62566372 23214132 
10 2000 IDN_MYS 289045135 62313636 
11 2001 IDN_MYS 229997303 57084941 
12 2002 IDN_MYS 279365245 76471563 
13 2003 IDN_MYS 312307349 81738843 
14 2004 IDN_MYS 343559119 138253636 
15 2005 IDN_MYS 471477298 140554543 
16 2006 IDN_MYS 455329809 139719247 
17 2007 IDN_MYS 401328444 176776471 
18 2008 IDN_MYS 565098964 624252516 
19 2009 IDN_MYS 473096168 439215785 
20 2010 IDN_MYS 599996117 740172389 
21 2011 IDN_MYS 716575345 896620515 
22 2012 IDN_MYS 788423299 1019096755 
23 1996 PHL_MYS 549983467 213103928 
24 1997 PHL_MYS 439449916 357070365 
25 1998 PHL_MYS 931142627 411497229 
26 1999 PHL_MYS 1255531969 387415600 
27 2000 PHL_MYS 1152540687 618425906 
28 2001 PHL_MYS 770483540 444234081 
29 2002 PHL_MYS 1265422714 837094577 
30 2003 PHL_MYS 1993114374 756890867 
31 2004 PHL_MYS 1603033289 1014553499 
32 2005 PHL_MYS 1694810322 668611570 
33 2006 PHL_MYS 1573916299 887877892 
34 2007 PHL_MYS 1300465702 864579934 
35 2008 PHL_MYS 821082794 601184705 
36 2009 PHL_MYS 472922751 434354451 
37 2010 PHL_MYS 185357639 633218667 
38 2011 PHL_MYS 200507062 266285496 
39 2012 PHL_MYS 393501169 567367958 
40 1991 IDN_PHL  28447  250090 
41 1992 IDN_PHL  190776  101914 
42 1993 IDN_PHL  58302 1335777 
43 1994 IDN_PHL  87137 2060608 
44 1995 IDN_PHL 1850229  931570 
45 1996 IDN_PHL 3644638 2160783 
46 1997 IDN_PHL 29971288 3152450 
47 1998 IDN_PHL 19238811 1164557 
48 1999 IDN_PHL 45561556 10196835 
49 2000 IDN_PHL 90547227 22258828 
50 2001 IDN_PHL 69838301 7199140 
51 2002 IDN_PHL 95666176 14672929 
52 2003 IDN_PHL 112501700 21867852 
53 2004 IDN_PHL 109084814 38960824 
54 2005 IDN_PHL 138664527 56658947 
55 2006 IDN_PHL 125767320 25394112 
56 2007 IDN_PHL 207796585 30196264 
57 2008 IDN_PHL 316269770 213803274 
58 2009 IDN_PHL 334796270 128378781 
59 2010 IDN_PHL 559649987 177062428 
60 2011 IDN_PHL 591243237 233786671 
61 2012 IDN_PHL 621525781 211074568 
62 1991 IDN_SGP 111331217 106837577 
63 1992 IDN_SGP 200168757 93172782 
64 1993 IDN_SGP 369577514 176230513 
65 1994 IDN_SGP 724396934 160347397 
66 1995 IDN_SGP 859375579 232592106 
67 1996 IDN_SGP 1053938233 209213186 
68 1997 IDN_SGP 992362148 240561721 
69 1998 IDN_SGP 837762374 129096919 
70 1999 IDN_SGP 1237983442 150479574 
71 2000 IDN_SGP 1884383174 172757104 
72 2001 IDN_SGP 1496665235 167477393 
73 2002 IDN_SGP 1479084168 172725784 
74 2003 IDN_SGP 1731257432 151655786 
75 2004 IDN_SGP 1699137343 204201123 
76 2005 IDN_SGP 2467031469 284016205 
77 2006 IDN_SGP 2275585685 265739398 
78 2007 IDN_SGP 2161770346 328938399 
79 2008 IDN_SGP 2146608437 3150499289 
80 2009 IDN_SGP 1571218299 2133235054 
81 2010 IDN_SGP 2372797621 2626231916 
82 2011 IDN_SGP 2754312146 2740425339 
83 2012 IDN_SGP 2701556151 2451688915 
84 1991 MYS_SGP 85321250 76391376 
85 1993 MYS_SGP 102928625 112192464 
86 1994 MYS_SGP 141788962 122642426 
87 1995 MYS_SGP 167470600 122437307 
88 1996 MYS_SGP 158946161 100285623 
89 1997 MYS_SGP 2156717371 2232542905 
90 1998 MYS_SGP 1913041719 1995282281 
91 1999 MYS_SGP 806513802 967322242 
92 2000 MYS_SGP 871129661 1046264147 
93 2001 MYS_SGP 638170363 733835658 
94 2002 MYS_SGP 612926344 741803018 
95 2003 MYS_SGP 830731960 740708203 
96 2004 MYS_SGP 7508222782 3526815135 
97 2005 MYS_SGP 7874168269 4064855561 
98 2006 MYS_SGP 9189427786 4648990581 
99 2007 MYS_SGP 3772131014 2526345820 
100 2008 MYS_SGP 2764991070 2480646122 
101 2009 MYS_SGP 2661743660 2216756423 
102 2010 MYS_SGP 4664322857 3242487021 
103 2011 MYS_SGP 4980172900 4252241858 
104 2012 MYS_SGP 3839690439 3712060524 
105 1996 PHL_SGP 837610701 414819289 
106 1997 PHL_SGP 1104938914 622262905 
107 1998 PHL_SGP 1310047928 525549312 
108 1999 PHL_SGP 1861189682 591011046 
109 2000 PHL_SGP 2342945398 977510027 
110 2001 PHL_SGP 1694469905 914255876 
111 2002 PHL_SGP 1906445571 1080698868 
112 2003 PHL_SGP 1765768520 1214806039 
113 2004 PHL_SGP 1803823032 1525976047 
114 2005 PHL_SGP 1867147463 1438535823 
115 2006 PHL_SGP 2189432899 1540267238 
116 2007 PHL_SGP 1947116494 2532441282 
117 2008 PHL_SGP 1389989850 2351075257 
118 2009 PHL_SGP 1860741791 1277515268 
119 2010 PHL_SGP 1032873170 1677221157 
120 2011 PHL_SGP 1453386627 804526148 
121 2012 PHL_SGP 3181769066 1488345868 
122 1991 IDN_THA 2140771 13705007 
123 1992 IDN_THA 3187459 8238929 
124 1993 IDN_THA 4522221 18438515 
125 1994 IDN_THA 15964978 20468019 
126 1995 IDN_THA 29973720 29684871 
127 1996 IDN_THA 43793727 59862242 
128 1997 IDN_THA 52517486 36806490 
129 1998 IDN_THA 50158763 10171907 
130 1999 IDN_THA 77506279 15441506 
131 2000 IDN_THA 138271465 77898164 
132 2001 IDN_THA 138479659 99650501 
133 2002 IDN_THA 168933278 167551562 
134 2003 IDN_THA 230749188 333490268 
135 2004 IDN_THA 352507276 673490261 
136 2005 IDN_THA 365938735 933081200 
137 2006 IDN_THA 352808090 775750111 
138 2007 IDN_THA 401339501 980019932 
139 2008 IDN_THA 576939213 1895591254 
140 2009 IDN_THA 478071439 1123711689 
141 2010 IDN_THA 764442260 2139028565 
142 2011 IDN_THA 815339722 2923520295 
143 2012 IDN_THA 1424049780 3323590714 
144 1991 MYS_THA 2468294 2477877 
145 1992 MYS_THA 4271707 4278919 
146 1993 MYS_THA 3945514 8354463 
147 1994 MYS_THA 7018894 9345858 
148 1995 MYS_THA 16031863 7703535 
149 1996 MYS_THA 21703443 8364449 
150 1997 MYS_THA 216105303 421718141 
151 1998 MYS_THA 192242613 291695740 
152 1999 MYS_THA 202199887 282542761 
153 2000 MYS_THA 330644181 335800886 
154 2001 MYS_THA 347658354 344837915 
155 2002 MYS_THA 575998103 366711107 
156 2003 MYS_THA 393448317 419190822 
157 2004 MYS_THA 1394809514 1464170016 
158 2005 MYS_THA 1245886723 1740648388 
159 2006 MYS_THA 1415834408 1950525442 
160 2007 MYS_THA 840306185 1445242868 
161 2008 MYS_THA 1138789586 1902945473 
162 2009 MYS_THA 1170828145 1929917005 
163 2010 MYS_THA 1307287187 2865034688 
164 2011 MYS_THA 1274878221 2611106076 
165 2012 MYS_THA 1544870185 2842557647 
166 1996 PHL_THA 137253990 68177095 
167 1997 PHL_THA 175664673 127278929 
168 1998 PHL_THA 162187945 156879200 
169 1999 PHL_THA 287133506 145406083 
170 2000 PHL_THA 462123957 203379338 
171 2001 PHL_THA 463842716 191143666 
172 2002 PHL_THA 528406424 364431743 
173 2003 PHL_THA 519291379 616732520 
174 2004 PHL_THA 671229176 683825235 
175 2005 PHL_THA 642038953 724811281 
176 2006 PHL_THA 567342165 938688336 
177 2007 PHL_THA 526155022 726385210 
178 2008 PHL_THA 636726655 841035044 
179 2009 PHL_THA 467039548 911615064 
180 2010 PHL_THA 731990688 1308429373 
181 2011 PHL_THA 629375098 682891424 
182 2012 PHL_THA 1554349870 1113062087 
183 1991 SGP_THA 10885224 14434356 
184 1992 SGP_THA 13301933 18519681 
185 1993 SGP_THA 17527631 30896302 
186 1994 SGP_THA 27186774 31598410 
187 1995 SGP_THA 39201011 22036473 
188 1996 SGP_THA 42795153 20493725 
189 1997 SGP_THA 46804207 20810049 
190 1998 SGP_THA 28287459 19933156 
191 1999 SGP_THA 271462441 118264500 
192 2000 SGP_THA 1723827912 1095006316 
193 2001 SGP_THA 1552028188 912616596 
194 2002 SGP_THA 1741408148 1115064328 
195 2003 SGP_THA 2559196286 1858716114 
196 2004 SGP_THA 3125629156 2074432347 
197 2005 SGP_THA 3534766631 2065086462 
198 2006 SGP_THA 3301643703 2175621248 
199 2007 SGP_THA 1295593122 902245386 
200 2008 SGP_THA 1424818080 989979788 
201 2009 SGP_THA 1040654297 759087095 
202 2010 SGP_THA 1196212750 870255138 
203 2011 SGP_THA 1252195900 703173938 
204 2012 SGP_THA 215978470 109490987 
205 1993 IDN_VNM  323608  5924 
206 1995 IDN_VNM  77036  58448 
207 1996 IDN_VNM 1389526  275001 
208 1997 IDN_VNM  293601 5046313 
209 1998 IDN_VNM 1987282  75197 
210 1999 IDN_VNM  983189  371569 
211 2000 IDN_VNM 4140480  137160 
212 2001 IDN_VNM 4284367 1671176 
213 2002 IDN_VNM 7737052 1516206 
214 2003 IDN_VNM 16951627 2554513 
215 2004 IDN_VNM 46395314 3911078 
216 2005 IDN_VNM 64741409 7865052 
217 2006 IDN_VNM 125423755 8309694 
218 2007 IDN_VNM 111314828 10359260 
219 2008 IDN_VNM 154163948 40498944 
220 2009 IDN_VNM 116038617 75212900 
221 2010 IDN_VNM 113561781 77692878 
222 2011 IDN_VNM 150702019 126604098 
223 2012 IDN_VNM 224982660 122391042 
224 1997 MYS_VNM 30144156 7913068 
225 1998 MYS_VNM 84640626 6671372 
226 1999 MYS_VNM 55829650 5056846 
227 2000 MYS_VNM 75951596 6084615 
228 2001 MYS_VNM 19596593 4614169 
229 2002 MYS_VNM 34578033 6226961 
230 2003 MYS_VNM 40798458 9740543 
231 2004 MYS_VNM 67420147 23111748 
232 2005 MYS_VNM 64953133 20362987 
233 2006 MYS_VNM 77165313 25546626 
234 2007 MYS_VNM 136490949 42663540 
235 2008 MYS_VNM 140692752 45481847 
236 2009 MYS_VNM 108173172 70128670 
237 2010 MYS_VNM 291976224 126513276 
238 2011 MYS_VNM 301534014 343877802 
239 2012 MYS_VNM 390141547 779085608 
240 1996 PHL_VNM  959311 26149104 
241 1997 PHL_VNM 1192118 130437626 
242 1998 PHL_VNM 4310119 196834190 
243 1999 PHL_VNM 1836874 43147782 
244 2000 PHL_VNM  476663  907483 
245 2001 PHL_VNM 2689326 135383002 
246 2002 PHL_VNM 1826093 114998138 
247 2003 PHL_VNM 6808062 132974547 
248 2004 PHL_VNM 31182773 175702949 
249 2005 PHL_VNM 25761849 176135394 
250 2006 PHL_VNM 38810899 98909296 
251 2007 PHL_VNM 43719869 87381077 
252 2008 PHL_VNM 53667853 56194466 
253 2009 PHL_VNM 41153612 38097737 
254 2010 PHL_VNM 74189476 57676747 
255 2011 PHL_VNM 146845059 64167991 
256 2012 PHL_VNM 120151210 59638781 
257 1997 SGP_VNM 8060072 2600160 
258 1998 SGP_VNM 1209034  42116 
259 1999 SGP_VNM 27125282  706523 
260 2000 SGP_VNM 147698509 17401640 
261 2001 SGP_VNM 113376942 14875786 
262 2002 SGP_VNM 125533288 21347946 
263 2003 SGP_VNM 185391885 41694070 
264 2004 SGP_VNM 247668686 55761527 
265 2005 SGP_VNM 303272984 50896968 
266 2006 SGP_VNM 420135025 51485979 
267 2007 SGP_VNM 239439988 42562198 
268 2008 SGP_VNM 392688720 77730844 
269 2009 SGP_VNM 293104237 101637444 
270 2010 SGP_VNM 380838132 140924699 
271 2011 SGP_VNM 506546411 245321530 
272 2012 SGP_VNM 99698644 45997624 
273 1994 THA_VNM 13725761  309243 
274 1995 THA_VNM  398504  57388 
275 1996 THA_VNM 2895880 7419160 
276 1997 THA_VNM 1990150 134537513 
277 1998 THA_VNM 6081248 174528771 
278 1999 THA_VNM 55049996 164882260 
279 2000 THA_VNM 140617357 203560997 
280 2001 THA_VNM 96488254 169326211 
281 2002 THA_VNM 110053328 84673727 
282 2003 THA_VNM 120661225 137308864 
283 2004 THA_VNM 152581213 214213301 
284 2005 THA_VNM 217110782 227155786 
285 2006 THA_VNM 237419798 82152020 
286 2007 THA_VNM 403468759 131883212 
287 2008 THA_VNM 545576906 160572811 
288 2009 THA_VNM 590470215 223879429 
289 2010 THA_VNM 616222294 382399594 
290 2011 THA_VNM 807938367 539802245 
291 2012 THA_VNM 487517628 242259411 

Answer 1

我會用legend.plot = F覆蓋scatterplot傳說的選擇，因爲它似乎受到限制，創建自己的傳奇如下

library(car) 
scatterplot(x+y ~ year|id, data = df, reg = F, log = "y", legend.plot = F) 
legend(title = "id", "bottomright", legend=unique(df$id), pch = seq_len(length(unique(df$id))), pt.cex=0.7, cex=0.7, col = seq_len(length(unique(df$id)))) 

編輯

對於多列傳奇使用ncol

library(car) 
scatterplot(x+y ~ year|id, data = df, reg = F, log = "y", legend.plot = F) 
legend(title = "id", "bottomright", legend=unique(df$id), pch = seq_len(length(unique(df$id))), pt.cex=0.7, cex=0.7, col = seq_len(length(unique(df$id))), ncol = 2)