我使用 gvisGeoChart 从以下数据创建了一个等值区域（名为＆＃34;差异＆＃34;）：
State AIG AIG_pretty
AL 22186 AL: $22 million
AK -93065 AK: -$93 million
AZ 659601 AZ: $660 million
AR 14075 AR: $14 million
CA -1049642 CA: -$1,050 million
CO 591884 CO: $592 million
CT -187758 CT: -$188 million
DE 49474 DE: $49 million
DC 31559 DC: $32 million
FL 4928379 FL: $4,928 million
GA 150630 GA: $151 million
HI 74427 HI: $74 million
ID 149891 ID: $150 million
IL -1997777 IL: -$1,998 million
IN -258058 IN: -$258 million
IA -217530 IA: -$218 million
KS -216031 KS: -$216 million
KY -2444 KY: -$2 million
LA -53519 LA: -$54 million
ME 70622 ME: $71 million
MD -232201 MD: -$232 million
MA -536470 MA: -$536 million
MI -1052112 MI: -$1,052 million
MN -356883 MN: -$357 million
MS -45076 MS: -$45 million
MO -388473 MO: -$388 million
MT 92241 MT: $92 million
NE -111284 NE: -$111 million
NV 269201 NV: $269 million
NH 45192 NH: $45 million
NJ -1679631 NJ: -$1,680 million
NM 29605 NM: $30 million
NY -3256155 NY: -$3,256 million
NC 876272 NC: $876 million
ND 67850 ND: $68 million
OH -1262524 OH: -$1,263 million
OK 17140 OK: $17 million
OR 265561 OR: $266 million
PA -512993 PA: -$513 million
RI -132706 RI: -$133 million
SC 835055 SC: $835 million
SD 98588 SD: $99 million
TN 457846 TN: $458 million
TX 2399462 TX: $2,399 million
UT 13362 UT: $13 million
VT -2084 VT: -$2 million
VA 85946 VA: $86 million
WA 599786 WA: $600 million
WV -9049 WV: -$9 million
WI -287827 WI: -$288 million
WY 76988 WY: $77 million
我的googleVis声明是：
AIG <- gvisGeoChart(difference, locationvar = "State", colorvar = "AIG",
hovervar = "AIG_pretty",
options = list(projection = "lambert", region = "US",
resolution = "provinces",
colorAxis = "{values:[-4928379, -1355690.39529412, 0, 1355690.39529412, 4928379], colors:['red', 'darkorange', 'white', 'blue', 'darkviolet']}",
height = 900 , width = 1200))
我希望鼠标悬停上的工具提示只显示＆＃34; hovervar＆＃34; （AIG_pretty）并压制AIG和State。它似乎自动抑制状态，但如何在输出映射中抑制AIG？