注意语法
try this
clear
sysuse auto
replace price=price*100000
tabstat price weight mpg rep78, by(make) stat(sum) format(%18.0f)
Summary statistics: sum
by categories of: make (Make and Model)
make | price weight mpg rep78
-----------------+----------------------------------------
AMC Concord | 409900000 2930 22 3
AMC Pacer | 474900000 3350 17 3
AMC Spirit | 379900000 2640 22 0
Audi 5000 | 969000000 2830 17 5
Audi Fox | 629500000 2070 23 3
BMW 320i | 973500000 2650 25 4
Buick Century | 481600000 3250 20 3
Buick Electra | 782700000 4080 15 4
Buick LeSabre | 578800000 3670 18 3
Buick Opel | 445300000 2230 26 0
Buick Regal | 518900000 3280 20 3
Buick Riviera | 1037200000 3880 16 3
Buick Skylark | 408200000 3400 19 3
Cad. Deville | 1138500000 4330 14 3
Cad. Eldorado | 1450000000 3900 14 2
Cad. Seville | 1590600000 4290 21 3
--Break--