Stata命令语句label variable abc "每股净资产"的功能是()
A. 给数据集abc添加标签
B. 给变量abc添加值标签
C. 给变量abc添加标签
D. 给数据集abc添加值标签
Stata建立新变量的命令语句是()
A. label list gender
B. gen educat=0
C. replace educat=1 if educ==4
D. list sex gender in 1/4
现行Stata数据的横向合并命令语句是()
A. append using filename [,options]
B. joinby [varlist] using filename [,options]
C. cross using filename
D. merge 1:1 [varlist] using filename[,options]
Stata绘制散点图的最基本的命令语句是()
A. scatter y x
B. scatter le year, connect(l) msymbol(d) mcolor(red) lcolor(green)
C. graph export p317.png,replace
D. liney x