构建矩阵person的代码如下: height <- sample(155:185,20,replace=T) #身高 weight <- sample(45:90,20,replace=T) #体重 sex <- sample(0:1,20,replace=T) #0表示女 1表示男 person <- cbind(ID=1:20,height,weight,sex)下列哪个语句可以将身高大于180(包含)的男生选取出来?
选项:
A:person[person[,"sex"]==1 & person[,"height"]>180, ];
B:person[person[,"sex"]==1 & person[,"height"]>=180, ];
C:person[person[,"sex"]==1 && person[,"height"]>=180, ];
D:person[person[,"sex"]==0 & person[,"height"]>=180,]
发布时间:2024-04-12 22:12:03