·sumpricein1/5//其中1/5是1到5的意思 ·sumpricein1/10ifforeign==0//计算国产车中前10台车的平均价格 (5)加权weight ·sumscor[weight=num]//实际上不用权重时,相当于权重相等 (6)options可选项 ·sumscore,detail//不仅计算平均值还计算了成绩的中值、方差,偏度和峰度等 ·sumscore,d//d为detail的...