rowAvg

语法

rowAvg(args...)

row 系列函数通用参数说明和计算规则请参考: 行计算系列(row 系列)

详情

逐行进行元素求平均操作,返回一个长度与输入参数行数相同的向量。

例子

$ m=matrix([4.5 2.6 1.5, 1.5 4.8 5.9, 4.9 2.0 NULL])
$ rowAvg(m);
[3.633333,3.133333,3.7]

$ t1=table(1..5 as x, 6..10 as y)
$ t2=table(5..1 as a, 10..6 as b);
$ rowAvg(t1);
[3.5,4.5,5.5,6.5,7.5]

$ rowAvg(t1[`x], t2, take(1, 5));
[4.25,4,3.75,3.5,3.25]

$ t=table(`AAPL`MS`IBM`IBM`C as sym, 49.6 29.46 29.52 30.02 174.97 as price1, 175.23 50.76 50.32 51.29 26.23 as price2)
$ select sym,rowAvg(price1,price2) as avg from t;

sym

price1

AAPL

112.415

MS

40.11

IBM

39.92

IBM

40.655

C

100.6

相关函数:avg