rowMax
语法
rowMax(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
逐行进行取最大值的操作,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])
$ rowMax(m);
[4.9,4.8,5.9]
$ t1=table(1..5 as x, 6..10 as y)
$ t2=table(5..1 as a, 10..6 as b);
$ rowMax(t1);
[6,7,8,9,10]
$ rowMax(t1[`y], t2, take(8, 5));
[10,9,8,9,10]
$ 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,rowMax(price1,price2) as max from t;
sym |
max |
---|---|
AAPL |
175.23 |
MS |
50.76 |
IBM |
50.32 |
IBM |
51.29 |
C |
174.97 |
相关函数:max