rowStdp
Syntax
rowStdp(args…)
Please see Row-Based Functions for the parameters and calculation rules.
Details
Calculate the population standard deviation of each row.
Examples
$ m=matrix([4.5 2.6 1.5, 1.5 4.8 5.9, 4.9 2.0 NULL])
$ rowStdp(m);
[1.517307556898806,1.203698005684518,2.2]
$ t1=table(1..5 as x, 10..6 as y, take(3, 5) as z)
$ t2=table(5..1 as a, 6..10 as b, take(8, 5) as c);
$ rowStdp(t1);
[3.858612300930075,3.091206165165235,2.357022603955159,1.699673171197595,1.247219128924648]
$ rowStdp(t1[`x], t2, 1 1 2 2 2);
[2.785677655436824,2.727636339397171,2.638181191654584,2.966479394838265,3.42928563989645]
$ 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,rowStdp(price1,price2) as stdp from t;
sym |
stdp |
|---|---|
AAPL |
62.815 |
MS |
10.65 |
IBM |
10.4 |
IBM |
10.635 |
C |
74.37 |