std
Syntax
std(X)
Arguments
X is a scalar/vector/matrix.
Details
If X is a vector, return the the (unbiased) sample standard deviation of X.
If X is a matrix, calculate the the (unbiased) sample standard deviation of each column of X and return a vector.
As with all aggregate functions, NULL values are not included in the calculation.
Please note that the result is sample standard deviation instead of population standard deviation.
Examples
std(1 2 3);
// output
1
m=matrix(1 3 5 7 9, 1 4 7 10 13);
m;| #0 | #1 |
|---|---|
| 1 | 1 |
| 3 | 4 |
| 5 | 7 |
| 7 | 10 |
| 9 | 13 |
std(m);
// output
[3.162277660168379,4.743416490252569]