std

swordfish.function.std()

If X is a vector, return the (unbiased) sample standard deviation of X.

If X is a matrix, calculate the (unbiased) sample standard deviation of each column of X and return a vector.

If X is a table, calculate the (unbiased) sample standard deviation of each column of X and return a table.

As with all aggregate functions, null values are not included in the calculation.

备注

The result is sample standard deviation instead of population standard deviation.

参数:

X (Constant) -- A scalar/vector/matrix/table.