stdp

swordfish.function.stdp()

If X is a vector, return the population standard deviation of X.

If X is a matrix, calculate the population standard deviation of each column and return a vector.

If X is a table, calculate the population standard deviation of each column and return a table.

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

参数:

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