standard deviation function
The standard deviation is a statistical function which measures the dispersion of a dataset relative to its mean, and it is the square root of the variance.
The higher the standard deviation, the furthest the values are far from the expected standard value.
Function and parameters
It identifies the column to which you want to apply the formula. The column parameter is mandatory.
It allows you to group the results by a certain column.
The following example uses the Bike sales dataset.