Quantify the smoothness of a vector

## Arguments

- x
Numeric vector (similar to a time series).

- method
Can be "diff" (the standard deviation of the standardized differences) or "cor" (default, lag-one autocorrelation).

- lag
An integer indicating which lag to use. If less than 1, will be interpreted as expressed in percentage of the length of the vector.

- iterations
The number of bootstrap replicates for computing standard errors. If

`NULL`

(default), parametric standard errors are computed.- ...
Arguments passed to or from other methods.