### Three point autocorrelation statistic

`autocor3 [-d# -D# -l# -x# -c# -h]` file(s)

> `-d` delay one (1)
> `-D` delay two (2x delay one)
> `-l` number of points (whole file)
> `-x` number of values to be skipped (0)
> `-c` column to be read (1 or file,#)
> `-h` show this message

Computes

                   _         _         _
            < (y - y)*(y   - y)*(y   - y) >
                n       n-d       n-D
           --------------------------------
                            _ 3
                    < (y  - y)  >
                        n

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