Helper function to smooth numerical data using methods specified by the user.

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`x` |
numeric vector of values to smooth |

`method` |
one of |

`...` |
any other arguments to be passed to each specific smoothing methodology. |

At this moment in time, the only method is the
`'gaussian'`

window function (similar to the Matlab
Gaussian Window Smoothing Function) and a number of moving
averages `'sma', 'ema', 'dema'`

or `'wma'`

. These
are functions that allows the user to smooth an input
vector, returning vector of the same length as the input.
This can also be achieved using the specific
`smth.gaussian`

function.

a numeric vector of same length as input `'x'`

vector

If the `'method'`

argument is equal to
`'gaussian'`

, then this function is a port of the
function described here: http://goo.gl/HGM47U, very
loosly based of code which has also been ported to c++
here: http://goo.gl/NK79bJ

Refer to specific man files: `smth.gaussian`

,
`SMA`

, `EMA`

,
`DEMA`

or `WMA`

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