k-periods uncentered moving average for a time series
CALLING SEQUENCE
xma = maokts(xts,k)
PARAMETERS
Input
* xts = a time series
* k = size of the moving average
Output
* xma = the filtered serie (with the same size of xts)
DESCRIPTION
Computes k-periods uncentered moving average. The first (k-1)-values of the moving average are compute by "pading" the first initial values of the time serie.