[−][src]Module arima::util
Functions
center | Center vector, i.e. remove the mean from each element. Returns a tuple containing the centered vector and the mean. |
cumsum | Calculate the cumulative sum of a vector. |
diff | Returns a n-1 vector containing the pairwise difference x_t - x_t-1. |
diff_log | Returns a n-1 vector containing the pairwise difference of log(x_t) - log(x_t-1). |
diffinv | Calculate the inverse difference of a vector. |
lag | Returns a n-tau vector containing the time series lagged by tau. |
mean | Calculate the mean of a vector. |