exportPattern("^[[:alpha:]]+")
importFrom("graphics", "abline", "lines", "par", "plot", "text",
                "title","persp")
importFrom("stats", "ARMAacf", "ARMAtoMA", "Box.test", "acf", "ar",
                "arima", "ccf", "coef", "cor", "filter", "lm", "lm.fit", "mad",
                "median", "na.omit", "nlm", "pacf", "pchisq", "qchisq",
                "qnorm", "resid", "residuals", "sd", "ts", "ts.plot", "tsp",
                "var", "weighted.mean", "complete.cases", "toeplitz", "is.ts", "quantile", "rnorm") 
importFrom("vars", "VAR","VARselect")
importFrom("Matrix", "bandSparse","crossprod","solve")
importFrom("fftwtools", "fftw","mvfftw")
importFrom("hdm", "rlasso", "lambdaCalculation", "LassoShooting.fit") 