exportPattern("^[[:alpha:]]+")
import(stargazer)
importFrom(grDevices, dev.new)
importFrom(graphics, abline, boxplot, curve, hist, lines, mtext, par, plot, points, title)
importFrom(stats, anova, aov, dnorm, kmeans, lm, model.tables, pchisq, pf, ppoints, pt, ptukey, qnorm, qt, qtukey, runif, shapiro.test, var)
importFrom(utils, combn, read.table)
importFrom(stats, AIC, coef, fitted, fitted.values, na.action, na.omit, nls, residuals)