importFrom("zoo", is.zoo, as.Date, as.zoo, zoo, coredata, as.yearmon, rollapply)
importFrom("xts", is.xts, as.xts, to.period, axTicksByTime, apply.daily, periodicity, xts, .index)
#importFrom("zoo", aggregate) # aggregate is not exported from zoo

importFrom("stats", time, cor, cor.test, symnum, plot.stepfun, ecdf, median, splinefun, integrate, filter, IQR, sd, start, end, window, aggregate)
importFrom("graphics", boxplot, plot, hist, par, layout, axis, Axis, abline, lines, points, legend, box, text, strwidth, rect, polygon, pairs, panel.smooth)
importFrom("grDevices", xy.coords, palette, colorRampPalette, dev.set, dev.list, dev.new)
importFrom("zoo", is.zoo, as.Date, as.zoo, zoo, coredata, as.yearmon, rollapply, index, "time<-")
importFrom("sp", proj4string, coordinates, "coordinates<-", "proj4string<-", spplot, CRS, spsample, "gridded<-", SpatialPoints, layout.north.arrow, layout.scale.bar, over)

importFrom("stats", time, cor, cor.test, symnum, plot.stepfun, ecdf, median, splinefun, integrate, filter, IQR, sd, start, end, window, aggregate, approxfun, fivenum, lm, quantile, rnorm, runif)
importFrom("grDevices", xy.coords, palette, colorRampPalette, dev.set, dev.list, dev.new, dev.off, png, rainbow)
importFrom("utils", read.table, write.table, write.csv, write.csv2, installed.packages, ls.str, modifyList, sessionInfo, setTxtProgressBar, txtProgressBar)
importFrom("graphics", barplot, grid, axTicks, Axis, abline, axis, boxplot, hist, legend, lines, mtext, par, plot)

## this is used by guiDo in the plotAndPlayGTK package

importFrom("stats", "as.formula", "lm", "optim", "runif", "sd")

import(mlr, BBmisc, ParamHelpers, unbalanced, randomForest, foreach, iterators, doParallel, parallel)

import(unbalanced, randomForest, foreach, iterators, doParallel, parallel)

importFrom("graphics", "contour", "image", "segments", "text")
importFrom("stats", "cov", "nlm", "optim", "quantile", "runif")

importFrom(elliptic, view, integrate.segments, myintegrate, residue)

export(hypervolume, plot.HypervolumeList, plot.Hypervolume, hypervolume_set, hypervolume_inclusion_test, summary.Hypervolume, summary.HypervolumeList, estimate_bandwidth)