exportPattern("^[[:alpha:]]+")
importFrom(stats, approx, complete.cases,ecdf,median,rchisq,rexp,rlnorm,rnorm,runif)
importFrom(graphics, abline, contour, image, legend, lines, mtext, persp, plot, title) 
importFrom(grDevices, colorRampPalette, dev.new, dev.off, rainbow)
