importFrom("R.oo", "load") ## Multi-sources: R.oo, base
importFrom("R.oo", "save") ## Multi-sources: R.oo, base
if (packageVersion("R.utils") < "1.27.5") {

"enter", "enterf", "exit", "filePath", "getAbsolutePath",
"saveObject", "stext", "subplots", "toCamelCase", "wrap")
"colMins", "colMaxs", "rowAlls", "rowAnys", "rowMins",
"segments.summary", "smooth.CNA", "CNA", "segment", "getbdry")
"abline", "arrows", "axis", "box", "lines",
"cor", "cutree", "density", "end", "mad", "median",
"na.omit", "quantile", "sd", "start", "weighted.mean")
"head", "packageVersion", "str", "tail", "write.table",

"binMeans", "colCumsums", "colDiffs", "colMins", "colMaxs",

"approx", "cor", "cutree", "density", "end", "mad", "median",

importFrom("stats", "dist", "frequency", "is.ts", "kmeans", "start",

importFrom("stats", "glm", "lm", "median", "na.omit", "nls","predict", "sd", "update", "var", "AIC")

export(PSM.simulate, PSM.estimate, PSM.smooth, PSM.plot, PSM.template, matexp)

importFrom("graphics", "abline", "axis", "barplot", "layout", "legend",
"lines", "mtext", "par", "rect", "segments", "symbols",

importFrom("stats", "pnorm", "pgamma", "dgamma", "plnorm", "dlnorm", "qlogis", "uniroot","nlminb")

import(reshape2, except = c(dcast, melt))

importFrom(stats4, update, coef, vcov, confint, summary)

importFrom(dcmle, dcmle, nchain, makeDcFit, varnames)

importFrom("graphics", "lines", "par", "points", "polygon", "segments", "text", "plot")

importFrom("stats", "pnorm", "qnorm", "rbinom", "runif", "residuals")

importFrom("stats", "residuals", "pnorm", "qnorm", "rnorm", "rbinom", "runif")

importFrom("stats", "pnorm", "qnorm", "rbinom", "runif", "residuals", "rnorm")

importFrom("stats", "pnorm", "qnorm", "rbinom", "runif", "residuals", "rnorm", "dbeta")

importFrom("graphics", "abline", "par", "plot", "points", "text")

mk_hypercube_graph, mk_line_graph,graph_product,graph_sum,knn_graph,dn_graph, kspace_graph, bipartite_graph, graph_compose,iterated_line_graph

mk_hypercube_graph, mk_line_graph,graph_product,knn_graph,dn_graph, kspace_graph, bipartite_graph, graph_compose,iterated_line_graph