Tue Aug  4 08:28:27 2020 

geyser_bar
  R version 3.4.4 (2018-03-15) 
  Read binned data of waiting times between eruptions  of the Old Faithful geyser.  Create a corresponding bar plot.function (..., list = character(), package = NULL, lib.loc = NULL, 
    verbose = getOption("verbose"), envir = .GlobalEnv) 
{
    fileExt <- function(x) {
        db <- grepl("\\.[^.]+\\.(gz|bz2|xz)$", x)
        ans <- sub(".*\\.", "", x)
        ans[db] <- sub(".*\\.([^.]+\\.)(gz|bz2|xz)$", "\\1\\2", 
            x[db])
        ans
    }
    names <- c(as.character(substitute(list(...))[-1L]), list)
    if (!is.null(package)) {
        if (!is.character(package)) 
            stop("'package' must be a character string or NULL")
        if (any(package %in% "base")) 
            warning("datasets have been moved from package 'base' to package 'datasets'")
        if (any(package %in% "stats")) 
            warning("datasets have been moved from package 'stats' to package 'datasets'")
        package[package %in% c("base", "stats")] <- "datasets"
    }
    paths <- find.package(package, lib.loc, verbose = verbose)
    if (is.null(lib.loc)) 
        paths <- c(path.package(package, TRUE), if (!length(package)) getwd(), 
            paths)
    paths <- unique(normalizePath(paths[file.exists(paths)]))
    paths <- paths[dir.exists(file.path(paths, "data"))]
    dataExts <- tools:::.make_file_exts("data")
    if (length(names) == 0L) {
        db <- matrix(character(), nrow = 0L, ncol = 4L)
        for (path in paths) {
            entries <- NULL
            packageName <- if (file_test("-f", file.path(path, 
                "DESCRIPTION"))) 
                basename(path)
            else "."
            if (file_test("-f", INDEX <- file.path(path, "Meta", 
                "data.rds"))) {
                entries <- readRDS(INDEX)
            }
            else {
                dataDir <- file.path(path, "data")
                entries <- tools::list_files_with_type(dataDir, 
                  "data")
                if (length(entries)) {
                  entries <- unique(tools::file_path_sans_ext(basename(entries)))
                  entries <- cbind(entries, "")
                }
            }
            if (NROW(entries)) {
                if (is.matrix(entries) && ncol(entries) == 2L) 
                  db <- rbind(db, cbind(packageName, dirname(path), 
                    entries))
                else warning(gettextf("data index for package %s is invalid and will be ignored", 
                  sQuote(packageName)), domain = NA, call. = FALSE)
            }
        }
        colnames(db) <- c("Package", "LibPath", "Item", "Title")
        footer <- if (missing(package)) 
            paste0("Use ", sQuote(paste("data(package =", ".packages(all.available = TRUE))")), 
                "\n", "to list the data sets in all *available* packages.")
        else NULL
        y <- list(title = "Data sets", header = NULL, results = db, 
            footer = footer)
        class(y) <- "packageIQR"
        return(y)
    }
    paths <- file.path(paths, "data")
    for (name in names) {
        found <- FALSE
        for (p in paths) {
            if (file_test("-f", file.path(p, "Rdata.rds"))) {
                rds <- readRDS(file.path(p, "Rdata.rds"))
                if (name %in% names(rds)) {
                  found <- TRUE
                  if (verbose) 
                    message(sprintf("name=%s:\t found in Rdata.rds", 
                      name), domain = NA)
                  thispkg <- sub(".*/([^/]*)/data$", "\\1", p)
                  thispkg <- sub("_.*$", "", thispkg)
                  thispkg <- paste0("package:", thispkg)
                  objs <- rds[[name]]
                  lazyLoad(file.path(p, "Rdata"), envir = envir, 
                    filter = function(x) x %in% objs)
                  break
                }
                else if (verbose) 
                  message(sprintf("name=%s:\t NOT found in names() of Rdata.rds, i.e.,\n\t%s\n", 
                    name, paste(names(rds), collapse = ",")), 
                    domain = NA)
            }
            if (file_test("-f", file.path(p, "Rdata.zip"))) {
                warning("zipped data found for package ", sQuote(basename(dirname(p))), 
                  ".\nThat is defunct, so please re-install the package.", 
                  domain = NA)
                if (file_test("-f", fp <- file.path(p, "filelist"))) 
                  files <- file.path(p, scan(fp, what = "", quiet = TRUE))
                else {
                  warning(gettextf("file 'filelist' is missing for directory %s", 
                    sQuote(p)), domain = NA)
                  next
                }
            }
            else {
                files <- list.files(p, full.names = TRUE)
            }
            files <- files[grep(name, files, fixed = TRUE)]
            if (length(files) > 1L) {
                o <- match(fileExt(files), dataExts, nomatch = 100L)
                paths0 <- dirname(files)
                paths0 <- factor(paths0, levels = unique(paths0))
                files <- files[order(paths0, o)]
            }
            if (length(files)) {
                for (file in files) {
                  if (verbose) 
                    message("name=", name, ":\t file= ...", .Platform$file.sep, 
                      basename(file), "::\t", appendLF = FALSE, 
                      domain = NA)
                  ext <- fileExt(file)
                  if (basename(file) != paste0(name, ".", ext)) 
                    found <- FALSE
                  else {
                    found <- TRUE
                    zfile <- file
                    zipname <- file.path(dirname(file), "Rdata.zip")
                    if (file.exists(zipname)) {
                      Rdatadir <- tempfile("Rdata")
                      dir.create(Rdatadir, showWarnings = FALSE)
                      topic <- basename(file)
                      rc <- .External(C_unzip, zipname, topic, 
                        Rdatadir, FALSE, TRUE, FALSE, FALSE)
                      if (rc == 0L) 
                        zfile <- file.path(Rdatadir, topic)
                    }
                    if (zfile != file) 
                      on.exit(unlink(zfile))
                    switch(ext, R = , r = {
                      library("utils")
                      sys.source(zfile, chdir = TRUE, envir = envir)
                    }, RData = , rdata = , rda = load(zfile, 
                      envir = envir), TXT = , txt = , tab = , 
                      tab.gz = , tab.bz2 = , tab.xz = , txt.gz = , 
                      txt.bz2 = , txt.xz = assign(name, read.table(zfile, 
                        header = TRUE, as.is = FALSE), envir = envir), 
                      CSV = , csv = , csv.gz = , csv.bz2 = , 
                      csv.xz = assign(name, read.table(zfile, 
                        header = TRUE, sep = ";", as.is = FALSE), 
                        envir = envir), found <- FALSE)
                  }
                  if (found) 
                    break
                }
                if (verbose) 
                  message(if (!found) 
                    "*NOT* ", "found", domain = NA)
            }
            if (found) 
                break
        }
        if (!found) 
            warning(gettextf("data set %s not found", sQuote(name)), 
                domain = NA)
    }
    invisible(names)
}
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<environment: namespace:utils>
  Graphics saved as " geyser_bar.png "