scan 去掉双引号 引号

scan(file = “”, what = double(), nmax = -1, n = -1, sep = “”,
quote = if(identical(sep, “\n”)) “” else “’”", dec = “.”,
skip = 0, nlines = 0, na.strings = “NA”,
flush = FALSE, fill = FALSE, strip.white = FALSE,
quiet = FALSE, blank.lines.skip = TRUE, multi.line = TRUE,
comment.char = “”, allowEscapes = FALSE,
fileEncoding = “”, encoding = “unknown”, text, skipNul = FALSE)