Error in read.dcf(file.path(pkgname, "DESCRIPTION"), c("Package", "Type")) : 无法打开链结此外: Warning messages:1: In file(con, "r") : InternetOpenUrl失败:’无法与服务器建立连接'2: In download.file(url, destfile, method, mode = "wb", ...) : downloaded length 3305472 != reported length 45063733: In unzip(zipname, exdir = dest) : 从zip文件中抽取1时出了错4: In read.dcf(file.path(pkgname, "DESCRIPTION"), c("Package", "Type")) : 无法打开压缩文件'Matrix/DESCRIPTION',可能是因为'No such file or directory'
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