在R中运行wget时，为什么系统状态错误为127？
[英]Why do I get a system status error of 127 when I run wget in R?
问题描述
I am trying to run a script to download some weather data from a NOAA ftp site. 
我正在尝试运行脚本以从NOAA ftp站点下载一些天气数据。 When I attempt to run the following command: 当我尝试运行以下命令时：
system("wget ftp://ftp.ncdc.noaa.gov/pub/data/noaa/2016/999999-54856-2016.gz")
it returns status 127, which as I understand simply means the command will not run. 它返回状态127，据我了解，这仅意味着该命令将不会运行。 This link on the other hand, seems to be working well and downloads the zip folder when I ran it in the browser. 另一方面，当我在浏览器中运行该链接时，该链接似乎运行良好并下载了zip文件夹。 I read online about adding the path 'C:\\Rtools\\bin' from this link: Create zip file: error running command " " had status 127 but that doesn't seem to work either. 我从此链接在线阅读有关添加路径'C：\\ Rtools \\ bin'的信息： 创建zip文件：运行命令“”时出错，状态为127，但这似乎也不起作用。 I'm wondering if this might be a permissions issue or other security setting preventing me from invoking system commands. 我想知道这是否可能是权限问题或其他安全设置，导致我无法调用系统命令。 Any ideas? 有任何想法吗？ Thanks! 谢谢！
1 个解决方案
解决方案1
0 已采纳 2017-09-27 17:58:14
You're using Windows. 您正在使用Windows。 wget is a Unix/Linux program. wget是Unix / Linux程序。 You can just call download.file to download from within R: 您可以只调用download.file从R中下载：
download.file("ftp://ftp.ncdc.noaa.gov/pub/data/noaa/2016/999999-54856-2016.gz",
"999999-54856-2016.gz", mode="wb")
The mode="wb" is important for downloading binary files on Windows. mode="wb"对于在Windows上下载二进制文件很重要。
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