R错误:输入格式未知 [英] R Error: unknown input format

问题描述

NEI <- readRDS(unz(tf, filename = "summarySCC_PM25.rds", open = "", encoding = getOption("encoding")))

变量tf 是一个临时文件，具有非常特定的位置，保存在硬盘驱动器上.据我了解， unz()是:

Variable tf is a temporary file with a very specific location saved on the hard drive. It is my understanding that the format for unz() is:

unz(description, filename, open = "", encoding = getOption("encoding"))

在阅读文档时，我解释说我对代码的应用是正确的:

As I read the documentation, I am interpreting that my application of the code is accurate as that:

1. 描述是一个特定的zip文件目标，在 var tf 中以c://...//345du.zip
的形式输出
2. 文件名是summarySCC_PM25.rds，这是要从tf中提取
的文件
3. open已在var中建立，所以黑色应该没问题
4. 编码可标记语言类型.

1. description is a specific zip file destination, which outputs in var tf as c://...//345du.zip
2. filename is summarySCC_PM25.rds, which is the file to be extracted from tf
3. open is already established in the var so black should be fine
4. encoding labels the language type.

在上述代码的上下文中，我从R 3.1.1收到错误:未知的输入格式".我需要弄清可能发生的情况，因为我将代码解释为与以下代码相同:

Within the context of the code above, I receive "Error: unknown input format" from R 3.1.1. I need clarification on what might be happening as that I interpret my code to be the same as:

NEI <- readRDS("summarySCC_PM25.rds")

我误解了吗?

推荐答案

由于临时文件是移动目标，请避免使用unz()并使用unzip(withanindex)

Avoid unz() and use unzip(withanindex) since the temp file is a moving target

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