小编dor*_*boy的帖子

我正在运行Windows XP Pro和R版本2.15.1 R安装在以下文件夹中:

C:\ Program Files\R\R-2.15.1

我正在尝试创建一个读取.csv文件的函数,如下所示:

xxx <- function(id, directory, summarize = FALSE) {
    data <- read.table('C:\xxx\classes\R_Prog\specdata\data.csv')
    head(data)
}

我收到了错误

错误:'\ R'是从"C:\ R"开始的字符串中无法识别的转义符

我的目录结构/文件夹命名约定有问题吗？

有关如何解决这个问题的任何想法？我正在使用pip在Win XP Pro SP 3机器上安装Scrapy.我在机器上安装了Python 2.7.pyOpenSSL似乎有问题.我收到"找不到'openssl.exe'"错误.

这是我的日志文件.由于其中的URL,我不得不破解它.

Requirement already satisfied (use --upgrade to upgrade): Scrapy in c:\python27\lib\site-packages\scrapy-0.14.4-py2.7.egg

Requirement already satisfied (use --upgrade to upgrade): Twisted>=2.5 in c:\python27\lib\site-packages (from Scrapy)

  Downloading from URL pypi.python.org/packages/source/w/w3lib/w3lib-1.2.tar.gz#md5=f929d5973a9fda59587b09a72f185a9e (from pypi.python.org/simple/w3lib/)
  Running setup.py egg_info for package w3lib

    running egg_info
    creating pip-egg-info\w3lib.egg-info
    writing pip-egg-info\w3lib.egg-info\PKG-INFO
    writing top-level names to pip-egg-info\w3lib.egg-info\top_level.txt
    writing dependency_links to pip-egg-info\w3lib.egg-info\dependency_links.txt
    writing manifest file 'pip-egg-info\w3lib.egg-info\SOURCES.txt'
    warning: manifest_maker: standard file '-c' not found


    reading manifest file 'pip-egg-info\w3lib.egg-info\SOURCES.txt'
    writing manifest file 'pip-egg-info\w3lib.egg-info\SOURCES.txt'
  Source in c:\ray\dist\pip-1.1\build\w3lib has version …

我有以下查询

var customers = from customer in context.tblAccounts 
                join assoc in context.tblAccountAssociations on customer.AccountCode equals assoc.ChildCode 
                where customer.AccountType == "S" || customer.AccountType == "P" 
                select customer, assoc;

C#最后不喜欢"assoc".

我的错误信息是:

名为'assoc'的局部变量不能在此范围内声明,因为它会给'assoc'赋予不同的含义,'assoc'已经在'child'范围内用于表示其他内容.

我需要从两个表中返回所有列,然后使用a进行迭代

foreach(客户中的客户)