如何防止在R中读取特殊字符？

Question

在python中，可以通过在字符串前添加\n来防止字符串被特殊字符（例如r或 >>> file_string=r'D:\MPhil\Experiments\WafergenPlates\GSS2265ShortTGFbTimeCourseAffeymetrix\GSS2265\Raw_Data' ）解释，即

grid = [['.','.','0','0','.','0','0','.','.'],
        ['.','0','0','0','0','0','0','0','.'],
        ['.','0','0','0','0','0','0','0','.'],
        ['.','.','0','0','0','0','0','.','.'],
        ['.','.','.','0','0','0','.','.','.'],
        ['.','.','.','.','0','.','.','.','.'],
        ['.','.','.','.','.','.','.','.','.']]
print(grid)

我的问题是：什么是＆＃39; R＆＃39;当量？