read.table函数

chunlijing

1500

收藏 2013-10-23

请帮下忙read.table函数中colClasses nrows comment.char 参数什么意思，多谢！

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麻烦and纠结

2013-10-23 11:04:55

comment.char character: a character vector of length one containing a single character or an empty string. Use "" to turn off the interpretation of comments altogether

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麻烦and纠结

2013-10-23 11:05:22

nrows integer: the maximum number of rows to read in. Negative and other invalid values are ignored.

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麻烦and纠结

2013-10-23 11:05:54

colClasses character. A vector of classes to be assumed for the columns. Recycled as necessary, or if the character vector is named, unspecified values are taken to be NA.