[R] Extracting some rows from a data frame - lapses into a vector
I have a data frame with one column x: str(data) `data.frame': 20 obs. of 1 variable: $ x: num 0.0495 0.0986 0.9662 0.7501 0.8621 ... Normally, I know that the notation dataframe[indexes,] gives you a new data frame which is the specified set of rows. But I find: str(data[1:10,]) num [1:10] 0.0495 0.0986 0.9662 0.7501 0.8621 ... Here, it looks like the operation data[1:10,] has converted it from type data frame into a numeric vector. Why does this happen, and what can I do about it? -- Ajay Shah Consultant [EMAIL PROTECTED] Department of Economic Affairs http://www.mayin.org/ajayshah Ministry of Finance, New Delhi __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
Re: [R] Extracting some rows from a data frame - lapses into a vector
Ajay Narottam Shah ajayshah at mayin.org writes: I have a data frame with one column x: str(data) `data.frame': 20 obs. of 1 variable: $ x: num 0.0495 0.0986 0.9662 0.7501 0.8621 ... Here, it looks like the operation data[1:10,] has converted it from type data frame into a numeric vector. Why does this happen, and what can I do about it? Check parameter drop in the documentation of [ or Extract. The simplification to a vector is default behavior for historical reasons, but somewhat confusing. Dieter __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
