The format is:
num [1:400, 1:18] 48 7 62 48 51 60 68 24 52 53 ...
- attr(*, "dimnames")=List of 2
..$ : NULL
..$ : chr [1:18] "age" "bp" "sg" "al" ...
Details
There are 1010 missing values in the data set, accounting for 14.03 percent.
References
Polat, H., Danaei-Mehr, H., and Cetin, A. (2017). Diagnosis of chronic kidney disease based on support vector machine by feature selection methods. Journal of Medical Systems, 41(4), 1-11.