Dear ALL, I have a dataframe contains 4 columns and several 10 millions of rows like below! I want to extract out "randomly" say 1 millions of rows, can you tell me how to do that in R using base packages? Many Thanks!!!!
Col_1 Col_2 Col_3 Col_4 chr1 3000215 3000250 - chr1 3000909 3000944 + chr1 3001025 3001060 + chr1 3001547 3001582 + chr1 3002254 3002289 + chr1 3002324 3002359 - chr1 3002833 3002868 - chr1 3004565 3004600 - chr1 3004945 3004980 + chr1 3004974 3005009 - chr1 3005115 3005150 + chr1 3005124 3005159 + chr1 3005240 3005275 - chr1 3005558 3005593 - chr1 3005890 3005925 + chr1 3005929 3005964 + chr1 3005913 3005948 - chr1 3005913 3005948 - Stephen HK Wong ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
