There are many ways to do this. One example, supposing your data is in `myData':
## randomly pick 1/3 for validation: valid.idx <- sample(nrow(myData), round(nrow(myData)/3), replace=FALSE) ## training set: myData.tr <- myData[-valid.idx,] ## validation set: myData.valid <- myData[valid.idx,] HTH, Andy > From: Peyuco Porras Porras . > > Hi; > Does anyone know how to create a calibration and validation > set from a particular dataset? I have a dataframe with nearly > 20,000 rows! and I would like to select (randomly) a subset > from the original dataset (...I found how to do that) to use > as calibration set. However, I don't know how to remove this > "calibration" set from the original dataframe in order to get > my "validation" set.....Any hint will be greatly appreciated. > TT > > ______________________________________________ > [EMAIL PROTECTED] mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide! > http://www.R-project.org/posting-guide.html > > ______________________________________________ [EMAIL PROTECTED] mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html