On Fri, 17 Oct 2003 [EMAIL PROTECTED] wrote: > I've the following data frame with 54 rows and 4 colums: > > > x > Ratio Dose Time Batch > R.010mM.04h.NEW 0.02 010mM 04h NEW > R.010mM.04h.NEW.1 0.07 010mM 04h NEW > ... > R.010mM.24h.NEW.2 0.06 010mM 24h NEW > R.010mM.04h.OLD 0.19 010mM 04h OLD > ... > R.010mM.04h.OLD.1 0.49 010mM 04h OLD > R.100mM.24h.OLD 0.40 100mM 24h OLD > > I'd like to create a sub data frame containing all rows where Batch == "OLD" > and keeping the 4 colums. Assume that I don't know the order of the rows > (otherwise I could just do something like x[1:20,]). > > I've tried x[x$Batch == 'OLD'] or x[x[,4] == 'OLD'] but it generates errors.
That subsets columns, not rows. Try x[x$Batch == "OLD",] -- Brian D. Ripley, [EMAIL PROTECTED] Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/ University of Oxford, Tel: +44 1865 272861 (self) 1 South Parks Road, +44 1865 272866 (PA) Oxford OX1 3TG, UK Fax: +44 1865 272595 ______________________________________________ [EMAIL PROTECTED] mailing list https://www.stat.math.ethz.ch/mailman/listinfo/r-help
