I suppose this doesn't work for the same reason as sdata$VaR < sdata$DdtdAbs && sdata$DdtdDuration >= 1
does only return FALSE and not a vector of TRUE and FALSE as sdata$VaR < sdata$DdtdAbs would return. Is there a ways around this? Benjamin On 1/9/07, Benjamin Dickgiesser <[EMAIL PROTECTED]> wrote: > Hi all, > > why doesn't something like this does not work? > > speedy <- > (sdata$VaR < sdata$DdtdAbs) && sdata$DdtdDuration >= > qpois(pct,lambda) && > sdata$Ddtd > MinDD > > or sdata$Ddtd[sdata$Ddtd > 0 && sdata$VaR < sdata$DdtdAbs] > > sdata looks like this: > > dataId date value Ddtd VaR DdtdAbs DdtdDuration > 18948 79637 2004-07-27 10085.10 NA NA 0.00 0 > 18949 79638 2004-07-28 10117.10 NA NA 0.00 0 > 18950 79639 2004-07-29 10129.20 NA NA 0.00 0 > 18951 79640 2004-07-30 10139.70 NA NA 0.00 0 > 18952 79641 2004-08-02 10179.20 NA NA 0.00 0 > 18953 79642 2004-08-03 10120.20 0.579613329 336.060090 59.00 1 > 18954 79643 2004-08-04 10126.50 NA NA 0.00 0 > 18955 79644 2004-08-05 9963.03 1.614279366 334.306978 163.47 1 > 18956 79645 2004-08-06 9815.33 3.072828717 386.173057 311.17 2 > 18957 79646 2004-08-09 9814.66 3.079445020 420.167049 311.84 3 > 18958 79647 2004-08-10 9944.67 NA NA 0.00 0 > 18959 79648 2004-08-11 9938.32 0.063853300 328.315992 6.35 1 > 18960 79649 2004-08-12 9814.59 1.308037371 379.182568 130.08 2 > > I am trying to select rows from the data.frame which have Ddtd > x, > VaR < DdtdAbs and DdtdDuration > z. > > Thank you, > Benjamin > ______________________________________________ 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 and provide commented, minimal, self-contained, reproducible code.