Hi ?cumsum
Petr r-help-boun...@r-project.org napsal dne 07.04.2010 14:26:12: > Dear colleagues, > I have a data frame that looks so: > *x1 .... x4 > 1 4.2 > 2 3.6 > 3 2.7 > . > . > 308 n.a. > > x4 is a vector of percentages, sorted in descending value. I would > like to create a new variable that represents the sum of the series of > values of x4 to that row. So I would like x5 to look like this. > > x5 > 1 4.2 > 2 7.8 (4.2 +3.6) > 3 10.5 (4.2+3.6+2.7) > > 308 =na > > So the last number in the vector x5 should be 100, as these are all > percentages. > > Any suggestions? Yours truly, > simon Kiss > ********************************* > Simon J. Kiss, PhD > SSHRC and DAAD Post-Doctoral Fellow > John F. Kennedy Institute of North America Studies > Free University of Berlin > Lansstraße 7-9 > 14195 Berlin, Germany > Cell: +49 (0)1525-300-2812, > Web: http://www.jfki.fu-berlin.de/index.html > > ______________________________________________ > 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. ______________________________________________ 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.
