Hello Martin, You were almost there :)
T1 <- subset(daten1, Geschlecht=="M" & GG=="A") Hope this helps. Michael On 10 December 2010 22:25, Martin Spindler <martin.spind...@gmx.de> wrote: > Dear all, > > I have a dataframe of the following strucutre > > numacc_b coverage_b Geschlecht GG > 1 0 1 W A > 2 0 1 M A > 3 0 1 M B > 4 0 1 M B > 5 0 1 W A > 6 0 1 M B > > I would like to form a subset consisting of all entries with Geschlecht=M and > GG=A. > > Using > >>T1 <- subset(daten1, Geschlecht=="M", GG=="A") > > delievers > > data frame with 0 columns and 6 rows > >> T1 <- subset(daten1, Geschlecht=="M") > > delievers > > numacc_b coverage_b Geschlecht GG > 2 0 1 M A > 3 0 1 M B > 4 0 1 M B > 6 0 1 M B > 9 0 1 M B > 10 0 1 M B > > But I want to select the dataframe according to both factos. > > What can I do? > > Thank you answers in advance! > > Best, > > Martin > -- > GMX DSL Doppel-Flat ab 19,99 €/mtl.! Jetzt auch mit > gratis Notebook-Flat! http://portal.gmx.net/de/go/dsl > > ______________________________________________ > 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.
