Yichih, Answer 2 is "correct," because your indexing specification for 1 is wrong. You also seem to have left out a comma.
## mu1990$wage[mu1990$edu==2|mu1990$edu==3|mu1990$edu==4, ] ## like this mu1990$wage[mu1990$edu%in%2:4, ] You really could have worked this out for yourself by looking at the results of your subsetting/indexing operation. Mark. Yichih Hsieh wrote: > > Dear all, > > I got another problem: > > if education have five levels > > edu=1 > edu=2 > edu=3 > edu=4 > edu=5 > > If I want to appoint y=edu2~4 in 1990 > which programs is correct? > I tried this two programs, they both work, but two results is different. > > 1. > fig2b<-reldist(y=mu1990$wage[mu1990$edu==2|3|4],......) > > > 2. > fig2b<-reldist(y=mu1990$wage[mu1990$edu%in%2:4],......) > > which one is correct? > and why they have different results? > > > All help high appreciated. > > > best, > Yichih > > 2009/9/5 Yichih Hsieh <yichih.hs...@gmail.com> > >> >> Dear Petr, >> >> your suggestion is useful >> >> many thanks for your help ! >> >> >> best, >> Yichih >> >> 2009/9/3 Petr PIKAL <petr.pi...@precheza.cz> >> >> Hi >>> >>> use any of suitable selection ways that are in R. >>> >>> E.g. >>> >>> data[data$gender==1, ] >>> >>> selects only female values >>> >>> data$wage[(data$gender==1) & (data$race=1)] selects black female wages. >>> >>> and see also ?subset >>> >>> Regards >>> Petr >>> >>> r-help-boun...@r-project.org napsal dne 03.09.2009 10:51:59: >>> >>> > Dear all, >>> > >>> > I have 1980~1990 eleven datas, >>> > every year have three variables, >>> > wage >>> > gender(1=female, 2=male) >>> > race(1=black, 2=white) >>> > >>> > My original commands is: >>> > >>> > fig2b<-reldist(y=mu1990$wage,yo=mu1980$wage,.......) >>> > >>> > I have three questions: >>> > 1. If I want to appoint y=women's wage in 1990 >>> > yo=women's wage in 1980 >>> > 2. If I want to appoint y=women's wage in 1990 >>> > yo=men's wage in 1990 >>> > 3. If I want to appoint y=black women's wage in 1990 >>> > yo=white women's wage in 1990 >>> > >>> > How can I modify the commands? >>> > >>> > All help highly appreciated. >>> > >>> > Best, >>> > Yichih >>> > >>> > >>> > -- >>> > Yichih Hsieh >>> > >>> > e-mail : yichih.hs...@gmail.com >>> > >>> > [[alternative HTML version deleted]] >>> > >>> > ______________________________________________ >>> > 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<http://www.r-project.org/posting-guide.html> >>> > and provide commented, minimal, self-contained, reproducible code. >>> >>> >> >> >> -- >> Yichih Hsieh >> >> e-mail : yichih.hs...@gmail.com >> > > > > -- > Yichih Hsieh > > e-mail : yichih.hs...@gmail.com > > [[alternative HTML version deleted]] > > ______________________________________________ > 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. > > -- View this message in context: http://www.nabble.com/How-can-I-appoint-a-small-part-of-the-whole-data-tp25272209p25308714.html Sent from the R help mailing list archive at Nabble.com. ______________________________________________ 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.
