Probably ?anova ?add1 ?drop1
are what you're looking for. -- Bert On Wed, Nov 23, 2011 at 6:07 AM, Christopher Desjardins <desja...@umn.edu> wrote: > Hi, > > I am wondering if anyone knows how to perform an F-test on the change in R > square between hierarchical models in R? SPSS provides this information and > a researcher that I am working with is interested in getting this > information. Alternatively, if someone knows how I can calculate the test > statistic (SPSS calls it F-change?) and dfs that would be helpful as well. > > The output and the test I am looking for is available here -> > http://dl.dropbox.com/u/1501309/spss_rsquared.pdf > > Chris > > On Wed, Nov 23, 2011 at 6:20 AM, Smart Guy <smartgu...@gmail.com> wrote: > >> Hi All, >> I was adding a new row of data to my data frame using rbind(). I >> was surprised to see that after adding new row, I lost my data frame level >> attibute as well as col level attribute. Please help me to insert a new >> row at frist or middle position so that my custom attribute is not lost. >> >> Here is what I did. >> >> age<-c(15,20,18) >> weight<-c(40,42,30) >> >> ### creating my data frame #### >> mydata <- data.frame(age,weight) >> >> ### creating data frame level attribute #### >> attr(mydata,"myattr")<-c("myinfo") >> >> ### creating col level attribute for 'age' column ### >> attr(mydata$age,"mycolattr")<-c("mycolinfo") >> >> #### Checking attributes ### >> attributes(mydata) >> attributes(mydata$age) >> >> ### creating new row ##### >> newrow <- data.frame(age=16, weight= 42) >> >> #### Inserting newrow as first row to my data frame #### >> mydata<- rbind(newrow, mydata) >> >> #### Checking attributes again ### I lost my custom attributes >> attributes(mydata$age) >> attributes(mydata) >> >> >> Thanks in advance, >> >> >> -- >> SG >> >> [[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. >> > > [[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. > -- Bert Gunter Genentech Nonclinical Biostatistics Internal Contact Info: Phone: 467-7374 Website: http://pharmadevelopment.roche.com/index/pdb/pdb-functional-groups/pdb-biostatistics/pdb-ncb-home.htm ______________________________________________ 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.