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.
