[R] Contingency tables example

[David Winsemius]

On Dec 29, 2011, at 7:15 AM, sambooth21 wrote:

> I am having a few problems importing the data i'm running this code  
> and the
> table sets up fine but all of the data values say NA:
>
> housdat<- c(21, 21, 28, 14, 19, 37, 34, 22, 36, 17, 23, 401, 10, 11,  
> 36, 3,
> 5, 23, 61, 23, 17, 78, 46, 43, 43, 35, 40, 48, 45, 86, 26, 18, 54,  
> 15, 25,
> 62)
> housdat<-array(dim=c(2,3,6))
> dimnames(housdat) <- list(Housing=c("Tower Block","Apartment"),
> Influence=c("Low","Medium","High"),
> ContactSatisfaction 
> =c("LCLow","LCMed","LCHigh","HCLow","HCMed","HCHigh"))
>
> ftable(housdat, row.vars=c("Housing","Influence"),
> col.vars="ContactSatisfaction")
>
> any advice would be greatly appreciated!

  Rhelp is NOT a homework help list. If you are a student, as you give  
every appearance of being, then you should be seeking help through  
your usual academic channels. This dataset regarding Copenhageners'  
satisfaction with housing conditions from 30 or 40 years ago is widely  
copied in a variety of textbooks and websites, (including R's own MASS  
where its name is 'housing').

-- 

David Winsemius, MD
Heritage Laboratories
West Hartford, CT