Quite often I use a DataFrame objects as columns in other DataFrame object.

The inbuilt showAsCell generic does not natively support this - would it be possible to include

such a function into one of the next releases of the s4vectors package?

I use the following method:

setMethod("showAsCell",signature("DataFrame"),
          function(object){
              cnams = paste(colnames(object),collapse=':')
              if(nchar(cnams) > 10)
                  cnams = paste0(substring(cnams, 1,10),'...')
              rep(cnams, nrow(object))
}) 

Best regards, 

Vedran

This issue has been resolved in S4Vectors 0.11.19.