plot.ces.table <-
function(x, graph=NULL, ...){
if( is.null(graph) | !is.numeric(graph) ){
cat(paste0('Graph should be a number between 1 and ', length(x$results),
'; choose from:\n'))
print(names(x$results))
invisible()
} else
result <- plot(x$results[[graph]], ...)
invisible(result)
}
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