Nothing
#' @export
"as.anova" <-
function(df, heading)
{
if(!inherits(df, "data.frame"))
stop("df must be a data frame")
attr(df, "heading") <- heading
#if the "class" attribute of df already starts with "anova" return(df)
if(inherits(df, "anova")) {
dfClasses <- attr(df, "class")
if(dfClasses[1] == "anova")
return(df)
}
class(df) <- unique(c("anova", class(df)))
df
}
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