If you want a character representation of a long formula (or
a formula with long names), you can use:
as.character(my.formula)
However restriction on length of an as.character result
returns only the beginning of a long formula, and without comment.
In most cases, the following expression provides the complete
result:
paste(my.formula[[2]], " ~ ", paste(attr(terms(my.formula),
"term.labels"),collapse= " + "),sep="")
It would be better to make as.character handle any size formula.
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