[Rd] No is.formula()

From: Warnes, Gregory R <gregory_r_warnes_at_groton.pfizer.com>
Date: Thu 26 Aug 2004 - 07:15:03 EST

There appears to be no "is.formula()" function in R-1.9.1. May I suggest that

        is.formula <- function(x) inherits(x, "formula")

be added to base, since formula is a fundimental R type?

Gregory R. Warnes
Manager, Non-Clinical Statistics
Pfizer Global Research and Development

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