[Rd] sapply(Date, is.numeric) (PR#11982)

From: <Robert.McGehee_at_geodecapital.com>
Date: Thu, 07 Aug 2008 11:28:57 +0200 (CEST)


R-developers,
The results below are inconsistent. From the documentation for is.numeric, I expect FALSE in both cases.

> x <- data.frame(dt=3DSys.Date())
> is.numeric(x$dt)
[1] FALSE
> sapply(x, is.numeric)
  dt
TRUE ## Yet, sapply seems aware of the Date class
> sapply(x, class)
  dt
"Date"

Thanks,

Robert McGehee, CFA
Geode Capital Management, LLC
One Post Office Square, 28th Floor | Boston, MA | 02109 Tel: 617/392-8396 Fax:617/476-6389
mailto:robert.mcgehee_at_geodecapital.com

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