[R] trouble with cumsum?

[Makram Talih]

Dear R users,

I am using R version 2.0.1 (2004/11/15) on an i386-pc-mingw32 platform. I
encounter the following problem while using cumsum:

> a <- rep(0.01, 100)
> b <- cumsum(a)
> sum(a) == 1
[1] TRUE
> b[100] == 1
[1] FALSE

Am I missing something? Should cumsum have such an outcome?

Thanks in advance for any clarifications any of you can offer.

Regards,

Makram Talih

--
Makram Talih, Ph.D.
Assistant Professor
Department of Mathematics and Statistics
Hunter College of the City University of New York
695 Park Avenue, Room 905 HE
New York, NY 10021

Website: http://stat.hunter.cuny.edu/talih
E-mail: talih at math.hunter.cuny.edu
Tel: 212-772-5308
Fax: 212-772-4858