unusual result with "any"

2 messages · Erin Hodgess, Johannes Hüsing

Sun, Nov 1, 2009 8:49 PM #

Dear R People:

I am working with a numeric vector and trying to use the "any"
function.  However, I'm getting some odd results, as shown below:

[1] 0.7305081 2.4224211

num [1:2] 0.73 2.42

[1] FALSE
Warning message:
In any(xy) : coercing argument of type 'double' to logical

What am I doing wrong please?

Thanks in advance,
Sincerely,
Erin

Erin Hodgess
Associate Professor
Department of Computer and Mathematical Sciences
University of Houston - Downtown
mailto: erinm.hodgess at gmail.com

Johannes Hüsing

Sun, Nov 1, 2009 8:59 PM #

Erin Hodgess schrieb:

xy > 1 should return TRUE FALSE, and you want to apply any() to that. 
Thus: any(xy > 1)
any(xy) returns TRUE, as the nonzero numbers are coerced to TRUE
When TRUE is compared with 1, it is coerced to a number (no warning is 
issued here), namely 1.
1 > 1 returns FALSE.