« Seven Quick Takes: Blogger's Block Edition | Main | Dear Anneleisa »

August 21, 2009

Comments

Feed You can follow this conversation by subscribing to the comment feed for this post.

What's wrong with that paragraph? Suppose you had two vectors x and y, both with some missing values, and you wanted the logical expression x == y. Then your logical vector can contain three values: yes, the i-th value of x is the same as the i-th value of y; no, the i-th value of x is the different from the i-th value of y; and No Answer, because either x or y is missing. The expression x == NA is just the special case where all the values of y are missing, just like x == 0 is the special case where all of the values of y are zero.

I mean, doy.

I am totally telling Mom you're being mean to me again.

The comments to this entry are closed.

Welcome

Enter your email address:

Delivered by FeedBurner