Hi Gerrit, Thanks for your advice.
In; 2.4 Logical vectors http://cran.r-project.org/doc/manuals/R-intro.html#R-and-statistics It states:- The logical operators are <, <=, >, >=, == for exact equality and != for inequality ........ > # exact equality != # inequality I did follows; > x <- 1:5 > x [1] 1 2 3 4 5 > temp <- x != 1 > temp [1] FALSE TRUE TRUE TRUE TRUE That is correct. > rm(temp) > > temp <- x > 1 > temp [1] FALSE TRUE TRUE TRUE TRUE That seems not correct. My understanding is; > [1] TRUE FALSE FALSE FALSE FALSE B.R. Stephen L ----- Original Message ---- From: Gerrit Eichner <[email protected]> To: Stephen Liu <[email protected]> Cc: [email protected] Sent: Thu, November 4, 2010 2:34:55 PM Subject: Re: [R] Logical vectors On Wed, 3 Nov 2010, Stephen Liu wrote: [snip] > 2) >> x > [1] 1 2 3 4 5 >> temp <- x > 1 >> temp > [1] FALSE TRUE TRUE TRUE TRUE > > > Why NOT >> temp > [1] TRUE FALSE FALSE FALSE FALSE > > ? Maybe because of the definition of ">" (greater (!) than)? Or do you expect 1 to be greater than 1 and not greater than 2, 3, 4, and 5? Regards -- Gerrit --------------------------------------------------------------------- AOR Dr. Gerrit Eichner Mathematical Institute, Room 212 [email protected] Justus-Liebig-University Giessen Tel: +49-(0)641-99-32104 Arndtstr. 2, 35392 Giessen, Germany Fax: +49-(0)641-99-32109 http://www.uni-giessen.de/cms/eichner --------------------------------------------------------------------- ______________________________________________ [email protected] mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
