Dear Erin, -0.50 is greater than -1.00, this means that your logical test returns all FALSE answers. Now consider the results of:
x[FALSE] you are selecting none of 'x', hence numeric(0). Perhaps you mean: x[x <= -0.50 & x >= -1.0] HTH, Josh On Sat, Aug 28, 2010 at 7:47 PM, Erin Hodgess <erinm.hodg...@gmail.com> wrote: > Dear R People: > > I just produced the following: > > x <- seq(-3,3,.01) > x[x>= -0.50 & x<= -1.0] > numeric(0) > x[x>= -0.50 && x<= -1.0] > numeric(0) > > What am I doing wrong, please? This seems strange. > > Thanks, > Erin > > > -- > Erin Hodgess > Associate Professor > Department of Computer and Mathematical Sciences > University of Houston - Downtown > mailto: erinm.hodg...@gmail.com > > ______________________________________________ > R-help@r-project.org 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. > -- Joshua Wiley Ph.D. Student, Health Psychology University of California, Los Angeles http://www.joshuawiley.com/ ______________________________________________ R-help@r-project.org 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.
