search for: wollenberg

...just A, C, and D. When I copy these columns to a new data frame >newDF <- data.frame(cbind(oldDF$A, oldDF$C, oldDF$D)) all the factor data comes out as levels rather than the original factors. How do I preserve the factors when I copy from one data frame to another? Thanks vary much, Kurt Wollenberg, Ph.D. Tufts Center for Vision Research Tufts-New England Medical Center 750 Washington St #450 Boston, MA 02111 Office: 617-636-9028 Fax: 617-636-8945 email: kurt.wollenberg at gmail dot com

...ign1.F[names(summary(align1[[i]])),i] <- (summary(align1[[i]])/length(align1[[i]])) Is there a more efficient (i.e., without a loop) way to do this? Is there some way to use table or ftable to create an 22 x 236 table of amino acid frequencies from align1 and AA in one fell swoop? Thanks, Kurt Wollenberg, PhD Tufts Center for Vision Research New England Medical Center 750 Washington St, Box 450 Boston, MA, USA kwollenberg at tufts-nemc.org 617-636-8945 (Fax) 617-636-9028 (Lab) The most exciting phrase to hear in science, the one that heralds new discoveries, is not "Eureka!" (I found...

...s section, even though they contain all other recent changes. My detail section looks like this: \details{blah blah blah \deqn{blah = Blah}{% blah = Blah} where \eqn{blah}{%blah} = frequency of \emph{b} in Blah. Blah blah blah. } Any help would be greatly appreciated. Cheers, Kurt Wollenberg, PhD Tufts Center for Vision Research New England Medical Center 750 Washington St, Box 450 Boston, MA, USA kwollenberg at tufts-nemc.org 617-636-8945 (Fax) 617-636-9028 (Lab) The most exciting phrase to hear in science, the one that heralds new discoveries, is not "Eureka!" (I found...

...on and using summary(alignment[[i]]) or do I need a separate data frame? If I should be using a separate data frame for symbol frequencies how do I extract these from the data? Should I try to extract this from summary or is there a more efficient way to calculate symbol frequencies? Thanks, Kurt Wollenberg, PhD Tufts Center for Vision Research New England Medical Center 750 Washington St, Box 450 Boston, MA, USA kwollenberg at tufts-nemc.org 617-636-8945 (Fax) 617-636-9028 (Lab) The most exciting phrase to hear in science, the one that heralds new discoveries, is not "Eureka!" (I found...

...MASS I've figured out how to do the multiplication efficiently (without loops) but I can't seem to solve the wrapping problem. Is there an efficient method for making vector multiplication wrap around the end of the matrix? I'm using R-2.0.0 running on Windows XP Pro 2002. Cheers, Kurt Wollenberg, PhD Tufts Center for Vision Research New England Medical Center 750 Washington St, Box 450 Boston, MA, USA kwollenberg at tufts-nemc.org 617-636-8945 (Fax) 617-636-9028 (Lab) The most exciting phrase to hear in science, the one that heralds new discoveries, is not "Eureka!" (I found...