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...tween two variables: 1. X versus Y 2. X versus Y(with a 3 steps lag) I would like to test if the correlation increase/decrease from 1 to 2 is significant or not. Is there any function in R to do this? any hints? Thanks for help :) David Ria?o Center for Spatial Technologies and Remote Sensing (CSTARS) University of California 250-N, The Barn One Shields Avenue Davis, CA 95616-8527 USA 1-(517) 629-5499 http://www.cstars.ucdavis.edu/~driano/index.html http://www.cstars.ucdavis.edu

...but it says the maximum allowed is 1024gb (1/2 of what I have!) Can R not use more than 1GB on an XP box? I noticed I had ~600mb left over after R conked out, so clearly I had more memory... What about virtual memory? --j -- Jonathan Greenberg Graduate Group in Ecology, U.C. Davis http://www.cstars.ucdavis.edu/~jongreen http://www.cstars.ucdavis.edu AIM: jgrn307 or jgrn3007 MSN: jgrn307 at msn.com or jgrn3007 at msn.com

...rly format the .Rd files? Thanks! I want a basic set of .Rd files that I can update as I go, but as with most things my documentation typically lags behind my coding by a few days. --j -- Jonathan A. Greenberg, PhD Assistant Project Scientist Center for Spatial Technologies and Remote Sensing (CSTARS) Department of Land, Air and Water Resources University of California, Davis One Shields Avenue Davis, CA 95616 Phone: 415-763-5476 AIM: jgrn307, MSN: jgrn307 at hotmail.com, Gchat: jgrn307

...ng R read the lines of the data as I am running the process, rather than trying to load the whole image into memory at once? Thanks! For those of you with remote sensing experience, I'm using RSI's ENVI package. --j -- Jonathan Greenberg Graduate Group in Ecology, U.C. Davis http://www.cstars.ucdavis.edu/~jongreen http://www.cstars.ucdavis.edu AIM: jgrn307 or jgrn3007 MSN: jgrn307 at msn.com or jgrn3007 at msn.com

...dbin to "fast forward" N x M + 1 samples to the beginning of the B matrix, and then read/define the B matrix exclusively, or do I have to read the entire file into memory, then subset out the B matrix?) Thanks! --j -- Jonathan Greenberg Graduate Group in Ecology, U.C. Davis http://www.cstars.ucdavis.edu/~jongreen http://www.cstars.ucdavis.edu AIM: jgrn307 or jgrn3007 MSN: jgrn307 at msn.com or jgrn3007 at msn.com

...If so, how do I do that? Also, update.packages() works for some packages, but not all -- it often fails in the compilation. I have g77 installed, as well as gnome. --j :::::::::::::::::::::::::::::::::::::::::::::::::::::::::: Jonathan Greenberg Graduate Group in Ecology, U.C. Davis http://www.cstars.ucdavis.edu/~jongreen http://www.cstars.ucdavis.edu AIM: jgrn307 :::::::::::::::::::::::::::::::::::::::::::::::::::::::::: -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html Send &quo...

...m trying to redirect where temporary files go under R to D:\temp\somerandomname from its default (C:\Documents and Settings\username\Temp\somerandomname) -- how do I go about doing this? --j -- Jonathan A. Greenberg, PhD Postdoctoral Scholar Center for Spatial Technologies and Remote Sensing (CSTARS) University of California, Davis One Shields Avenue The Barn, Room 250N Davis, CA 95616 Cell: 415-794-5043 AIM: jgrn307, MSN: jgrn307 at hotmail.com, Gchat: jgrn307

Dear R users, I have two nonlinear equations, f1(x1,x2)=0 and f2(x1,x2)=0. I try to use optim command by minimize f1^2+f2^2 to find x1 and x2. I found the optimal solution changes when I change initial values. How to solve this? BTW, I also try to use grid searching. But I have no information on ranges of x1 and x2, respectively. Any suggestion to solve this question? Thanks, Kate

...#39;s favorite text editor for working with R? I'd like to hear from people who are using editors that have some level of direct R interface (e.g. Tinn-R, Komodo+SciViews). Thanks! --j -- Jonathan A. Greenberg, PhD Postdoctoral Scholar Center for Spatial Technologies and Remote Sensing (CSTARS) University of California, Davis One Shields Avenue The Barn, Room 250N Davis, CA 95616 Cell: 415-794-5043 AIM: jgrn307, MSN: jgrn307 at hotmail.com, Gchat: jgrn307

...what is the most efficient way to do this? The substring that I want to split on is multiple characters, if that matters, and it is contained in every element of the character vector. --j -- Jonathan A. Greenberg, PhD Postdoctoral Scholar Center for Spatial Technologies and Remote Sensing (CSTARS) University of California, Davis One Shields Avenue The Barn, Room 250N Davis, CA 95616 Phone: 415-763-5476 AIM: jgrn307, MSN: jgrn307 at hotmail.com, Gchat: jgrn307

...r) so I thought I'd ask here if there's an easy trick to getting where I need to go using on the base package and not needing to write a for-next loop to implement pad0. Thanks! --j -- Jonathan A. Greenberg, PhD Postdoctoral Scholar Center for Spatial Technologies and Remote Sensing (CSTARS) University of California, Davis One Shields Avenue The Barn, Room 250N Davis, CA 95616 Cell: 415-794-5043 AIM: jgrn307, MSN: jgrn307 at hotmail.com, Gchat: jgrn307

...e the same thing and I would like to determine which one is noisier. Would it be a good measure of the noise in each time series the absolute lag difference? Is this a good measure? Any other measure I could use? Thanks for help :) David Riano Center for Spatial Technologies and Remote Sensing (CSTARS) University of California 250-N, The Barn One Shields Avenue Davis, CA 95616-8527 USA 1-(517) 629-5499 http://www.cstars.ucdavis.edu/~driano/index.html http://www.cstars.ucdavis.edu

...twd(), but this strips the trailing path separator. How do I go about querying the correct path separator for the system, so I can include it in a paste command (via sep=)? Thanks! --j -- Jonathan A. Greenberg, PhD Assistant Project Scientist Center for Spatial Technologies and Remote Sensing (CSTARS) Department of Land, Air and Water Resources University of California, Davis One Shields Avenue Davis, CA 95616 Phone: 415-763-5476 AIM: jgrn307, MSN: jgrn307 at hotmail.com, Gchat: jgrn307

...sense? Is there a better way of doing this? When I ran this on the data, you see a nice, nearly parabolic relationship around what the threshold appears to be of p-value vs. threshold. --j -- Jonathan A. Greenberg, PhD Postdoctoral Scholar Center for Spatial Technologies and Remote Sensing (CSTARS) University of California, Davis One Shields Avenue The Barn, Room 250N Davis, CA 95616 Cell: 415-794-5043 AIM: jgrn307, MSN: jgrn307 at hotmail.com, Gchat: jgrn307

...t going to work out properly. Thoughts? I've never worked with multiple response statistics before, so I'm mostly trying to get some pointers on where to begin investigating... --j -- Jonathan A. Greenberg, PhD Postdoctoral Scholar Center for Spatial Technologies and Remote Sensing (CSTARS) University of California, Davis One Shields Avenue The Barn, Room 250N Davis, CA 95616 Cell: 415-794-5043 AIM: jgrn307, MSN: jgrn307 at hotmail.com, Gchat: jgrn307

...It seems most (if not all) of the kriging packages I'm finding for R take the x,y,z location as the inputs and calculate these distances themselves. Thanks! Sincerely, Jonathan Greenberg -- Jonathan A. Greenberg, PhD Postdoctoral Scholar Center for Spatial Technologies and Remote Sensing (CSTARS) University of California, Davis One Shields Avenue The Barn, Room 250N Davis, CA 95616 Cell: 415-794-5043 AIM: jgrn307 MSN: jgrn307 at hotmail.com

...return() } in the code proper, and put together the package using package.skeleton() and R CMD build. I'm guessing there's a better way to do this -- any suggestions? --j -- Jonathan A. Greenberg, PhD Postdoctoral Scholar Center for Spatial Technologies and Remote Sensing (CSTARS) University of California, Davis One Shields Avenue The Barn, Room 250N Davis, CA 95616 Phone: 415-763-5476 AIM: jgrn307, MSN: jgrn307 at hotmail.com, Gchat: jgrn307

...sts) { ... } I'm hoping this can be done with a single line, so the user doesn't have to pre-construct the data.frame before running the function, if at all possible. Thanks! --j -- Jonathan A. Greenberg, PhD Postdoctoral Scholar Center for Spatial Technologies and Remote Sensing (CSTARS) University of California, Davis One Shields Avenue The Barn, Room 250N Davis, CA 95616 Phone: 415-763-5476 AIM: jgrn307, MSN: jgrn307 at hotmail.com, Gchat: jgrn307

Is there an option to draw concentration ellipses in biplots ? It seems really nice to summarize large number of points of each group. Cheers../ Murli

...know how to superimpose that histogram on a similar plot, such as the following: groups = as.factor(c(rep(1,2), rep(2,4), rep(3,4))) s.arrow(dfxy=nipmat$co[,1:2]*8, sub="Day 10", possub="bottomleft", csub=3) s.class(dfxy=nipmat$li[,1:2], fac=groups, cellipse=2, axesell=F, cstar=0 , col=c(2:3), add.plot=T) I can create the histogram using: plot(nipmat$eig/sum(nipmat$eig), type='h') but I don't know how to superimpose it on the above graph. Thanks for any help! Best, Jennie Jennie Lavine PhD Candidate Center for Infectious Disease Dynamics Penn State Uni...