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...hings 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

...o another apply function to get the mean, since they differ from row to row. I also tried: apply(matrix,1,mean,na.rm=T,trim=.05)) and the trim argument was simply ignored Stumped. Any help appreciated. Thanks. Jim Bouldin, PhD Research Ecologist Department of Plant Sciences, UC Davis Davis CA, 95616 530-554-1740

...values within each column (i.e. A[1,1] A[3,2] and A[3,3] would all be set to one, and subsequent values in those columns would increase by one, until the last non-NA value is reached, if any). Any ideas? Thanks Jim Bouldin, PhD Research Ecologist Department of Plant Sciences, UC Davis Davis CA, 95616 530-554-1740

...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

...7.406977/7.5 [1] 0.987597 > b = mean(replicate(1000000,(sample(x, 3))));b # (1 million samples from x, of size 3, not weighted this time; the mean should be 6.50) [1] 6.501477 > 6.501477/6.5 [1] 1.000227 Jim Bouldin, PhD Research Ecologist Department of Plant Sciences, UC Davis Davis CA, 95616 530-554-1740

...ivision of Biostatistics (Medicine) and (530) 752-7368 | | Department of Applied Science (Engineering) | | Co-Director of IDAV FAX: (530) 752-8894 | | University of California, Davis E-mail: dmrocke at ucdavis.edu | | Davis, CA 95616-8553 www.cipic.ucdavis.edu/~dmrocke |

...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

...ultiple 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

...NA NA NA NA NA NA NA NA etc IF I solve these problems, will I in fact be able to perform individual linear regressions on the (numerous) collections of 5 to 10 rows? Thanks as always for any insight. Jim Bouldin Research Ecologist Department of Plant Sciences, UC Davis Davis CA, 95616 530-554-1740

...ant to calculate the APSP (all pair shortest path) matrix only for these 500 nodes. I would appreciate any help. Thanks in advance Dinesh -- Dinesh Kumar Barupal Research Associate Metabolomics Fiehn Lab UCD Genome Center 451 East Health Science Drive GBSF Builidng University of California DAVIS 95616 http://fiehnlab.ucdavis.edu/staff/kumar [[alternative HTML version deleted]]

...reshape this matrix into this format X Y Z A 1 B 2 C 3 Thanks in advance for your help. Dinesh -- Dinesh Kumar Barupal Junior Specialist Metabolomics Fiehn Lab UCD Genome Center 451 East Health Science Drive GBSF Builidng University of California DAVIS 95616 http://fiehnlab.ucdavis.edu/staff/kumar [[alternative HTML version deleted]]

...[1] "a" "b" "c" "d" "g" "h" "i" Thank you for the help. Greg -- Greg Hirson ghirson at ucdavis.edu Graduate Student Agricultural and Environmental Chemistry 1106 Robert Mondavi Institute North One Shields Avenue Davis, CA 95616

...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

I have very large data sets given in a format similar to d below. Converting these to a data frame is a bottleneck in my application. My fastest version is given below, but it look clumsy to me. Any ideas? Dieter # ----------------------- len = 100000 d = replicate(len, list(pH = 3,marker = TRUE,position = "A"),FALSE) # Data are given as d # preallocate vectors pH =rep(0,len) marker

..."-446828" "854736" So far so good, but columns 1:2 will not coerce to either numeric or integer, for unknown reasons. Thanks for any help (and/or suggestions on a better way to code this). Jim Bouldin, PhD Research Ecologist Department of Plant Sciences, UC Davis Davis CA, 95616 530-554-1740

...ix is transposed, then how to get the output in which First raw present the variable name. It will be great help for my research. Dinesh -- Dinesh Kumar Barupal Research Associate Metabolomics Fiehn Lab UCD Genome Center 451 East Health Science Drive GBSF Builidng University of California DAVIS 95616 http://fiehnlab.ucdavis.edu/staff/kumar [[alternative HTML version deleted]]

...2, sum) : dim(X) must have a positive length" when > dim(a) [1] 5 6 What is the trick to calculating summary values from rows or columns containing NAs? Drives me nuts. More nuts that is. Thanks. Jim Bouldin, PhD Research Ecologist Department of Plant Sciences, UC Davis Davis CA, 95616 530-554-1740

...s.vector(c(1:12));x [1] 1 2 3 4 5 6 7 8 9 10 11 12 > mode(x) [1] "numeric" > sample(x, 3) Error in sample(x, 3) : .Random.seed is not an integer vector but of type 'list' > Jim Bouldin, PhD Research Ecologist Department of Plant Sciences, UC Davis Davis CA, 95616 530-554-1740

...bitmap.c:122: structure has no member named 'jmpbuf' make[4]:*** [rbitmap.lo] Error 1 Has anyone encountered this problem? Any solutions? Is there are compiled binary somewhere that I could use? Grateful for any help. Richard Richard Kerr, Quantitative Geneticist MMI Genomics Davis, CA 95616 richard.kerr at mmigenomics.com (desk) 530-297-2938

I'm looking for an R function that simply recodes a quantitative variable into a number of classes according to specified break-points. Obviously I can do this using nested ifelse() commands, but I want to write it into a function where I can't pre-specify the number of classes. Is there an obvious way to do this? An example to clarify: how to convert c(0,10,5,1,9,6) to