similar to: How to avoid ifelse statement converting factor to character

Hi R-helpers, I am trying to use this ifelse statement to recode a variable: > data$SOCIAL_STATUS<-ifelse(data$SOCIAL_STATUS=="B" & data$MALE>4, "C", "B") (i.e., if social status is B and there are more than 4 males, then recode social status to C; otherwise, leave it B) But, it's not working. See the below R output. Notice that there were 71

Hi, My data.frame "A" has FID like this FID a a b b b c c d d d d Now my second data.frame "B" has age value for a, b, c, d like FID Age a      5 b      7 c      9 d      3 How can search for the Age column in "B" and replace the values in "A" so that my new "A" looks like this FID Age a      5 a      5 b      7 b      7 b      7

Hi R-helpers, I would like to subset my dataframe, keeping only those rows which satisfy the following conditions: 1) the string "dnv" is found in at least one column; 2) the value in the column previous to the one "dnv" is found in is not "0" Here's what my data look like: ??? POND_ID 2009-05-07 2009-05-15 2009-05-21 2009-05-28 2009-06-04 4 ? ? ? 101 ? ? ?

Dear R-helpers, I have split a dataframe into a list with five elements, with the following code: > datalist<-split(data,data$UNIT) I would now like to run some code (below) on each element of the list to extract rows from the list elements; then I would like to rbind the extracted rows into a new dataframe containing all of the extracted rows from all of the list elements. I don't

Hi all, I am interested in performing a cluster analysis on ecological data from forests in Pennsylvania. I would like to develop definitions for forest types (red maple forests, upland oak forests, etc.(AH AR in attached table)) based on measured attributes in each forest type. To do this, I would like to 'draw clusters' around forest types based on information from various tree

After reading the help files (?Startup) and using RSiteSearch("defaultPackages"), I have been trying to add several packages to my default startup list using the following code: local({ old<-getOption("defaultPackages") options(defaultPackages=c(old,"lattice","RODBC") }) Subsequently, when I query the default list using:

Dear List, I have hit this problem with using a plotmath expression in an axis label on a lattice plot I'm including in a Sweave document. The actual document is far too long and boring (unless you are interested in the hydrochemistry of upland lakes) to include here, but the following minimal example reproduces the problem; basically, the PDF produced by Sweave has missing characters in the

Basically, to legally broadcast music you must: A) Obtain permissions from the copyright holder (usually the publisher, record label) of the *composition*. ASCAP, BMI, and SESAC offer compulsory licenses for all of the artists they represent, fees based upon roughly how many listeners your station has & how many songs in your broadcast are by artists/composers they represent. B) Obtain

Hi, I want to use map("state") and have the ecoregion shape (please see link) file projected onto this. ftp://ftp.epa.gov/wed/ecoregions/cec_na/NA_CEC_Eco_Level3.zip ftp://ftp.epa.gov/wed/ecoregions/cec_na/NA_CEC_Eco_Level3.zip Could someone please show me how; I have never messed with this sort of thing. Thanks. -- View this message in context:

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SuSE10.2 Linux Kernel 2.6.18 Patched, Whenever I try to establish a connection raccoon fails giving the following error. Raccoon config ################# remote 67.101.176.*** { exchange_mode main,aggressive; doi ipsec_doi; situation identity_only; my_identifier address; send_cr off; send_cert off; lifetime time 2 min;

I am running R 2.6.0 on a PC running MS Windows 2000 Professional. After upgrading to this new version of R, I have been having problems opening scripts: opening certain scripts result in R crashing. After some experimentation, I discovered that it is a problem with the number of subdirectories in the path. For example, if the script is located in c:\Documents and