similar to: created data doesn't remain when split...

I've been trying to figure out how to prevent a column that is the result of an aggregate function call so that I can use it in further calculations. For example, I would like to aggregate the expf for the data.frame by sp (character) and dbh (double d=rounded to integer) using the command: > st2 <- aggregate( ntrs$expf, by=list(sp=ntrs$sp,dbh=ntrs$dbh), sum ) > st2$expf <- st2$x

Can someone tell me why this is since I can't seem to find an explination in the docs or FAQ for this. Since there are no "BM" in the mtrs data.frame, but only in the "parent" data.frame (trees), I'm assuming the subset data.frame is still associated with the original. Is that correct and how would I create a completly separate data.frame since I'll be using by,

I've been developing a package and have been getting the following warning when running the check command: * checking S3 generic/method consistency ... WARNING plot: function(x, ...) plot.summaries: function(trees, sp) * checking for replacement functions with final arg not named 'value' ... OK * checking Rd files ... OK ...blah, blah, blah... * checking examples ... OK *

R gurus: I'm thinking about using R for website traffic analysis but didn't find anything in my web searches specific to R. If I have the webpages (simple example would contain something like three (3) static pages with a couple of links each) and parse the apache access log file (httpd-access.log), then I can populate the graph representing the website and perform whatever analysis I

I've been working on a LaTeX document that contains Sweave code and cannot get MikTeX to find the Sweave.sty file. I've added the c:\rw1081\share\texmf path in the MikTeX roots (I've ven added the path in the environment variables ) but to no avail. Is there a trick to getting Sweave installed correctly when using MikTeX on Windows XP? Do I need to move/copy the Sweave.sty file to the

I've been trying to plot the predicted values, as a line, over the data for a simple nonlinear fit with the following commands: plot( hg ~ ht ) ... define some function hg ~ ht + junk ... ... blah, blah, obtain parameter estimates and predicted values, blah... ... then... lines( sort( $predicted ) ~ sort( ht ) ) which results in a line that isn't smooth (which I knew would happen).

When I tried to read all the entries (after searching the FAQ) for "row names xtable", I get START-INFO-DIR-ENTRY * R FAQ: (R-FAQ). The R statistical system ... ... xtable* Export data to LaTeX and HTML tables. ... For dropping the row names of a matrix `x', it may be easier to use `rownames(x) <- NULL', similarly for column ...

After trying to find if there was a color picker in the FAQs and the help, I thought I would send a post here. I was overwhelmed with all the wonderful color choices R has predefined (discovered after typing in colors()) but can't figure out what they all (by name) look like. Is there a color picker or some other method to display all those colors next to the name? I think I can put together

I've been trying to figure out how to accomplish the following... I've got a list (returned from a function) and I would like to "cbind()" the lists together to create a "cross tab" report or simply bind them together somehow the function returns a list that looks like the following: > all$BM $species [1] "BM" $vbar.nobs [1] 3 $vbar.sum [1] 54.05435

I'm trying to update a package and would like to crush a WARNING message for a clean build. I've been struggling with this question and haven't gotten any traction on the web either. I've got a document file (Rd) that contains the following \usage statement: \name{sample.data} \alias{sample.data} \title{CONIFERS forest growth model sample data} \description{ A list object of

I've got a newbie question and I got a little lost in the "table helps". I've got a data.frame I would like to summarize as a (and pardon for the lack of correct vernacular) data collection matrix. My data looks like, stand siteindex age acres pct.acres 1 232 116 45 8477.3105 0.56159458 2 234 121 25 11120.1530 0.73667441 3 235 132 25

I've got a package I would like to send out for testing and have noticed a "problem" with the \tabular portion of the help "compiler" the code for inserting vertical lines, in the tabular environment, causes the build to choke, but not the check command. C:\>rcmd build --binary -docs=all nlsystemfit \tabular{|l|c|c|c|}{ \hline Method \tab Instruments \tab

I've been trying to create a shlib file (using mingw instead of the cygwin -- after reconfiguring my machine, yet again) and I'm getting the following behaviour that I think is incorrect: When using rcmd shlib and explicitly listing the files to include in the build such as: C:\Sequential\Code>rcmd shlib --output=optflikam flikam.c as47.f as154.f as197.f making corrAdaptiveSim.d from

I've been trying to create a shlib file (using mingw instead of the cygwin -- after reconfiguring my machine, yet again) and I'm getting the following behaviour that I think is incorrect: When using rcmd shlib and explicitly listing the files to include in the build such as: C:\Sequential\Code>rcmd shlib --output=optflikam flikam.c as47.f as154.f as197.f making corrAdaptiveSim.d from

I've been attempting to perform some analysis on a model that was interfaced with R (R calls a library that takes SEXPs and converts the data frames into the internal structures of data), and I notice that for small data.frames the vectors don't get corrupt (n<200-ish). When I pass in larger data.frames, the vectors will become corrupt. I've been PROTECTING the heck out of

r-gurus, I couldn't find an answer to this and after an hour or so of trying all types or ways to do this, I've given up for now. I'm having trouble getting the results from xtabs to generate "unsorted" factors. I've generated a sample data.frame I want to create a table from, using xtabs, and the results are presented below, > temp treatment itpa qmd

I'm adding a couple of vignettes to an existing package. When I make a change to the sweave file, and run the check command, c:\conifers\trunk>R CMD check rconifers I get the following message(s) in the 00check.log file: * checking for unstated dependencies in vignettes ... OK * checking package vignettes in 'inst/doc' ... WARNING Package vignette(s) without corresponding PDF:

I'm in the middle of a long overdue package update, and after seeing the CRAN Task Views I thought there would be an entry, in the DESCRIPTIONS file, for that entry that appears on the package webpage. For example, http://cran.case.edu/web/packages/vegan/index.html Since it's been some time since I've updated the package, I did a little reading (R-exts.pdf) and web searching and

R-folks, Is there a function, like aggregate, that allows users to bin values? I've got to break down a data frame into classes of 5cm (or something like it), and I only know how to do it using code like, signif <- symnum( stems$dbh, corr = FALSE, na = FALSE, cutpoints = c(0,10,20,30,40,999), symbols = c(0,10,20,30,40) )

I'm trying to plot a grid over a levelplot print( levelplot( var1.pred~x+y, data=saw.pred, aspect=mapasp(saw.pred), col.regions=terrain.colors(80), main=main) ) using the data... > saw.pred x y var1.pred var1.var sort 1 5 5 3.3761200 256.3363 saw 2 15 5 3.3884142 499.5695 saw 3 25 5 3.5394769