similar to: FW: computing a p-value ...

I've been presented with a problem where I don't have the raw data, but I do have summary data. Specifically, I have a response that takes values from 0 thru 10, and a factor that has 5 levels (unordered) ... I have a mean and std dev for each of the 5 levels and need to obtain a p-value indicating whether there is evidence of a difference between these means. Mean

Hi all, I''ve been having trouble for a long time with backgroundrb processes that suddenly vanish without a trace. What happens is that at some point I discover that all the backgroundrb processes are suddenly gone. Nothing special is seen in any of the log files. This has happened intermittently for a long time, and I was hoping that upgrading to 1.0.4 would somehow help me out, but

Greetings: I'm still working on functions to make it easier for students to interpret regression predictions. I am working out a scheme to more easily create "newdata" objects (for use in predict functions). This has been done before in packages like Zelig, Effects, rms, and others. Nothing is "exactly right," though. Stata users keep flashing their "predicted

Dear Rweavers, When generating reports with Sweave, I would like to quote some results in the abstract (Something like "The treatment effect is 10 mbar, see page 100). Currently, I used verbatimwrite and friends to write to multiple files to be included, but I wonder is there is a more elegant method for such accumulated forward references in one file similar to toc creation. Sorry if

I downloaded and installed R-1.3.1 yesterday, and had to change line 2 of the "packages.html" file in $RHOME/doc/html/ The configuration steps were "the usual", tar zxvf ... cd ... ./configure make make check make install If it's relevant, Sys.info() sysname release "Linux" "2.2.14"

Dear R users and developers After upgrading to Windows XP and R 1.9.1 and 2.0, I retried to execute plot.baysian() to a data set that I had used previously to plot with no problem in win2000 R1.8. The error I get is: Error in points(Mbar[-index], lods[-index], pch = ".") : only 0's may mix with negative subscripts Thanx in advance Dino P.S. I allready sent this message

I sent this to the list last week, and haven't seen it pop up. Either I deleted it when it did appear, or possibly it was destroyed as spam...? If it did appear and I somehow missed it, appologies. In a nutshell, can the function FUN supplied to by() deduce what level of factor by() was on when FUN was called? I've been digging through the functions, and can't see where the

Hello, I'm new in R. I'm meteorological modeller and i will calculate some statistics for my model results. These statistis are the follow: ANB: Average Normalized Absolute BIAS MNB: Mean Normalized BIAS MNE: Mean Normalised Error STDE: Standard Deviation of Error FB: Fractional BIAS MG: Geometric Mean BIAS VG: Geometric Variance SKVAR: Skill Variance RMSE: Root Mean Square Error NMSE:

Hi, I am a new user of "R", I am trying to read my data in.. "Cervixhc.dat" used to be in a different directory, now it has been moved to "O:\E&s\APC cervix FINAL (YG,MC,MD)\Manuscript\Data", but when I ran the following program (in red) I got an error message "Error in setwd(dir) : cannot change working directory", and "Error in file(file,

My question is: is there a way for Rtangle() to *not* print re-used code chunks? It'd be easy enough to brew up a perl script to do just this, but if methods exist already, I'd rather use them. My reading of the help pages and FAQs has missed something, if it's there. Background: I have course notes on R, written using Sweave. I want to provide the R code separately so the

Sorry for the off-topic question, but I know there are some talented LaTeX users out there. Which bibliography style gives only the year in text citations (e.g "for further details, see Anderson (1992)" )? Thanks Jason -- Indigo Industrial Controls Ltd. http://www.indigoindustrial.co.nz 64-21-343-545 jasont at indigoindustrial.co.nz

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Hi, I am having problem with R misinterpreting (x,y) values in image(). I downloaded the followiing binary version of R: > version _ platform i686-pc-linux-gnu arch i686 os linux-gnu system i686, linux-gnu status major 1 minor 3.0 year 2001 month 06 day 22 language R > q() [janef@cc-jainlabx1 Poster.tahoe]$ gcc -v Reading specs from

Whoops. Found it at my favorite site... (modifications courtesy of Frank Harrell) http://finzi.psych.upenn.edu/R/Rhelp/archive/10946.html I'm pleading decaf as an excuse for not thinking of it sooner. Now returning you to your regularly scheduled mailing list. Jason -- Indigo Industrial Controls Ltd. 64-21-343-545 jasont at indigoindustrial.co.nz

Just starting with lattice & grid, so pardon if this question scrams of someone still wrapping their head around it. (Paul Murell, Deepayan Sarkar, et. al - great package!). Is it possible to set an equivalent of the "range" argument to boxplot() when using bwplot()? Cheers Jason -- Indigo Industrial Controls Ltd. 64-21-343-545 jasont at indigoindustrial.co.nz

Probably doing something wrong here. I'm getting an empty file called "Rplot.ps" when I do this: > foo<-rnorm(100) > postscript() > boxplot(foo) System info: Version: platform = i586-pc-linux-gnu arch = i586 os = linux-gnu system = i586, linux-gnu status = major = 1 minor = 2.2 year = 2001 month = 02 day = 26 language = R Search Path: .GlobalEnv,

On Thu, 18 Apr 2002 ripley@stats.ox.ac.uk wrote: > On Thu, 18 Apr 2002, Martin Maechler wrote: > > > >>>>> "Jason" == Jason Turner <jasont@indigoindustrial.co.nz> writes: > > > > Jason> strptime() mysteriously adds a day to a date, unless the year > > Jason> is specified. Tested on: > > Jason> Linux (RedHat

Newbie question: When upgrading (currently doing 1.1.1 to 1.2.1), do I have to rebuild all packages as well? For example, I use RODBC and netCDF a lot. Thanks Jason -- Indigo Industrial Controls Ltd. 64-21-343-545 jasont at indigoindustrial.co.nz -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- r-help mailing list -- Read

Hi all I'm trying to create a three-dimensional wireframe-type plot, much like the screenshot shown at http://www.r-project.org/screenshots/volcano-persp.jpg In my case, I'm trying to show a density estimate of two-variable system, using the GenKern package. I've used the image() and contour() to create a nice shaded plot, but I've found a 3d plot is often easier for the

I'm using spec for multivariate time series, and have a question about "coh". This is probably a very silly question, but I'm a bit stumped. >From the documentation: Column i + (j - 1) * (j - 2)/2 of coh contains the squared coherency between columns i and j of x, where i > j. What's in column 1 of coh? Cheers Jason -- Indigo Industrial Controls Ltd.