similar to: wicked wikis for R

I am trying to replace a spreadsheet model of a project justification with an R script. I can't seem to track down R functions to calculate Internal Rate of Return and NPV? Am I missing something? NPV doesn't seem so difficult to calculate (at least for a regular series) but I am struggling to identify how to solve for IRR in R. It would be sufficient if it worked for a regular

I have some time stamped events that are supposed to be unrelated. I have plotted them and that assumption does not appear to be valid. http://metrak.com/tmp/sevents.png is a plot showing three sets of events over time. For the purpose of this exercise, the Y value is irrelevant. The series are not sampled at the same time and are not equispaced (just events in a log file). The plot is

What is the recommended way to convert/coerce and integer to a POSIXct please? d <- as.POSIXct(Sys.Date()) i <- as.integer(d) as.POSIXct(i) Error in as.POSIXct.default(i) : do not know how to convert 'i' to class "POSIXlt" This appears to be the behaviour in 2.3.1 and 2.4.0 on windows XP. I have tried searching on this and found as.Date.integer in package zoo which

I feel that as long as people continue to provide help on r-help wikis will not be successful. I think we need to move to a central wiki or discussion board and to move away from e-mail. People are extremely helpful but e-mail seems to be to always be memory-less and messages get too long without factorization of old text. R-help is now too active and too many new users are asking

When I create a bar plot, the legend is obscuring the rightmost bar. I haven't found a setting that appears to affect the positioning of the legend - any tips re moving the legend would be most appreciated. paul sorenson

Hi all, I just did a brief test with 3 different codec combinations: 1) ffmpeg sorenson/flv, mp3 audio in flv container 2) ffmpeg h264/vorbis audio/matroska 3) ogg/theora/vorbis using encoder_example Here are the results: 10721201 2010-10-16 14:46 origem1.flv 20731108 2010-09-13 23:04 origem1.mkv 33101703 2010-10-03 11:24 origem1.ogv as you can see, flv wins hands down, and it doesn't look

on 2/13/02 7:12 AM, Mark Lehrer at mark@knm.org wrote: > > I'd be more interested in information on a native client that can play > Quicktime(Sorenson) on Linux. Does one exist? > > I don't think it's a good idea to support closed standards like > QT, WMA, etc. > > Just my $.02 though, > Mark > > Actually, QTSS supports open source standards:

I guess this isn't so much of a help request as a show-and-tell from a non-statistician homebrewer who has been fumbling around with R. If nothing else it provides yet another data set. I hope it is not out of line. Anyway, the plots I have produced are at http://brewiki.org/BatchSparge#poll The polling method is somewhat simple, its just one of those multiple choice style polls you

Hi all, I am trying to run a cluster analysis using Sorenson (Bray-Curtis) distance measure with flexible beta linkage method. However, I can't seem to find flexible beta in any of the functions/packages I have looked at. Any help would be appreciated. [[alternative HTML version deleted]]

Puppet 3.0.0-rc5 is a feature release candidate for the 3.x series of Puppet. Downloads are available at: * Source http://downloads.puppetlabs.com/puppet/puppet-3.0.0rc5.tar.gz RPMs are available at http://yum.puppetlabs.com Debs are available at http://apt.puppetlabs.com Gems are available via rubygems at https://rubygems.org/downloads/puppet-3.0.0.rc5.gem or by using `gem install --pre

Hi - I''ve searched around and haven''t found anyone who''s implemented a type+provider for configuring network interfaces in puppet. Does anyone have such a thing already running that''s just not on forge / github? I found some prior art (aside from the old ''interface'' type which was deleted in 0.24) but most people seem to use definitions +

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Hello Everyone, I am using Wicked Pdf to generate pdf file. In my model, i have method to generate pdf file. I also need to show image in my pdf file from amazon s3. Case 1: i tried using <img src="amazon/url"> While i am running that method image not displaying, *just a small box only appearing insteat of image*. Case 2: i tried <%= image_tag(@image.avatar)%>

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I have a frame which contains 3 columns: "date" "defectnum" "state" And I want to get the most recent state change for a given defect number. date is POSIXct. I have tried: aggregate(ev$date, by=list(ev$defectnum), max) Which appears to be working except that the dates seem to come back as integers (presumably the internal representation of POSIXct). When I

Dear list, I'd like to use multiple imputations to try and save a somewhat badly mangled dataset (lousy data collection, worse than lousy monitoring, you know that drill... especially when I am consulted for the first time about one year *after* data collection). My dataset has 231 observations of 53 variables, of which only a very few has no missing data. Most variables have 5-10% of

I would like to create a family of barplots with the same xlimits. Is there a way to "read" the xlimits from the first graph so I can apply it to the subsequent ones? I have tried just taking the min and max of the x data and the plot doesn't show. cheers [[alternative HTML version deleted]]

I am using R in Windows. I see that I will have to use batch processes with R. I will have to read and write text files, and run some R code; probably some external code too. I have never done scripting. Is there any document that explains simple steps with examples? I also have heard that Python is a good scripting language. Is it worth the effort? (I do not have too much free time, so if I could