[R] package for stochastic frontier models?

I need to estimate maximum tree crown radius and am looking for a package to prepare stochastic frontier models in R. I have not found any package references on Nabble R help, google, or R help. Any tips on a package for this? With regards, Aaron Trowbridge Researcher BV Research Centre Smith

Re: [R] Great looking plot - but what does it mean?

You might want to google "box and whisker plot". mika03 wrote: > > > http://www.nabble.com/file/p14668788/paragraphs.png > > Hi, > > R is is world full of wonders... I created the attached plot, and I think > it's exactly what I need! Well, actually I think it is more that wht I > need...

Re: [R] How to take the ave of two rows in a data frame

Would ?aggregate help? affy snp wrote: > >> Dear list, >> I have a data frame like: >> >> > log2.ratios[1:3,1:4] >>ID a1 a2 a3 >> 1 GS1-232B23 -0.0207500 0.17553833 0.21939333 >> 2 RP11-82D16 -0.1896667 0.02645167 -0.03112333 >> 3

Re: [R] Re commended textbooks for R?

I am currently using: ---John Maindonald and John Braun. Data Analysis and Graphics Using R--- and find it very useful, note that there now is a 2007 edition. Most of the texts mentioned in the previous link have reviews on Amazon. Jared O'Connell-2 wrote: > > This page may be helpful :) > >

Re: [R] windows vista

If the administrator account does not exist, this info provided for another software program I use may be helpful: "Some Windows Vista installations may have the Administrator account turned off. If so, it is easy to turn the true Administrator account on. To do so, open the Control Panel and ope

Re: [R] rowMean, specify subset of columns within Dataframe?

Original Message- > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] > On Behalf Of aaront > Sent: Monday, 26 November 2007 6:02 AM > To: r-help@r-project.org > Subject: [R] rowMean, specify subset of columns within Dataframe? > > > I would like to calculate the m

[R] rowMean, specify subset of columns within Dataframe?

I would like to calculate the mean of tree leader increment growth over 5 years (I1 through I5) where each tree is a row and each row has 5 columns. So far I have achieved this using rowMeans when all columns are numeric type and used in the calculation: Data1 <- data.frame(cbind(I1 = 3, I2 = c(0

Re: [R] Changing axis scale

xlim(),ylim() so, ylim(2000,3000) mysimbaa wrote: > > Hello R users, > > Is it possible after making a plot(x,y) to change axis scale? > For example : I have a range of 0 to 3000 in my y-axis and I want to make > a zoom between 2000 and 3000. > > > Thanks for any help. > -- View this me