Re: [R] data from graph [SEC=UNCLASSIFIED]
Jam,
If you use fpot the GPD of package evd to calculate your
return periods, you can generate the table you want by
using the following commands:
RP - c(10,100,500,1000) #return periods
rf - your clean vector of rainfall data
thres - the threshold for your data
nopy - number of observations per year
rainf - c()
For(i in 1:length(RP) ){
q = fpot(rf,thres,mper=RP[i],npp=nopy,std.err=FALSE)
rainf[i] - q$estimate[1]
}
#The next line prints the return periods:
plot(RP,rainf,log=x,type=l,ylab=rainfall,xlab=Return Period (yrs) )
#The next line prints the table you want:
cbind(RP,rainf)
Hope it helps,
Augusto
Augusto Sanabria. MSc, PhD.
Mathematical Modeller
Risk Impact Analysis Group
Geospatial Earth Monitoring Division
Geoscience Australia (www.ga.gov.au)
Cnr. Jerrabomberra Av. Hindmarsh Dr.
Symonston ACT 2601
Ph. (02) 6249-9155
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of umarporn charusombat
Sent: Wednesday, 13 June 2007 8:35
To: r-help@stat.math.ethz.ch
Subject: [R] data from graph
hi
i just learn how to use R in my research
i used extreame value package to get the return level of rainfall. the output
i got as the graph plot between return level and period. i wonder how i can
get the value from the graph as a table format. please help me thanks jam
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[R] Extracting a subset from a dataframe
Good day everyone, Can anyone suggest an effective method to solve the following problem: I have 2 dataframes D1 and D2 as follows: D1: dates ws wc pwc 2005-10-19:12:00 10.8 80 81 2005-10-20:12:00 12.3 5 15 2005-10-21:15:00 12.3 3 15 2005-10-22:15:00 11.3 13 95 2005-10-23:12:00 12.3 13 2 2005-10-24:15:00 10.3 2 95 2005-10-25:15:00 10.3 2 2 D2: dates ws wc pwc 2005-02-02:15:00 17.5 5 96 2005-02-19:15:00 20.1 15 97 2005-02-20:18:00 16.5 95 95 2005-03-03:18:00 10.3 95 95 2005-03-04:00:00 13.4 13 95 2005-10-22:15:00 11.3 13 95 2005-10-25:15:00 10.3 2 2 I want to create another dataframe made up of the values of dataframe1 which are not common with dataframe2, ie. newD = D1 - (D1 intersection D2) that is, newD: datesws wc pwc 2005-10-19:12:00 10.8 80 81 2005-10-20:12:00 12.3 5 15 2005-10-21:15:00 12.3 3 15 2005-10-23:12:00 12.3 13 2 2005-10-24:15:00 10.3 2 95 Thanks for any help you can provide, Augusto Augusto Sanabria. MSc, PhD. Mathematical Modeller Risk Research Group Geospatial Earth Monitoring Division Geoscience Australia (www.ga.gov.au) Cnr. Jerrabomberra Av. Hindmarsh Dr. Symonston ACT 2601 Ph. (02) 6249-9155 __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
[R] Software for kriging
Dear R-list members, I wish everyone a happy and successful 2007! Does anyone know of R-based software for optimal spatial prediction (kriging)? We are working on a seismic event characterisation technique and need to do some kriging. Any help would be greatly appreciated. Augusto Augusto Sanabria. MSc, PhD. Mathematical Modeller Risk Research Group Geospatial Earth Monitoring Division Geoscience Australia (www.ga.gov.au) Cnr. Jerrabomberra Av. Hindmarsh Dr. Symonston ACT 2601 Ph. (02) 6249-9155 __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] ML fit of gamma distribution to grouped data
Thomas, The Gamma distr. can be fitted via ML using: Library(MASS) GF - fitdistr(given_data,gamma) sh - GF$estimate[1] ra - GF$estimate[2] Fitting via Moments, m: var - m[2] - m[1]*m[1] sh - m[1]*m[1]/var sc - m[1]/var ra - 1/sc G_pdf - dgamma(breaks,shape=sh,rate=ra,scale=1/ra) Hope it helps, Augusto Augusto Sanabria. MSc, PhD. Mathematical Modeller Risk Research Group Geospatial Earth Monitoring Division Geoscience Australia (www.ga.gov.au) Cnr. Jerrabomberra Av. Hindmarsh Dr. Symonston ACT 2601 Ph. (02) 6249-9155 -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Thomas Petzoldt Sent: Tuesday, 28 November 2006 10:26 To: r-help@stat.math.ethz.ch Subject: [R] ML fit of gamma distribution to grouped data Hello, we have a set of biological cell-size data, which are only available as frequencies of discrete size classes, because of the high effort of manual microscopic measurements. The lengths are approximately gamma distributed, however the shape of the distribution is relatively variable between different samples (maybe it's a mixture in reality). Is there any ML fitting (or moment-based) procedure for the gamma distribution and grouped data already available in R? Here is a small example: breaks - c(0, 20, 30, 40, 50, 60, 70, 80, 90, 100, 150) mids - c(10, 25, 35, 45, 55, 65, 75, 85, 95, 125) counts - c(87, 5, 2, 2, 1, 1, 0, 0, 1, 1) Any help is highly appreciated Thomas P. __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
[R] Empirical CDF
Good day everyone, I want to assess the error when fitting a Gram-Charlier CDF to some data 'ws', that is, I want to calculate: Err = |ecdf(ws) - GCh_ser(ws)| The problem is, I cannot get the F(x) values from the ecdf. 'Summary(ecdf())' returns some of the x-axis values, but how do you get the F(x) values? Thank you for any help you can provide. Regards, Augusto Augusto Sanabria. MSc, PhD. Mathematical Modeller Risk Research Group Geospatial Earth Monitoring Division Geoscience Australia (www.ga.gov.au) Cnr. Jerrabomberra Av. Hindmarsh Dr. Symonston ACT 2609 Ph. (02) 6249-9155 __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
Re: [R] Off topic --- help in locating a source.
Rolf, The formula can be found in section 1.44-1.45 'Trigonometric (Fourier) series' of the famous book: Gradshteyn I.S and Ryzhik I.M. Tables of Integrals, Series, and Products. Academic Press Inc. 4th printing. London 1983. Which is a translation of the Russian book from 1963. Hope it helps, Augusto Augusto Sanabria. MSc, PhD. Mathematical Modeller Risk Research Group Geospatial Earth Monitoring Division Geoscience Australia (www.ga.gov.au) Cnr. Jerrabomberra Av. Hindmarsh Dr. Symonston ACT 2609 Ph. (02) 6249-9155 -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Rolf Turner Sent: Thursday, 18 May 2006 5:27 AM To: r-help@stat.math.ethz.ch Subject: [R] Off topic --- help in locating a source. Apologies for the off-topic question; as usual I'm trying to draw upon the unparalleled knowledge and sagacity of the r-help list. Please reply off-list if you can help me out. A collaborator of mine found a formula we need, on sheets which he had photocopied out of a book, some years ago. He cannot remember which book (he's getting to be as senile and forgetful as I am, poor bloke!). He thinks it was (and it appears to have been) a large encylopedic tome devoted to extensive tables of formulae, integrals and series, and stuff like that. The formula in question is oo 1 1 1 SUM --- cos(k*x) = --- ln () 0 x 2*pi . k=1 k 2 2*(1 - cos(x)) (I.e. the right hand side is a function whose Fourier coefficients are 1/k, k 0). Note that ``oo'' is my attempt to render the infinity symbol in ASCII. Does anyone know of a source where this formula may found/cited? (It doesn't *have* to be the same source from which my collaborator originally copied it!) It must be well-known/in lots of books, mustn't it? Said he, hopefully. Thanks for any assistance. cheers, Rolf Turner [EMAIL PROTECTED] __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
Re: [R] how to evaluate logistic model fit the data or not?
Youme, The question has been asked before, you can have a look at the R archives for that issue using: RSiteSearch(logistic goodness of fit). Last time I did this, the command found some 53 entries! Hope it helps, Augusto Augusto Sanabria. MSc, PhD. Mathematical Modeller Risk Research Group Geospatial Earth Monitoring Division Geoscience Australia (www.ga.gov.au) Cnr. Jerrabomberra Av. Hindmarsh Dr. Symonston ACT 2609 Ph. (02) 6249-9155 -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Yuezhou(Jerry) Jing Sent: Thursday, 4 May 2006 1:18 AM To: r-help@stat.math.ethz.ch Subject: [R] how to evaluate logistic model fit the data or not? Dear list, I am new here. often times, I have a question about how to evaluate logistic model fit the data or not, do you guys can help me with some guidence? thanks. Youme -- Yuezhou Jing Center for Human Growth Development University of Michigan ___ ___ 300 N. Ingalls, Rm 1064 NE [ \/ ] Ann Arbor, MI 48109-0406 | \ / | Office: (734) 615-4673 | |\ \/ /| | FAX: (734) 936-9288 | | \ / | | e-mail:[EMAIL PROTECTED] [___] \/ [___] __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
Re: [R] head function
The functions 'page()', 'head()' and 'tail()' let you look at a dataframe or array without actually opening the file. They are equivalent to 'less', 'more' and 'tail' in UNIX. Hope it helps, Augusto -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of stat stat Sent: Monday, 3 April 2006 2:37 PM To: r-help@stat.math.ethz.ch Subject: [R] head function hi all can anyone tell me what is head() function in r. what is it's utility? thanks in advance - [[alternative HTML version deleted]] __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
Re: [R] [Q] How to make a multi-line title with expression()
Young-Jin, The expression tit1 - Max. Daily Wind Speed \nSydney Airport hist(ws,xlab='Wind Speed',ylab='Freq.,main=tit1) works fine in my case. Try using your title between one set of quotes. Hope it helps, Augusto Augusto Sanabria. MSc, PhD. Mathematical Modeller Risk Research Group Geospatial Earth Monitoring Division Geoscience Australia (www.ga.gov.au) Cnr. Jerrabomberra Av. Hindmarsh Dr. Symonston ACT 2609 Ph. (02) 6249-9155 -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Sundar Dorai-Raj Sent: Wednesday, 29 March 2006 9:29 AM To: Young-Jin Lee Cc: r-help Subject: Re: [R] [Q] How to make a multi-line title with expression() Young-Jin Lee wrote: Dear R-lister Could anyone know how to make a multi-line title for a plot with expression()? In my plot, the title should be writeen in two lines (because it is two long for one line) and it should use a mathematical expression. I tried to use \n, but \n is ignored in expression() call: hist(diffChangeRequestHintsBeforeAnswering[,4], br = 50, xlab = Skill Change in Standard Deviation, main = expression(paste((a) HS, F[A], \nRequest hint(s)/subtask(s) before first attempt))) Thanks in advance. Young-Jin Lee Try RSiteSearch(multi-line expression). Thanks, --sundar __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
Re: [R] newbie question: grouping rows
Matt, Have a look at subset specially the examples at the end. I use it a lot. Hope it helps, Augusto Augusto Sanabria. MSc, PhD. Mathematical Modeller Risk Research Group Geospatial Earth Monitoring Division Geoscience Australia (www.ga.gov.au) Cnr. Jerrabomberra Av. Hindmarsh Dr. Symonston ACT 2609 Ph. (02) 6249-9155 -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Matthew Scholz Sent: Friday, 10 March 2006 9:18 AM To: r-help@stat.math.ethz.ch Subject: [R] newbie question: grouping rows Hi all, I have a very simple question that I can't seem to find the answer to. How do I extract rows that meet a certain criteria from a data frame and group them into a new data frame? For example, if I want to make a new data frame that only includes rows of data for which the p values (given by one of the columns in the data frame) are less than a certain value, how do I do this? It seems that there should be a simple function that does this. I looked into getGroups from the nmle package, but am not sure how to construct the form argument correctly or even if it's the appropriate way to tackle this. Thanks in advance of your answer, Matt __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
Re: [R] Date and Times a la Dalgaard
To manipulate date/time I use packages zoo and survival. Hope it helps, Augusto Augusto Sanabria. MSc, PhD. Mathematical Modeller Risk Research Group Geospatial Earth Monitoring Division Geoscience Australia (www.ga.gov.au) Cnr. Jerrabomberra Av. Hindmarsh Dr. Symonston ACT 2609 Ph. (02) 6249-9155 -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Farrel Buchinsky Sent: Friday, 10 March 2006 2:39 PM To: r-help@stat.math.ethz.ch Subject: [R] Date and Times a la Dalgaard Does anyone know of a resource for learning the basics of how to manage and manipulate dates and times in R? I have been reading Introductory Statistics with R by Peter Dalgaard which is fantastic. But alas, I could find no reference to date and time. I have looked at the reference manual but it is particularly unapproachable. So rather than dense technical talk I would rather see a dataset, several arguments and commentary of what is happening. The alternative to is to make Excel or Microsoft Access handle all the date and time work (I have had about 16 years experience with how to calculate and handle date and time in those programs) and then use RODBC to read it. __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
Re: [R] How do I tell it which directory to use?
Tom, You can define your working directory by using: setwd(C:\Documents and Settings\Tom\My Documents\qpaper7\R Project Started 19 Dec 05) check that your file is there: list.files() and then use: source(myFile.txt) the machine should load myFile You can go to another directory: setwd(anotherdir) and repeat the procedure. Or even better if you define a number of directories in an external file: dir1 - c(C:\Documents and Settings\Tom\My Documents\qpaper7\) dir2 - c(C:\Documents and Settings\Tom\My Documents\) and after loading the file at the beginning of the sesion you can use: setwd(dir1) etc. Is it of any help to you? Cheers, Augusto Augusto Sanabria. MSc, PhD. Mathematical Modeller Risk Research Group Geospatial Earth Monitoring Division Geoscience Australia (www.ga.gov.au) Cnr. Jerrabomberra Av. Hindmarsh Dr. Symonston ACT 2609 Ph. (02) 6249-9155 -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Thomas L Jones Sent: Wednesday, 22 February 2006 4:31 PM To: R-project help Subject: [R] How do I tell it which directory to use? From Tom: In R 2.2.0 under Windows, I want to be able to give it a filename such as myFile.txt without the quotes. But actually I mean: C:\Documents and Settings\Tom\My Documents\qpaper7\R Project Started 19 Dec 05\myFile.txt If I were to repeat this each time, my computer would get all bored and cranky and start to drop bits (only a joke, of course). I think I want to set the Home directory or the working directory or some directory or other to the above directory. I may or may not want to set some environmental variables. R 2.2.0; working directly from the console and copying and pasting code which I want to test into the console. Windows XP Home Edition. Administrator privileges are enabled. A curve ball: There are two accounts, Tom and Jones; the data are stored under Tom, whereas the computation is being done under the Jones account. I won't bore you with the details of why I am doing this. I was able to call Sys.getenv (R_USER) and get the home directory. I am a newbie to R and not familiar with the terminology. Tom Thomas L. Jones, Ph.D., Computer Science __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
[R] Gram-Charlier series
Good day everyone, I want to use the Gram-Charlier series expansion to model some data. To do that, I need functions to: 1) Calculate 'n' moments from given data 2) Transform 'n' moments to 'n' central moments, or 3) Transform 'n' moments to 'n' cumulants 4) Calculate a number of Hermite polynomials Are there R-functions to do any of the above? (mean, sd and cum3 are very limited) Thank you for your help, Augusto Augusto Sanabria. MSc, PhD. Mathematical Modeller Risk Research Group Geospatial Earth Monitoring Division Geoscience Australia (www.ga.gov.au) Cnr. Jerrabomberra Av. Hindmarsh Dr. Symonston ACT 2609 Ph. (02) 6249-9155 __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
Re: [R] 15-min mean values
Thanks a lot to Gabor for his help with the solution of this problem. The solution using zoo(aggregate) is easy to implement efficient. I have calculated the 15min mean values of a 1min wind speed file containing 2.9 million records x 16 columns (size 179 MB) in just 144 seconds (R-2.1.1 running in a GNU/LINUX machine). Thanks to Bogdan too for his suggested solution using SQL, I have not tried that one yet. Augusto __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
[R] 15-min mean values
Good day everyone, I want to use zoo(aggregate) to calculate 15-min mean values from a wind dataset which has 1-min values. The data I have looks like this: vector VDATE vector WS 1 1998-10-22:02:11 12.5 2 1998-10-22:02:12 10.1 3 1998-10-22:02:13 11.2 4 1998-10-22:02:14 10.5 5 1998-10-22:02:15 11.5 . . . n 2005-06-30:23:59 9.1 I want to use: aggregate(zoo(WS),'in 15-min intervals',mean) How do you specify 'in 15-min intervals' using vector VDATE? The length of VDATE cannot be changed, otherwise it would be a trivial problem because I can generate a 15-min spaced vector using 'seq'. Am I missing something? Thanks a lot, Augusto Augusto Sanabria. MSc, PhD. Mathematical Modeller Risk Research Group Geospatial Earth Monitoring Division Geoscience Australia (www.ga.gov.au) Cnr. Jerrabomberra Av. Hindmarsh Dr. Symonston ACT 2609 Ph. (02) 6249-9155 __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
[R] Calculation of daily max
Thank you Gabor, the 'aggregate' function operating on zoo(WS) does the job beautifully! 'zoo' has a lot of other goodies too, great package (thanks for that too). Cheers, Augusto Augusto Sanabria. MSc, PhD. Mathematical Modeller Risk Research Group Geospatial Earth Monitoring Division Geoscience Australia (www.ga.gov.au) Cnr. Jerrabomberra Av. Hindmarsh Dr. Symonston ACT 2609 Ph. (02) 6249-9155 -Original Message- From: Gabor Grothendieck [mailto:[EMAIL PROTECTED] Sent: Tuesday, 17 January 2006 4:32 PM To: Sanabria Augusto Cc: r-help@stat.math.ethz.ch Subject: Re: [R] Calculation of daily max Assuming VDATE is a character vector this produces a zoo time series object. library(zoo) z - aggregate(zoo(WS), as.Date(VDATE), max) coredata(z) and time(z) are the data vector of maximums and corresponding times, respectively. The R command: vignette(zoo) gives an introduction to zoo. Aside from zoo you could check out ?tapply, ?by and ?aggregate . On 1/16/06, [EMAIL PROTECTED] [EMAIL PROTECTED] wrote: Good day everyone. I have a large dataset of 1 min wind speeds covering 5 years. How can I make an array of maximum daily values? The vectors I have are: 'VDATE' with dates in format '%Y-%m-%d' (like '1992-10-28') and 'WS' with wind speed data (same number of elements as VDATE). I want an array with 2 columns: Max daily wind speed and corresponding day. Has anyone got an elegant way of doing that? (My background is in C++ I would tend to use loops but that is not very elegant in R, isn't it?) Augusto __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
[R] Calculation of daily max
Good day everyone. I have a large dataset of 1 min wind speeds covering 5 years. How can I make an array of maximum daily values? The vectors I have are: 'VDATE' with dates in format '%Y-%m-%d' (like '1992-10-28') and 'WS' with wind speed data (same number of elements as VDATE). I want an array with 2 columns: Max daily wind speed and corresponding day. Has anyone got an elegant way of doing that? (My background is in C++ I would tend to use loops but that is not very elegant in R, isn't it?) Augusto Augusto Sanabria. MSc, PhD. Mathematical Modeller Risk Research Group Geospatial Earth Monitoring Division Geoscience Australia (www.ga.gov.au) Cnr. Jerrabomberra Av. Hindmarsh Dr. Symonston ACT 2609 Ph. (02) 6249-9155 __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
