similar to: A beginner's question

I am a new R user. Now I have some problem while I use R. I have set up a data frame called "mydata". One of the colume of it was "skill". Now I want to select the observations of the frame whose "skill" value is 1,by what command can I get it?

Hi I need advice regarding constraint optimization with large number of variables. I need to solve the following problem max f(x1,...,xn) x1,..xn x1=g1(x1,...,xn) . . xn=gn(x1,...,xn) I am using Rdonlp2 package which works well until 40 variables in my case. I need to solve this problem with over 300 variables. In this case Rdonlp2 is very very slowly. I know

Hello, How I can compute in R the orthogonal complement of one matrix? If A (n x m ) matrix of full column rank (n>m), its orthogonal complement is denoted by A_ . A_ is n X (n-m) matrix of full column rank and such that A'A_=0. I need to compute A_. How I can compute A_ in R? Best Regards, /Florin -- Florin G. Maican Ph.D. candidate, Department of Economics School of

I want to forecaste the call number everyday for a call-center. Now I have removed the influence of the fluctuation with some method, so only thing left is to analyze the trend of the call number every day. I have thought of two ways: regression and HoltWinters smooth. But when I use regression, I find some day's call number will bcome negative, which is obviously unreasonabe. If I use

I want to use double-exponential smoothing to forecast time series datas,but I couldn't find it in the document,does R support this method?

Suppose I have two var x and y,now I want to fits a natural cubic spline in x to y,at the same time create new var containing the smoothed values of y. How can I get it?

I am used to using the [R] function choose.files() for interactive file selection in MS-Windows. What is the comparable function in Linux? I expected the function file.choose() to display similar behavior, i.e., a graphical interface diplaying a file listing, but all I seem to get is a "text input prompt". This does not seem correct. > file.choose() Enter file

To all moderators i guess, my question was probably not clear this is not a homework, i am trying to understand R by doing some exercise in my book. I will however participate a course in R in august and thought it could be good to have some knowledge before. I hoped for help from you since i have no instructor to ask, that would have been my first choice. thanks anyway Lotta

Windows-32 has a time structure called FILETIME, a 64-bit value representing the number of 100-nanosecond intervals since January 1, 1601 (UTC). That is not a typo, the year is 1601. Does anyone have a clue(or algorhithm)for how this is converted to something a little more POSIX-like ? Thank you, Derek -- Derek N. Eder Gothenburg University VINKLA - Vigilance and Neurocognition

Dear all, does anyone know if there exists an effort to bring some kind of distributed computing to R? The most simple functionality I'm after is to be able to explicitly perform a task on a computing server. Sorry if this is a non-informed newbie question... Best regards Anders Sj?gren PhD Student Dept. of Mathematical Statistics Chalmers University of Technology Gothenburg, Sweden

1. Emma is performing an experiment that requires individual handling of some animals. The sizes of the animals are lognormally distributed: The natural logarithms of their sizes has a normal distribution with mean 3 and standard deviation 0.4. The time (in minutes) it takes to handle each animal is given by 10 + s · 1.5 + eε for animals with s ≤ 20 20 + s · 0.8 + eε for animals with s > 20

Hi, Has something changed regarding the useDynLib in the NAMESPACE file in packages? I've written a package that works in e.g. 2.12/2.13 but simply cannot find the dynamic library under windows. The version on CRAN is older than the one I'm talking about and depends on a newer version of R but I want to make the package available to people with older versions. >

I have successfully installed Samba 2.2.7a as a PDC and has added the "add user script" to automatically create machine accounts. This worked very well when I added my client machine the first time. It successfully joined the domain and I was able to login as a user. I then removed the machine from the domain and put it in an unrelated workgroup and then tried to re-join the Samba

After a frightening experience with W2K Active Directory, we've been considering an "emergency migration" to Samba. I've been looking at both 2.2.7 and the latest 3.0 alpha, but have found little information about migrating from W2K. Most information seems to be about Windows NT PDC. What I've tried is to pull the information from the AD tree with pwdump3 and put it in the

I want to migrate my R workspace databases (e.g., .Rdata) from Windows to Linux. The R help file for "save" says that "[a]ll R platforms use the XDR representation of binary objects in binary save-d files, and these are portable across all R platforms." Is it is simple as that? Copy the Windows .Rdata file to the Linux .ext3 file system? Thanks, Derek Derek N. Eder

sorry for cross-posting Dear all, I have tow (several) bivariate distributions with a known mean and variance-covariance structure (hence a known density function) that I would like to compare in order to get an intersect that tells me something about "how different" these distributions are (as t-statistics for univariate distributions). In order to visualize what I mean hear a little

I've searched through the mailing lists and seen a few similar problems, but those fixes didn't fix me. Error: I can join the domain, but after rebooting and attempting to log in I get the error: The system cannot log you on to this domain because the system's compuer account in its primary domain is missing or the password on that account is incorrect. Steps to obtain the

Dear all, I am including a part of the text from smb.log. I have followed the instructions in "Using Samba" but to no avail. I have checked through the troubleshooting chapter which directed me to the logs initially, but has nothing specific to say about bad news contained therein. The output of the log makes it clear that the problem is related to the smp_passwd file but I am not

Readers of this mailing list may be interested to know that the book "A Beginner's Guide to Generalized Additive Models with R' is now available from: http://www.highstat.com/BGGAM.htm Upcoming books in 2013: A Beginner's Guide to GLM with R and JAGS. AF Zuur, J Hilbe, EN Ieno A Beginner's Guide to GAMM with R. AF Zuur, AA Saveliev, EN Ieno Kind regards, Alain Zuur

Thomas, may I also suggest, from the Documentation>Contributed section of CRAN, "Econometrics in R" by Grant Farnsworth http://cran.at.r-project.org/doc/contrib/Farnsworth-EconometricsInR.pdf (see the chapter on Time series) and, in case you can read Italian, "Analisi delle serie storiche con R" by Vito Ricci http://cran.at.r-project.org/doc/contrib/Ricci-ts-italian.pdf