similar to: Recommended textbooks for R?

Displaying 20 results from an estimated 4000 matches similar to: "Recommended textbooks for R?"

2008 Jan 02
2
Multivariate response methods question
Hi Everyone, I have some data that predicts both a nominal and ordinal response variable. I was wondering what packages in R would help me analyze the data? I was also curious if anyone could recomend me some textbooks that would help with the analysis of such data? I have the 5th edition of "Applied Multivariate Statistical Analysis" by Richard A. Johnson and Dean W. Wichern
2009 Sep 03
2
dividing a dataframe column by different constants
Dear R users, today I've got the following problem. Here you are a dataframe as example. There are some SAMPLES for which a CONCentration was recorded through TIME. The time during which the concentration was recorded is not always the same, 10 points for Sample A, 7 points for Sample B and 11 for sample C Also the initial concentration was not the same for the three samples. I would like
2008 May 06
4
Is there in R a function equivalent to the mround, as found in most spreadsheets?
Dear R-users, I have the following problem In a lab experiment I have to mix three solutions to get different concentrations of various molecules in a cuvette I've used R to calculate the necessary ?liters for each of the level of the experiment and I must confess that it is more useful and easier to achieve the results than using spreadsheets. But there's a problem. Imagine that
2009 Nov 12
1
Rearranging long tables, Sweave, xtable, LaTeX
Dear R-users, consider the two following outputs, ## 1 and ## 2 \begin{Scode}{Setup, echo = FALSE, print = FALSE, eval = TRUE} with(expand.grid(Fact1 = 1:3, Fact2 = 1:40), table(Fact1, Fact2)) ## 1 xtable(with(expand.grid(Fact1 = 1:3, Fact2 = 1:40), table(Fact1, Fact2))) ## 2 \end{Scode} The first line with(expand.grid(Fact1 = 1:3, Fact2 = 1:40), table(Fact1, Fact2))
2007 Dec 03
1
again on ubuntu 7.10 and amd64
Hi there, this is my first post to the list. I'm a newcomer to the linux world. I started using it on a regular basis on May and I must say I'm quite comfortable with it, even if I have to re-learn a lot of things. But this is not a problem, I will improve my knowledge with time. My main problem now is that I bought myself a new computer (described at the end of this e-mail) and I was
2009 Aug 13
1
R code to reproduce (while studying) Bates & Watts 1988
Hi R users, I'm here trying to understand correlated residuals in nonlinear estimation. I'm reading/studying the book Bates, D. M. and D. G. Watts, (1988), /Nonlinear regression analysis and its applications/, Wiley, NY. pages 92-94, trying to reproduce the figures and to find out the code in R to perform the necessary calculations. I also consulted Pinheiro and Bates, but without
2009 Aug 17
4
Rounding to the nearest 5
Dear all, A hopefully simple question: how do I round a series of values (held in an object) to the nearest 5? I've checked out trunc, round, floor and ceiling, but these appear to be more tailored towards rounding decimal places. Thanks, Steve _________________________________________________________________ icons.
2007 Oct 22
2
having problems with the lme function
Dear R-users: I have some problems working with lme function, and i would be glad if anyone could help me. this kind of analysis i was used to do with PROC MIXED from SAS, but i would like to move to R, for many reasons... So, the problem is: Imagine the I have 3 factors: fact_A, fact_B and fact_C: The latter I would assume that is random, and the rest of them are fixed. Analysing the
2007 Jul 26
3
substituting dots in the names of the columns (sub, gsub, regexpr)
Dear R users, I have the following two problems, related to the function sub, grep, regexpr and similia. The header of the file(s) I have to import is like this. c("y (m)", "BD (g/cm3)", "PR (Mpa)", "Ks (m/s)", "SP g./g.", "P (m3/m3)", "theta1 (g/g)", "theta2 (g/g)", "AWC (g/g)") To get rid of spaces and
2007 Dec 05
5
Which Linux OS on Athlon amd64, to comfortably run R?
Dear R-users. I eventually bought myself a new computer with the following characteristics: Processor AMD ATHLON 64 DUAL CORE 4000+ (socket AM2) Mother board ASR SK-AM2 2 Ram Corsair Value 1 GB DDR2 800 Mhz Hard Disk WESTERN DIGITAL 160 GB SATA2 8MB I'm a newcomer to the Linux world. I started using it (Ubuntu 7.10 at work and FC4 on laptop) on a regular basis on May. I must say I'm
2007 Dec 05
5
Which Linux OS on Athlon amd64, to comfortably run R?
Dear R-users. I eventually bought myself a new computer with the following characteristics: Processor AMD ATHLON 64 DUAL CORE 4000+ (socket AM2) Mother board ASR SK-AM2 2 Ram Corsair Value 1 GB DDR2 800 Mhz Hard Disk WESTERN DIGITAL 160 GB SATA2 8MB I'm a newcomer to the Linux world. I started using it (Ubuntu 7.10 at work and FC4 on laptop) on a regular basis on May. I must say I'm
2004 Mar 29
2
Problems with "optimize"
Dear All, I'm trying to maximize a likelihood with respect one parameter using "optimize" on simulated data (without error component). I've iterated the maximization procedure 1000 times and I should always obtain the same estimate of the parameter (equal to the simulated one) but, instead, i obtain different results (the likelihood function shouldn't be flat). Does
2003 Aug 24
1
problems in updating cvsroot under cygwin
Hi I've always updated and committed my cvsroot directory using rsync also under windows with rsync distributed with cygwin. After installed the new release of cywing with rsync 2.5.6 protocol version 26, updating my cvsroot does not work anymore (under windows): it locks with receiving file list ... I use this command to update: rsync -e ssh -avzu --delete -c -C --include=CVS
2008 Dec 27
1
contour plot - smooth lines
Dear R-Users, I am using 'contour' to plot a graph using values x,y and a matrix z. I would like to obtain 'smooth lines' instead of no-smooth contour lines. I tried with filled.contour too. In a Post I found yy <-predict(interpSpline(x, y)) I could use that method for each range that I want to plot but I hope to find a easier method. Thank you Tommaso Letterio DIAF - UniFi
2008 Jul 31
5
Random number generation
Hi Everyone, I did a quick search of the list and it looks like this may not have been asked before... I'm trying to generate a matrix of random numbers between 0 and 1, with 6 columns, 10000 rows. About all I know is that runif(1) gives me the random number I'm looking for. Any help would be great! thanks, -Max
2008 Jul 31
5
Random number generation
Hi Everyone, I did a quick search of the list and it looks like this may not have been asked before... I'm trying to generate a matrix of random numbers between 0 and 1, with 6 columns, 10000 rows. About all I know is that runif(1) gives me the random number I'm looking for. Any help would be great! thanks, -Max
2004 Aug 29
2
restarting a server
A question, althought it is not strictly samba pertinent: I have some Win2k server that offers dial-in to local users. Today all stopped working, but the ones using linux ... However these are not sufficient, so i ask here [since it is probable many people have win2k hosts around) - how to , logging in the win2k server with ssh, restart RAS ? Of couse i can use only CLI programs ... at woest ...
2003 Jan 04
4
filelist calculation algoritm
HI all, efficiency question for VERY low bandwith networks Suppose I know the list of files that are changed What is the most efficient way to make rsync sync this list. Currently I use --include-from --exclude to generate a 'filelist' but I suspect that client and/or server exchange the list of files in the module to be synced. this traffic can be avoided since the include-from
2003 Aug 10
1
Possible samba options:
I plan to use samba to substitute two NT4 server (PDC/BDC) howewer I am not sure if it would fit: I have not been able to find either in the samba 3.0 and samba-tng documentation the following informations: 1. Can I have three different serever on which putting the home directories of the users (of course this would be set in their profiles) ? logon_home parameter seem to forbide this ... 2.
2002 Nov 06
4
offline rsync
hello, I'm new to this list. here is my question: I would like to synchronize two computers (say the home one and the job one) using zip drives or similar (cdroms, etc), since modem lines are quite slow and expensive (in Italy). I though I could produce the "signature" of files on home computer, store it on a zip, go to job, run rsync to copy the missing or altered files on