similar to: A problem with anova()

  Hi, I fitted tree growth data with Chapman-Richards growth function using nls. summary(fit.nls) Formula: Parameters: Estimate Std. Error t value Pr Signif. codes: 0 ''***'' 0.001 ''**'' 0.01 ''*'' 0.05 ''.'' 0.1 '' '' 1 Residual standard error: 1.879 on 713 degrees of freedom Algorithm

R Help - I'm trying to run a correlation matrix with a covariate of "age" and will at some point will also want to covary other variables concurrently. I'm using the "psych" package and have tried other methods such as writing a loop to extract semi-partial correlations, but it does not seem to be working. How can I accomplish this? library(psych) > set.cor(y =

I have been tasked with installing statistical and other data analysis applications on a new Sun Fire X4600 M2 x64 server that came equipped with eight AMD dual core Opteronn 64-bit processors. It is running the 64-bit version of Suse Linux 9. I have read through the installation docs, and I guess I don't understand what to do, or even how to identify which version, if any, of this

To anyone who can help: I have two brief questions concerning sapply. Following below is the code for my example. The two problems are described at the end of the code: site <- rep(2:6, each = 12) tillage <- rep(c(1,-1), each = 6, times = 5) carbon <- c(18.23, 16.06, 17.81, 16.07, 17.26, 17.08, 14.92, 15.88, 12.11, 14.23, 16.99, 13.57, 20.34, 20.3,

Hello, I am doing simulations, and I generate a list at each iteration (with three component matrices in the example below), saving the results in a list. For example, after two iterations, I have something like > str(sim.theta) List of 2 $ :List of 3 ..$ : num [1:6, 1:4] -3.67 -1.07 -2.99 -18.38 -3.26 ... ..$ : num [1:6, 1:6] -7.56 -3.14 -4.99 1.03 2.79 ... ..$ : num [1:6, 1:4]

R Version 1.7.0 Patched (2003-04-28), built on Solaris 2.8 with gcc 3.0.3. Obtained via rsync -rC rsync.r-project.org::r-patched R I'm not sure how signficant these difference are during development, but after an apparently successful build I got the following discrepancies in make check: make[3]: Entering directory `/export/home/ross/src/R/tests' running code in 'reg-tests-1.R'

Dear list, I'm trying to fit a chapman-richards equation to my data, only I cannot interpret the parameters a, b and d. I know that the parameter b denotes the asymptote, but for the others I couldn't figure out. But I do need to know this in order to set my starting values. Here's the model: modPoplar<- nls(Diameter ~ d*(1-exp(-b *Age))^a ,start=list(a=20,b=0.9,d=33)) I attached

Hi folks, We recently generated some data that seemed interesting enough to share here. This is a comparison between compilers that ignores the performance of the generated code and focuses only on compiler correctness. volatile checksum errors errors avr-gcc-3.4 1.879% 0.378% avr-gcc-4.1 0.037% 0.256% avr-gcc-4.2

Dear list, I'm trying to fit a chapman-richards equation to my data, only I cannot interpret the parameters a, b and d. I know that the parameter b denotes the asymptote, but for the others I couldn't figure out. But I do need to know this in order to set my starting values. Here's the model: modPoplar<- nls(Diameter ~ d*(1-exp(-b *Age))^a ,start=list(a=20,b=0.9,d=33)) I attached

Has anybody done any authentication to Lotus Domino using LDAP? I selected LDAP options in the "authconfig-tui" application, per the documentation here: http://www.centos.org/docs/5/html/Deployment_Guide-en-US/s1-ldap-pam.html when I try to query the directory for user information though, I get no results using the ldapsearch command [root at ldapclient ~]# ldapsearch -x

Hi, Attached is my patch to add theora encoding to ffmpeg's libavcodec (by using libtheora). I am requesting help to fix the bug I mention below and am seeking general comments before I submit the patch properly. Files encoded using this encoder have a problem playing in VLC. The files will not play unless "Drop late frames" has been unticked in the advanced video settings.

Dear R helpers, I am not a statistician and right now struggling with Richards curve. Wikipedia says (http://en.wikipedia.org/wiki/Generalised_logistic_function) The "generalized logistic curve or function", also known as Richard's curve is a widely-used and flexible sigmoid function for growth modelling, extending the well-known logistic curve. Now I am confused and will like to

(Cross posted to theora-dev@xiph.org and ffmpeg-devel@mplayerhq.hu) I am working towards adding Theora encoding support to libavcodec in FFmpeg. I am doing this by simply calling libtheora from libavcodec. I am at the point where I can execute: "./ffmpeg -v 100 -i test.wmv -f avi -an -vcodec theora -b 1000000 -y test.avi" I get some whirring and an output file written. My calls to

Tim Northover <t.p.northover at gmail.com> writes: >> /tmp/foo.s:1:2: error: instruction requires: distinct-ops >> sllk %r2,%r3,1 >> ^ > > That seems like it would be a good improvement for all targets. Thanks, sounds like it might be more acceptable than I thought :-) >> ARM seems to rely on the current MatchOperandParserImpl() behaviour,

Hi, I am letting myself known incase someone is interested in this or already has ideas on the subject. I would like to add Theora encoding to ffmpeg's libavcodec library. My goal is to add vorbis / theora / ogm output to Handbrake. Doing this at the libavcodec level appears to make the most sense as it would benefit more people. I have already made a small start. I have the configure

Hello: Can you tell me if there's a simple way to generate in R random vectors on the unit sphere in R^{n}? Additionally, are there references for this question? Thanks in advance. Tom -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html Send "info", "help", or

Can survreg() handle interval-censored data like the documentation says? I ask because the command: survreg(Surv(start, stop, event) ~ 1, data = heart) fails with the error message Invalid survival type yet the documentation for Surv() states: "Presently, the only methods allowing interval censored data are the parametric models computed by 'survreg'"

It seems as though it cannot be done. Does anyone know how to do it? Thanks Chris -- Posted via http://www.ruby-forum.com/.

> /tmp/foo.s:1:2: error: instruction requires: distinct-ops > sllk %r2,%r3,1 > ^ That seems like it would be a good improvement for all targets. > ARM seems to rely on the current MatchOperandParserImpl() behaviour, > so I'm not going to suggest changing it unconditionally. Presumably you switched it and looked at what fell over; do you remember what kind

Hello: I have been using sm.binomial() in the Bowman and Azzalini's sm package to smooth and plot estimated probabilities as a function of a covariate. I am concerned about my choice of bandwidth, and I was hoping there was another method available in some other package, perhaps with an automatic choice of smoothing parameter. Does anyone know of one? Thanks in advance. Tom Richards