search for: ritz

...se respond if you have any suggestions. There are some previous postings about constraining the coefficients, but this won't accomplish what I am trying to do. The coefficients can be negative, just as long as the predicted values are positive. Thank you in advance for your time. Westley A. Ritz Analyst 215-641-2243 writz at trchome.com TRC www.trchome.com

...udience I can reach, I expect the majority of the attendees to be involved with Ruby on Rails, although it isn''t a technology-specific conference. Information and registration now available at http://www.bizconf.org/ -- Additional Information -- BizConf is on Thursday and Friday and the Ritz-Carlton is offering steep discounts on their room rates for up to 3 days before and after the conference, making it s a perfect opportunity to turn your trip into a vacation getaway with friends and family. I selected the venue particularly because of the luxurious rooms, restaurants and spa, not t...

...39; The following object(s) are masked from package:plotrix : plotCI The following object(s) are masked from package:stats : lowess 'qpcR' has been loaded. Please cite R and the following if used for a publication: Spiess AN, Feig C, Ritz Highly accurate sigmoidal fitting of real-time PCR data by introducing a parameter for asymmetry. BMC Bioinformatics 2008, 29:221 or Ritz C, Spiess AN. qpcR: an R package for sigmoidal model selection in quantitative real-time polymerase chain reaction analysis. Bioinformatics 2008, 2...

...posted a question (bellow) a few weeks ago and had a reply (thanks Christian) that partly solves the problem, but I still would like to be able to restrict some of the independent variables in a nls model to be always >0, (is there a way to do it)?? Thanks, Angel >From: "Christian Ritz" <ritz at dina.kvl.dk> >To: "Angel -" <angel_lul at hotmail.com> >CC: <r-help at stat.math.ethz.ch> >Subject: Re: [R] nls: Missing value or an Infinity produced when evaluating >the model >Date: Wed, 23 Apr 2003 15:22:37 +0200 > >Hi Angel, >...

...sh (+). also attached is small patch which fixes the problem. it makes sure that the terminal info passed to tty_make_modes() is valid and not all zero. it should not change behaviour in any other case. comments? rgds -daniel -------------------------------------------------------------- Daniel Ritz Software Engineer Alcatel Schweiz AG OP-CCBS-OSS Friesenbergstrasse 75, CH-8055 Z?rich email daniel.ritz at alcatel.ch web http://www.alcatel.ch --------------------------------------------------------------

...ullname in the console and it will return last_name, first_name. However, I would like to_xml to do this also. This is basically the concept of a computed column. I tried adding to the column hash in Person and many other ideas but nothing works. Can anyone help with this? Thanks very much. Ritz -- Posted via http://www.ruby-forum.com/.

I am looking into fitting a so-called double von Bertalanffy function to fish length-at-age data. Attempting to simplify the situation, the model looks like this ... Y ~ f(X; a,b,c) if x < Z Y ~ g(X; a,d,e) if x >= Z where * f and g are non-linear functions (the "traditional" "single" von Bertalanffy growth function), * Y (length) and X (age) are observed variables,

...rsion: -current Platform: All OS/Version: All Status: NEW Severity: normal Priority: P2 Component: ssh AssignedTo: bitbucket at mindrot.org ReportedBy: djm at mindrot.org OtherBugsDependingO 1155 nThis: Daniel Ritz <daniel.ritz AT alcatel.ch> reports: ssh client sends a wrong all-zero terminal info when requesting forced pseudo-terminal allocation while stdin is not a terminal. sshd then sets the terminals ospeed to 0 because it receives this information from the client. on solaris this means that the...

Hi, the following R lines work fine in R 2.4.0 alpha (and older R versions), but not in R 2.4.0 beta (details below): library(drc) # to load the dataset 'PestSci' library(nlme) ## Starting values sv <- c(0.328919, 1.956121, 0.097547, 1.642436, 0.208924) ## No error m1 <- nlme(SLOPE ~ c + (d-c)/(1+exp(b*(log(DOSE)-log(e)))), fixed =

Following an example on p 111 in 'Nonlinear Regression with R' by Ritz & Streibig, I have been fitting nls models using square brackets with the grouping variable inside. In their book is this example, in which 'state' is a factor indicating whether a treatment has been used or not: > Puromycin.m1 <- nls(rate ~ Vm[state] * + conc/(K[state] + con...

http://bugs.freedesktop.org/show_bug.cgi?id=16148 Summary: primary display is borked with RandR12 enabled Product: xorg Version: unspecified Platform: Other OS/Version: All Status: NEW Severity: normal Priority: medium Component: Driver/nouveau AssignedTo: nouveau at lists.freedesktop.org

> Date: Friday, August 28, 2015 16:47:43 +0000 > From: Tony Mountifield <tony at softins.co.uk> > > In article > <CAOZy0enqddiPvpd+M-Ltwih9dPmA7b_ro4-_5bQ=u1GAALDebA at mail.gmail.co > m>, Tim Dunphy <bluethundr at gmail.com> wrote: >> Hey guys, >> >> Sorry for the failed attempts at obscuring the company I work >> for. My boss

Hello, I'm a beginner with R and it's the first time I'm using the R-help list... I hope I'm in the right place, if not: Sorry!! I need to do non linear regressions on a data set which columns are: "river.name" "Portata" "PTG.P" "PO4.P" "NT.N" "NH4.N" "NO3.N" "BOD5" "SiO2"

...it? This is a brand spanking new 4.4 system and a supported Agere chipset firewire card. I'm having trouble tickling devices connected to the card. In particular, I'm trying to mount a firewire external DVD device. Lspsi shows the following so I *thought* the kernel found the card: [ritz at localhost ~]$ /sbin/lspci 00:06.0 PCI bridge: Advanced Micro Devices [AMD] AMD-8111 PCI (rev 07) 00:07.0 ISA bridge: Advanced Micro Devices [AMD] AMD-8111 LPC (rev 05) 00:07.1 IDE interface: Advanced Micro Devices [AMD] AMD-8111 IDE (rev 03) 00:07.2 SMBus: Advanced Micro Devices [AMD] AMD-8111 S...

In article <0F55E883640C125375C75506 at ritz.innovate.net>, Richard <lists-centos at listmail.innovate.net> wrote: > > Also need to see the error_log entries from the back-end httpd > server that's serving from the documentroot. The proxy server's logs > (whether it should be there or not) only show the proxy iss...

...s from http://www.jstatsoft.org Firth Bradley-Terry Models in R Volume 12, Issue 01 Sturtz, Ligges, and Gelman R2WinBUGS: A Package for Running WinBUGS from R Volume 12, Issue 03 Mineo and Ruggieri A Software Tool for the Exponential Power Distribution: The normalp Package Volume 12, Issue 04 Ritz and Streibig Bioassay Analysis Using R Volume 12, Issue 05 Baddeley and Turner spatstat: An R Package for Analyzing Spatial Point Patterns Volume 12, Issue 06 Johnstone and Silverman EbayesThresh: R Programs for Empirical Bayes Thresholding Volume 12, Issue 08 Nason pinktoe: Semi-automatic Trave...

...s from http://www.jstatsoft.org Firth Bradley-Terry Models in R Volume 12, Issue 01 Sturtz, Ligges, and Gelman R2WinBUGS: A Package for Running WinBUGS from R Volume 12, Issue 03 Mineo and Ruggieri A Software Tool for the Exponential Power Distribution: The normalp Package Volume 12, Issue 04 Ritz and Streibig Bioassay Analysis Using R Volume 12, Issue 05 Baddeley and Turner spatstat: An R Package for Analyzing Spatial Point Patterns Volume 12, Issue 06 Johnstone and Silverman EbayesThresh: R Programs for Empirical Bayes Thresholding Volume 12, Issue 08 Nason pinktoe: Semi-automatic Trave...

Dear list members, is it intentional that: curve(cos, xlim = c(-5, 5)) plot(cos, xlim = c(-5, 5)) produce different plots? Shouldn't the 'xlim' argument in both cases set the 'from' and 'to' argument if they aren't supplied (at least that's what I understood reading the help page for 'curve' and 'plot.function')? Christian >

...lied to an object of class "arma" How do I get around this? I cannot use arima() because I need the flexibility of "lag" from arma(), unless there's a way to include lag in arima(). I have attached the .dat data file. Would appreciate any guidance/help. Thanks! Cheers, -Ritz http://r.789695.n4.nabble.com/file/n3898622/spdata.dat spdata.dat -- View this message in context: http://r.789695.n4.nabble.com/ARMA-and-prediction-tp3898622p3898622.html Sent from the R help mailing list archive at Nabble.com.

...:30, 10:30,10:15, 3:12, hence non equidistant) My question is, do I need to worry about the data being non equidistant? If so, how do I modify my series to account for it? Or is it safe to assume data as being equidistant,as it may not have a strong influence on the final forecast? Thanks! -Ritz -- View this message in context: http://r.789695.n4.nabble.com/Equidistant-time-spacing-of-time-series-data-tp3960790p3960790.html Sent from the R help mailing list archive at Nabble.com.