search for: physicist

Dear R-help, I am interested in using structural equation modeling. Just getting started with it, but I'm looking for suggestions for packages. As an aside, what's the best way for looking for packages at CRAN? -- Robert Terwilliger Biomedical Physicist Laboratory of Neurocognitive Development Western Psychiatric Institute and Clinic University of Pittsburgh Medical Center Loeffler Building 121 Meyran Avenue #114 Pittsburgh, PA 15213 412.383.8174 - Office 412.383.8179 - Fax em: raterwil at gmail.com http://www.wpic.pitt.edu/research/lncd/

If _you_ were asked to give a 40 minute dog and pony show about R for a group of scientists ranging from physicists to geographers what would you put in? These people want to know what R can do. I'm thinking about something like: A. Overview B. data structures C. arithmetic and manipulation D. reading data E. linear models using glm F. graphics G. programming H. other tricks like rpart or time series anal...

On Sun, Jul 16, 2017 at 06:02:15PM +0100, Pete Biggs wrote: > > > > The physicists and mathematicians who count there need high durations. > > Yes. I too run HPC clusters and I have had uptimes of over 1000 days - > clusters that are turned on when they are delivered and turned off when > they are obsolete. It is crucial for long running calculations that you > h...

...stribution of result for each value of var. In this plot, each boxplot is labeled by the corresponding value of var, but the absissas are evenly spaced. Is it possible to generate a boxplot with the absissas of each boxplot equal to the corresponding value of var? -- Alan Barnett, PhD Imaging Physicist National Institutes of Health NIMH/CBDB 301 402 3507

...eom_hline I get the plots I would expect. It doesn't seem to make any difference if I get the mean and difference separately. Can anyone explain this and tell me how to avoid it (and why does it work with the Diamonds data set? Any help much appreciated - thanks. Sandy Sandy Small Clinical Physicist NHS Forth Valley and NHS Greater Glasgow and Clyde ******************************************************************************************************************** This message may contain confidential information. If yo...{{dropped:21}}

...10,11,11,11,11,12,12,12,13,13,14,15,15,16,16,16,17,17,17,17,18,18,18,18,18) d2<-c(rep("a",25), rep("b",39)) dafr<-data.frame(d1,d2) library(ggplot) qplot(d1, data=dafr, fill=d2, geom='histogram', binwidth = 1) Many thanks for any help Sandy Sandy Small Clinical Physicist NHS Forth Valley and NHS Greater Glasgow and Clyde ******************************************************************************************************************** This message may contain confidential information. If yo...{{dropped:24}}

I've just discovered R and think it is terrific. I quickly reproduced results with a few lines of R commands that 7 years ago I had to do with a larger fortran code and many calls to NAG routines. (I'm mostly a computational plasma physicist, but occasionally delve into statistical analysis of data.) But I've come accross a very peculiar behavior of attached objects that cost me hours of searching for a bug, and it would be nice if the R developers could implement a small change to make the language easier to use. The problem was...

Can anyone help me on how to get the nodes and weights of the adaptive quadrature using R. Best wishes Boikanyo. ----- The University of Glasgow, charity number SC004401

...always reinstall a node (tftp / http) - To relieve the internal network printing, I create rpm packages that are installed on the nodes. All this happened about 3 years ago. Centos 1511 was established as a stable variant for the environment. It was one of my many different tasks in my work. The physicists and mathematicians who count there need high durations. My decision much on Centos because: - free - Maintaining until the year 2024, longer than the cluster will live. My way in the beginning was hard, because I had to learn everything from the scratch and I'm no longer the youngest, bu...

...tput of the model on the original data to compare how well it captures the variations in the data? i know that predict can be used to extrapolate beyond the end of the data series, but i want to evaluate the model within (not beyond) the original data. best regards, andrew. -- Andrew B. Collier Physicist Waves and Space Plasmas Group Hermanus Magnetic Observatory Honorary Senior Lecturer tel: +27 31 2601157 Space Physics Research Institute fax: +27 31 2607795 University of KwaZulu-Natal, Durban, South Africa gsm: +27 83 3813655

...away so that there is an empty "margin" around the circles. is there a way to get rid of this margin? my first guess was that there would be an option to par() but i did not find anything there. any suggestions would be appreciated. thanks! best regards, andrew. -- Andrew B. Collier Physicist Waves and Space Plasmas Group Hermanus Magnetic Observatory Honorary Senior Lecturer tel: +27 31 2601157 Space Physics Research Institute fax: +27 31 2607795 University of KwaZulu-Natal, Durban, South Africa gsm: +27 83 3813655

.../libatlas* /usr/lib/libatlas.so.3gf@ [ 42 ] <wow> (ron) ls /usr/lib/libf77blas* /usr/lib/libf77blas.so.3gf@ -------- so these are there and linked OK and there is no Rlapack. I am at a loss as to where to go from here. Thank you all for your consideration. Ron Burns -- R. R. Burns Physicist (Retired) Oceanside, CA

...in the middle of my R source code, plus the relatively slow compilation of latex makes it quite impractical for quick studies ( I once spent 20 minutes trying to get the graph to be at a sensible scale on the page). As an alternative, I'm resorting to having a folder per study (I'm physicist, doing data analysis for optical spectroscopy), with one R file per analysis and a text file to keep track of the experimental conditions. When the data is really important / interesting, I've also tried to write a package: great for storing the data, functions and commands in a consist...

I''m a physicist working on fusion energy and dabble in statistics only occasionally, so please excuse gaps in my statistical knowledge. I''d appreciate any help that a real statistics expert could provide. Most people in my field do only very simple statistics, and I am trying to extend some work on mult...

...resents buggy behavior. It is even less clear now to me how to properly set up the time trends for an arima fit? Does arma expect the results from time() without an offset, or what I think it should be? Thanks in advance for your consideration and help. Best regards, Ron -- R. R. Burns Physicist (Retired) Oceanside, CA

...inner when it comes to R and this project will be finished before I could learn everything I'd need for a pure R solution. I'm familiar with perl, however, so I'd like to stick to that. Thanks for your answers in advance and please excuse me if this causes too much noise: P?ter Juh?sz physicist

...ks look OK. Should I be linking to static libs and if so they do not seem to on my machine anywhere. ( a "find . -name "*f77blas*" (or on atlas) turned up so's only) I am at a loss as to where to go from here. Thank you all for your consideration. Ron Burns -- R. R. Burns Physicist (Retired) Oceanside, CA

...if (args.ball.color == "red") this.doTheBounceStuff(args.ball, args.howHigh * 2); else this.doTheBounceStuff(args.ball, args.howHigh); }, doTheBounceStuff: function(ball, howHigh) { ...push back on the ball to make a bunch of dead physicists proud... } }; Please let me know if you have any questions about this class... Most of the other methods should be pretty self-explanatory though. You should be able to drop it in and be on your way to a consistent, robust event model for all your objects :-) Enjoy! Sincerely, Ryan...

Hi, Having searched google '[R] aov effect size' without any results I wonder if I not completely miss something. Is there any R function that calculates the effect size of an AOV's main effect or interaction effect? It should be related to the F's and the degree of freedom of the error, but the multitude in numbers in aov() baffle me a bit. Thanks, ---david

...oettingen, > Germany > ----------------------------------------- > Tel +49-551-397286 FAX +49-551-397279 > ========================================= > > > mauede@alice.it wrote: >> Dear Prof. Zucchini, >> >> My name is Maura Edelweiss. >> I am a physicist (just graduated from Washington University) with a genuine interest in Statistical Signal Processing. >> Dr. Lamb and I are trying to build a model of human breathing from some breathing signals. >> SSA and some extra analysis (R and C++ code ) show that there are only a few breathing...