search for: stimulating

Hi all, I need to check for a difference between treatment groups in the parameter of the geometric distribution, but with a cut-off (i.e. right censored). In my experiment I stimulated animals to see whether I got a response, and stopped stimulating if the animal responded OR if I had stimulated 10 times. Since the response could only be to a stimulation, the distribution of response times is discrete (so I can't use survival analysis). I am interested in assessing at what stimulation number the animals responded, and whether this diff...

Hi all, I am currently doing a consistency analysis using an lmer model and trying to use parametric bootstrapping for the confidence intervals. My model is like this: model<-lmer(y~A+B+(1|C/D)+(1|E),binomial) where E is the individual level for consistency analysis, A-D are other fixed and random effects that I have to control for. Following Nakagawa and Scheilzeth I can work out the

Hi, I have tried to use uniroot to solve a value (value a in my function) that gives f=0, and I repeat this process for 10000 times(stimulations). However error occures from the 4625th stimulation - Error in uniroot(f, c(0, 2), maxiter = 1000, tol = 0.001) : f() values at end points not of opposite sign I have also tried interval of (lower=min(U), upper=max(U)) and it won't work as well.

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...ed plot, each panel may be on a different scale. Example. ? Plot Estrogen, Creatinine, and their ratio; all by the same predictor variable (say, Day). Or: In a longitudinal study of hormones in reproductive-age women, plot progesterone, estradiol, testosterone, luteinizing hormone, follicle-stimulating hormone, and thyroid-stimulating hormone all on one page, parallel. Note that several of these variables are measured in different units. ? One panel for each outcome variable, arranged one above the other. ? Minimal vertical space between the panels. To make this concrete, let's generat...

The (*windows only*) xlsReadWrite package has been updated and the new version is available on CRAN. xlsReadWrite natively reads and writes Excel files (v97 - 2003). o Changes from v1.1.1 to v1.3.3 (versions between never really published) - ROWNAMES-support also for matrices (not only for data.frame) - explicit rowNames argument in interface. (stimulated by email Adrian Dusa) -

...They stimulate mental responses in the domain of perception of spatial relationships. Numbers, and text, on the other hand, while still shapes from the optical point of view, up to the point of their impact on the retina, provoke different perceptions. They are interpreted "analytically" stimulating mental responses in the domains of language and number. There is no Law whatever which requires that the two must be separated. It may be that adding any annotation to a graph or diagram will interfere with the "intuitive" imterpretation that the diagram is intended to stimulate, with n...

hello people, I want to make a biased dice using the sample() function and print out the results after n number of runs, I've successfully generated the dice using the following command: mydie2<-function(n=1000,y=NULL,...){ for(i in 1:n){ x<-sample(1:6,n,replace=TRUE,prob=c(1,1,2,3,2,1)/10) x=runif(n) if(x<=1/10){y[i]=1} else if(x<=2/10){y[i]=2} else if(x<=4/10){y[i]=3} else

Gordon Henriksen wrote: > On 2007-09-15, at 23:55, Talin wrote: > >> Gordon Henriksen wrote: >> >>> Can you be more specific the algorithm for which you need type >>> metadata in a write barrier? No algorithms I am aware of perform any >>> tracing from a write barrier. >> >> This one does: >> >>

These are some points stimulated by reading about C history (and related in their implementation). 1) On some platforms > as.integer("0xA") [1] 10 but not all (not on Solaris nor Windows). We do not define what is allowed, and rely on the OS's implementation of strtod (yes, not strtol). It seems that glibc does allow hex: C99 mandates it but C89 seems not to allow it. I

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After attending my first useR! conference I want to thank the organizers for doing a wonderful job and the presenters for their high quality presentations and stimulating ideas. The conference venue was excellent and of course Vienna is one of the greatest cities in the world to visit. useR! is one of the most fun conferences I've attended. Thanks again! -- Frank E Harrell Jr Professor and Chair School of Medicine Departm...

...uot;myXML" can't be installed.) Could anybody tell me what's the tricks to keep those folders in my installation? I'm using R-2.5.1 under WinXP. Thank you very much! ....Tao _________________________________________________________________ Need a brain boost? Recharge with a stimulating game. Play now!?

Hello, We are trying to figure out how to preserve the low-frequency content when we try to convert a .wav file to an .opus file. What settings in Opus that can accomplish this? Sincerely, Vinson Go cid:image001.png at 01C94EE1.4DA09EF0 TBSI - SIMPLICITY in Neuro-Solutions <http://www.tbsi.biz/> Tethered and Wireless Solutions for Neural Recording and Stimulation Vinson

Dear R list, I would like to perform an ANOVA in a set of measurements, but I have problems formatting the data. The data is a two dimensional array containing two columns: - "Stim" : the type of stimulation (string) - "Ratio" : a ratio of two numeric values Now, because some values are missing in the data (defaulting to zero), part of this array will be populated with NA

Breaking News - Powell resigns as FCC Chair Federal Communications Commission (FCC) Chairman Michael Powell announced his resignation today (January 21, 2005) and will step down in March. In a brief statement on the FCC's website (www.fcc.gov) Powell said, "Having completed a bold and aggressive agenda, it is time for me to pursue other opportunities and let someone else take the reins

...agnostics, and other biologics used to manage animal diseases. It is located on the campus of the National Centers for Animal Health in Ames, Iowa, where it maintains a close affiliation with the other animal disease centers on the campus and with nearby Iowa State University. Ames is known for its stimulating cultural environment, pleasant surroundings, and stable economy. It is 40 minutes north of Des Moines International Airport. Employment benefits include flexible work schedule, ten paid federal holidays, liberal leave allowance (annual leave, sick leave, and family friendly leave policy), retireme...

Dear R-Listers, to measure the psychometric curve of pitch discrimination, one sequentially presents two tones of slightly different pitch to an observer (animal will do), and asks "which is higher". The pschometric curve is the fraction of correct responses plotted against the pitch difference. It passes through 50% (pure guessing) at zero and normally approaches 100% at large

This is a question about the use of the Cox proportional hazards model to analyze event histories. I am looking at the responses of sympathetic nervous system activity to a stimulus. The activity I observe is a burst that can only occur once per heart beat cycle (e.g., a binary count). Typically bursts occur in 60-80% of the heart cycles * sensory stimuli can modify these burst probabilities.

Folks: In answer to a query, Andy Liaw recently submitted some code to construct a block diagonal matrix. For what seemed a fairly straightforward task, the code seemed a little "overweight" to me (that's an American stock analyst's term, btw), so I came up with a slightly cleaner version (with help from Andy): bdiag<-function(...){ mlist<-list(...) ## handle case in