search for: stimul

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...

...l and the residual variance is fixed at 1). attr(lme4::VarCorr(model)$E, "stddev")^2 / (1*(pi^2)/3 + attr(lme4::VarCorr(model)$E, "stddev")^2 + attr(lme4::VarCorr(model)$C, "stddev")^2 + attr(lme4::VarCorr(model)$D, "stddev")^2 ) My question is can I use stimulate(model) to generate values that I can then use to do parametric bootstrap analysis and generate the confidence intervals? Something like this: n<-length(A) niter<-1000 y<-matrix(nrow=n,ncol=niter*2) for (i in 1:niter) { y[,I(i*2-1):I(i*2)]<-simulate(model)[,1] } rvalues<-numeri...

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. Can anyone help me as I have struggled...

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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 ge...

...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) - support for DATE and TIME values: Excel date and/or time values can be retrieved as ISO-8601 format string. - Either explicitly with the colClasses entries: - "isodate" as "YYYY-MM-DD" - "isotime" as "hh:mm:ss&quo...

...resenting points in a scatterplot, ... ) are interpreted, so to speak, "intuitively" -- the resulting perception is formed by processes which are hard to ascertain consciously, and the overall effect can only be ascertained by looking at it, and noting what impression one has formed. 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...

...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 if(x<=7/10){y[i]=4} else if(x<=9/10){y[i]=5} else{y[i]=6} } bar<-barplot(table(y)) table<-table(y) return(list(bar,table)) } mydie2() but I also want to try to create the same dice stimulation using ifelse() statement, but all hell break loose when I attempt to use the command below (the barplot only shows the results to be 6), can anyone tell me what went wrong please: 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=r...

...stest collector, I just want to create something that people can build on. There are a lot of algorithms out there that require similar underlying data structures - an efficient heap, lock-free work queues, and so on. I figure if I can provide those along with a working example, it may help to stimulate further development. I chose this particular algorithm to start with because it seemed fairly easy to implement. Eventually I want to do a multi-generation design - most of the research papers out there seem to settle on a per-thread copying collector for young generations, and a heap-based...

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 g...

...g each of the zones would result in better recovery. Prior efforts had evolved from single-stage, limited entry treatments to multiple-stage treatments with composite frac plugs and frac baffles. microelectrophoretically Core tests on offset acreage had revealed that 3 of 10 coal seams had not been stimulated by these treatments and, on average, ten feet of coal was not being effectively stimulated. If the CT fracturing approach is successful in improving this situation, CONSOL calculated that an additional net present value of 1 million could be added per 160-acre lease, based on a gas price of 2.5...

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 De...

...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!?

Admit it, Rolf. Haven't you wondered if S, in a more private way, is sexier than R? OK, kidding aside, we have talked this to death. Just FYI, the conversation was stimulating for some of us and I have continued on my own and located functions I see as useful in the stringi and stringr packages to make my silly version ever less silly! LOL! -----Original Message----- From: Rolf Turner <rolfturner at posteo.net> Sent: Saturday, September 28, 2024 10:11 PM To...

...nt 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 Go Director of Research & Development EMail: <mailto:dfan at trianglebiosystems.com> vgo at trianglebiosystems.com Website: <http://www.trianglebiosystems.com/> www.trianglebiosystems.com Triangle BioSystems International a division of Harvard Bioscience...

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 ratios. Maybe this is important later. In order to make the ANOVA analysis, I need to turn my vector into a data.fr...

I know you didn't want to stimulate discussion, but the problem is not confined to publication. "Adverse reaction to medication" monitoring programs are plagued by a similarly massive under-reporting problem: adverse reactions are seldom reported unless they are particularly bad or surprising. (The Ministry of Health i...

...own 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 of the agency. During my tenure, we worked to get the law right in order to stimulate innovative technology that puts more power in the hands of the American people, giving them greater choices that enrich their lives." Speculation had been high before the November elections that Powell would be leaving the FCC regardless of who won the presidency. In January, industry insi...

...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), ret...

...tic curves and compare the 75% correct "threshold" values (whatever threshold means). I want to handle the case similar to the budworm example in MASS (glm(SF~sex*ldose, family=binomial)). My basic idea is that the 2AFC forced choice psychometric curve, normally only defined for positive stimuls differences, could conceptually be continued to negative values by mirroring the values at (0,0.5) to get the whole binomial/logistic curve. As far as I can see, the result would be correct if we divide the counts for a stimulus difference equally between positive and negative branch, with correct...