[R] error in mixed logit model using mlogit function

tmp*`, value = "disto.disto") : attempt to set colnames on object with less than two dimensions I would be grateful for any help, thanks for reading this post. danielle -- View this message in context: http://r.789695.n4.nabble.com/error-in-mixed-logit-model-using-mlog

[R] error message - unexpected input

only user on this computer to run this program. The syntax line that appears to be causing problems is: dataname="Igt2model.txt" and the error message is: Error: unexpected input in "dataname="" Does anyone have any suggestions? Thanks for all of your help, Danielle

[R] creating multiple plots using a splitting factor

site) lapply(splitlist, hist(distance_cm, breaks=10)) I then get an error message saying that "match.fun" didn't find the function. Is there another way to produce multiple graphs at once? Thank you, Danielle B. Johnston, Habitat Researcher Colorado Division of Wildlife

Re: [R] creating multiple plots using a splitting factor

) having them displayed on the same page. Is there a way to do this? Danielle B. Johnston, Habitat Researcher Colorado Division of Wildlife -Original Message- From: Phil Spector [mailto:spec...@stat.berkeley.edu] Sent: Tuesday, November 10, 2009 12:46 AM To: Johnston, Danielle Subject: Re

[R] Error in anova.cca by="axis" after Vegan update

Hi, I am trying to replicate some code I previously used to undertake a dbRDA analysis, however since updating my R software and all associated packages to the latest version it seems the analysis does not work. I have two dist objects: gendist and geodist. I first reduce geodist using pcnm().

[R] Best way to specify a mixed ANCOVA in R?

e F-statistic and p-values for interactions with the covariate, as well as for the main effect of the covariate. Any advice on the best way to do this would be much appreciated. Thanks, Danielle __ R-help@r-project.org mailing list https://stat.ethz.ch/mai

[R] Looping over graphs in igraph

the graphs are treated completely separately so that community A in graph 1 need not have anything to do with community A in graph 2. I would really appreciate any ideas you guys have. Thank you! Danielle [[alternative HTML version deleted]] __

[R] multinomRob - error message

par, ...) : value out of range in 'lgamma' 11: In fn(par, ...) : value out of range in 'lgamma' Is my model uncorrectly defined? many thanks, danielle martin graduate student department of political science university of michigan _

[R] Survdiff for multiple comparisons

t with adjusted p-values. I was thinking about using subset, but this will not adjust the p-values for multiple tests. Thank you for your time - Danielle -- Danielle C. Zoellner-Kelly PhD candidate - DeWalt Lab Department of Biological Sciences Clemson University 132 Long Hall Clemson, SC 296

[R] Logistic Regression with genetic component

Greetings, I have a question that I'd like to get input on. I have a classic toxicology study where I artificially fertilized and exposed embryos to a chemical and counted defects. In addition, I kept track of male-female pairs that I used to artificially fertilize and generate embryos with. I need

[R] Calculating NOEL using R and logistic regression - Toxicology

Hello, I used the glm function in R to fit a dose-response relationship and then have been using dose.p to calculate the LC50, however I would like to calculate the NOEL (no observed effect level), ie the lowest dose above which responses start occurring. Does anyone know how to do this? [

Re: [R] Calculating NOEL using R and logistic regression - Toxicology

Thanks, that is interesting, but what I'm really after is an easy "no observed effect level", using a binomial logistic model ie glm. Have a great day! On Mon, Apr 2, 2012 at 3:38 PM, vito.muggeo wrote: > dear Danielle, > > The NOEL is a threshold value or breakpoint in

Re: [R] Calculating NOEL using R and logistic regression - Toxicology

= glm(Y~X,family=binomial) > plot(1:10, predict(glmfit,newdata=data.frame(X=1:10),type="response"), > type="l",ylim=c(0,1),xlab="X",ylab="Y") > rug(jitter(X[Y==0]),side=1) > rug(jitter(X[Y==1]),side=3) > > On Tue, Apr 3, 2012 at 3:19 PM, D

Re: [R] Calculating NOEL using R and logistic regression - Toxicology

Thanks everyone for the advice, you raise interesting points. Maybe the best thing for me to do is do an ANOVA in R with binomial data (if possible) and find the lowest dose that gives a significant difference from the controls. On Mon, Apr 2, 2012 at 2:45 PM, Danielle Duncan wrote: > Hello

Re: [R] Calculating NOEL using R and logistic regression - Toxicology

012 at 2:45 PM, Danielle Duncan wrote: > Hello, I used the glm function in R to fit a dose-response relationship > and then have been using dose.p to calculate the LC50, however I would like > to calculate the NOEL (no observed effect level), ie the lowest dose above > which responses start o