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Does anyone know how to obtain a plot of residuals by predicted values for a main-effects aov? I want to check that the residuals are distributed equally across treatment means. Thanks, Jeff [[alternative HTML version deleted]]

I thought more about this last night after my email about putting an end to "Read the Manual" replies. It seems that there are a handful of R Super-Programmers. If I were one, I would get tired of 100's of questions like "How can I get my Excel file into R!!!". Concurrently, R is experiencing an exponential increase in new users to the extent that there are now

Hi all, I hope someone can help me with this. Suppose I import a text file and one of the columns looks like this: New York New York England Spain Spain Orlando New York England France I want to add a variable that is based on the previous one US US Europe Europe Europe US US Europe Europe How do that? Also, I would like to be able to export the data as

Does anyone know of an existing R package or code to run a mixed Hurdle model? I found glmmADMB, but that seems to be ZIP. Any recommendations? Thanks, Jeff [[alternative HTML version deleted]]

Hi all, Cameron and Trivedi in their 1998 Regression Analysis of Count Data refer to NB1 and NB2 NB1 is the negative binomial model with variance = mu + (alpha * mu^1) yielding (1+alpha)*mu NB2 sets the power to 2; hence, variance = mu + (alpha*mu^2) I think that NB2 can be requested via negbin2<-glm(hhm~sex+age,family=quasi(var="mu^2",link="log")) Is

Hi all, This should be easy, but I can't seem to figure it out. I have a table like this named newtable a1 a2 a3 a4 Cnts Score 1 1 0 0 4 3.28 1 0 1 1 2 2.63 I want the following: a1 a2 a3 a4 Cnts Score 1 1 0 0 4 3.28 1 1 0 0 4 3.28 1 1 0 0 4 3.28 1 1 0 0

Does anyone know if the discriminant coefficients in lda are standardized? Thanks, Jeff [[alternative HTML version deleted]]