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Hello: I am generating a random number with rnorm(1). The generated number has 8 decimals. I don't want so many decimals. How to control the number of decimals in R? Thanks! Zhongmiao Wang

Hello, I keep getting the error message "Error in lme.formula(fixed = Score ~ factor(time) - 1, data = ldata, random = list(dumid = mat), : iteration limit reached without convergence (9)" Is there a way to set up starting values, especially the starting...

Hello, My study is to predict the likelihood an insurance policy holder will not renew his policy in the coming expiration date. My data has about 60% censoring and they are random, because customers buy insurance at different time, however...

Hello: I am studying the effect of schools on student achievement growth over time. School effect is random. The effects of schools in prior years are assumed to be persistent till the current year. Thus, the total school effect in...

Hello, I can do it seperately, but there must be a method to convert the 450 columns together? By the way, Can R write a seriers of variable names in a short way, such as X1-X450? I can extract...

Hello, I have used nlme to fit a model, the R syntax is like fmla0<-as.formula(paste("~",paste(colnames(ldata[,9:13]),collapse="+"),"-1")) > fmla1<-as.formula(paste("~",paste(colnames(ldata[,14:18]),collapse="+"),"-1")) > fmla2<-as.formula(paste...