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2012 Feb 06
3
Duplicate rows when I combine two data.frames with merge!
...78,89),c(3.5,5.5,5.9)) #sets up 1000 random numbers for age 3,4,5 x.3<-sample(x[,1],60) #randomly selects 60 lengths from age 3 x.4<-sample(x[,2],740) x.5<-sample(x[,3],200) length<-c(x.3,x.4,x.5) length<-round(length,digits=0) #rounds lengths to whole number age3<-rep(3,60) age4<-rep(4,740) age5<-rep(5,200) age<-c(age3,age4,age5) #combines ages into one vector unique<-1:1000 #gives each fish a unique id pop<-data.frame(unique,length,age) pop<-pop[sample(1:1000,size=1000,replace=FALSE),] #randomized the order of pop c.one<-pop[sample(1:1000,size=100...
2010 Sep 12
3
reshape matrix entities to columns
Greeting R helpers J I am not familiar with R but I have to use it to analyze data set that I have (30,000 20,000) I want to change the structure of the dataset and I am wondering how that might be possible in R A main data looks like this: some entities are empty Age No. Age No. Age No. Center1 5 2 8 7
2020 Sep 21
2
Help with the Error Message in R "Error in 1:nchid : result would be too long a vector"
Hello everyone, I am using *mlogit* to analyse my choice experiment data. I have *3 alternatives* for each individual and for each individual I have *9 questions*. I have a response from *516 individuals*. So it is a panel of 9*516 observations. I have arranged the data in long format (it contains 100 columns indicating different variables and identifiers). In mlogit I tried the following