search for: 201,300

Hi all, I would like to ask your help to add a color band (Ι am not sure regarding the right term, this color band at the right of the plot "describing" values with their corresponding color. For now I have only this code test<-matrix(data=runif(10000),nrow=100) plot(test,axes="FALSE") axis(1,at=c(0,1),labels=c("a","b")) # but  I would like to add

...e. Error in eigen(a$hessian) : infinite or missing values in 'x' What's even more confusing is that if I estimate the model for a sample say data[1:200,] then there's convergence. If I estimate it for data[1:300, ] then I get the error message. But if I estimate the model for data[201,300] it once again converges. Can anyone please enlighten me; where does this error stem from and what can I do about it? Thank you in advance. Kristian [[alternative HTML version deleted]]