I would like to plot a model with ggplot2. I have estimated a robust variance-covariance matrix which I would like to use when estimating the confidence interval. Can I tell ggplot2 to use my VCOV...

I got a program which contains a lot of std::cerr, it directly outputs to my terminal. I am wondering what is the difference between std::cerr and std::cout. And how can I disable the std::cerr (I ...