Hello, I hope you can help with a doubt I have with my data. I want to perform a dose-response metanalysis in R, however some of my studies only have two doses. How should I proceed with this? I have tried for many times and keeps appearing the mistake: Error in diag(cx[v != 0] + cx[v == 0], nrow = sum(v != 0)) : 'x' must have positive length. Thankss for your help!
