Error in nls Error in if(any(start < low || start > upp)) {: missing value when TRUE/FALSE needed
Hi, I got this error every time when I put upper and lower bound on my parameters in nls. I'm not quite sure what this error is about. I also wanted to find the content of nls_port_fit. But typing this directly into R doesn't seem to give any result out. I also tried to see the content of If anybody could shed some light I'd greatly appreciate. Thank you. rc