Hello All, I am searching for a package which allows me to run an LC50 (LD50) estimate using the trimmer spearman-karber method. Has any one developed code for this analysis? In my case, probit or logit analyses are less accurate. Please help! I will post code if I end up finding/writing it. Thank you, Pat -- View this message in context: http://r.789695.n4.nabble.com/Trimmed-Spearman-Karber-tp3336075p3336075.html Sent from the R help mailing list archive at Nabble.com.