After a run multdrc comment in R program, show warning sign in this program. I attached the saving page of the script. I hope you could help me, please. Thanks a lot A. Rahbari

R : Copyright 2005, The R Foundation for Statistical Computing Version 2.1.0 (2005-04-18), ISBN 3-900051-07-0

R is free software and comes with ABSOLUTELY NO WARRANTY. You are welcome to redistribute it under certain conditions. Type 'license()' or 'licence()' for distribution details. Natural language support but running in an English locale R is a collaborative project with many contributors. Type 'contributors()' for more information and 'citation()' on how to cite R or R packages in publications. Type 'demo()' for some demos, 'help()' for on-line help, or 'help.start()' for a HTML browser interface to help. Type 'q()' to quit R. > library(drc) Loading required package: MASS > library(drc) > choose.files() [1] "D:\\R\\EPTC.csv" > mydata<- read.csv ("D:\\R\\EPTC.csv", sep=",", dec=".", header=TRUE) > mydata Dose Herbicide Survival 1 0.00 EC 100.00000 2 1.23 EC 89.76064 3 2.46 EC 59.84043 4 3.69 EC 29.92021 5 4.92 EC 33.24468 6 0.00 EC 100.00000 7 1.23 EC 96.55172 8 2.46 EC 37.93103 9 3.69 EC 30.34483 10 4.92 EC 27.58621 11 0.00 EC 100.00000 12 1.23 EC 88.23529 13 2.46 EC 50.00000 14 3.69 EC 37.64706 15 4.92 EC 32.35294 16 0.00 MC 100.00000 17 1.23 MC 43.47826 18 2.46 MC 52.17391 19 3.69 MC 43.47826 20 4.92 MC 39.13043 21 0.00 MC 100.00000 22 1.23 MC 61.11111 23 2.46 MC 16.66667 24 3.69 MC 33.33333 25 4.92 MC 38.88889 26 0.00 MC 100.00000 27 1.23 MC 81.81818 28 2.46 MC 54.54545 29 3.69 MC 45.45455 30 4.92 MC 31.81818 > mydata1 <- multdrc (Survival ~ Dose, Herbicide, fct = l4(names = c("Slope", > "Upper Limit", "Lower Limit", "ED50")), data=mydata) There were 36 warnings (use warnings() to see them) > warnings() Warning messages: 1: NaNs produced in: log(x) 2: NaNs produced in: log(x) 3: NaNs produced in: log(x) 4: NaNs produced in: log(x) 5: NaNs produced in: log(x) 6: NaNs produced in: log(x) 7: NaNs produced in: log(x) 8: NaNs produced in: log(x) 9: NaNs produced in: log(x) 10: NaNs produced in: log(x) 11: NaNs produced in: log(x) 12: NaNs produced in: log(x) 13: NaNs produced in: log(x) 14: NaNs produced in: log(x) 15: NaNs produced in: log(x) 16: NaNs produced in: log(x) 17: NaNs produced in: log(x) 18: NaNs produced in: log(x) 19: NaNs produced in: log(x) 20: NaNs produced in: log(x) 21: NaNs produced in: log(x) 22: NaNs produced in: log(x) 23: NaNs produced in: log(x) 24: NaNs produced in: log(x) 25: NaNs produced in: log(x) 26: NaNs produced in: log(x) 27: NaNs produced in: log(x) 28: NaNs produced in: log(x) 29: NaNs produced in: log(x) 30: NaNs produced in: log(x) 31: NaNs produced in: log(x) 32: NaNs produced in: log(x) 33: NaNs produced in: log(x) 34: NaNs produced in: log(x) 35: NaNs produced in: log(x) 36: NaNs produced in: log(x) > save.image("C:/Documents and Settings/Spring/Desktop/1.RData") >

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GraphAppPrintJob.pdf**

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