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Dear Sir/Madam, I am a MSc student of Biostatistics. For my thesis, I used R to simulate data. Surprisingly, when I wrote the code below in R14, the output was a vector full of "FALSE"s. Would you please check and let me know why this happend? ti=seq(1,10,by=0.1) ti==2.9 I'm looking forward to receiving your reply. Thank you Elham K.Moez [[alternative HTML version deleted]]

Dear friends. I use nls() and encounter the following puzzling problem: I have a function f(a,b,c,x), I have a data vector of x and a vectory y of realized value of f. Case1 I tried to estimate c with (a=0.3, b=0.5) fixed: nls(y~f(a,b,c,x), control=list(maxiter = 100000, minFactor=0.5 ^2048),start=list(c=0.5)). The error message is: "number of iterations exceeded maximum of