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2005 May 26
0
Confidence intervals for prediction based on the logistic equation
...8", "29", "30", "31", "32", "33", "34", "35", "36", "37", "38", "39", "40", "41", "42")) #function to bootstrap the model EC50C <- function (xdata,i) { nlsdata <- xdata[i,] Sur.nls <- nls( PCTSurv ~ 100/(100 + exp(( xmid - (LogWBCTEQa) )/scal ) ), data = nlsdata, start = list( xmid = 0, scal = 1 ), alg = "plinear", trace = TRUE ) #output xmid, modify to calc EC50 (if PCTS...