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mem16
2008 May 29
1
cbind results to original data frame
I have the following script, which gives me a prediction for each of
my observations (> 49k), and subsets my data frame by site (n = 183):
ts <- (by(dem16,dem16['Site'],function(dat)
try(predict(nls(Tw ~ mu + ((alpha - mu)/
(1 + exp(gamma*(B - Mean_air)))),
data = dat,
start = list(mu = 0.8, alpha = 21.8, gamma = 0.22, B =
12.8),
algorithm = "port",
lower = list(0,0,0,0))))))...