Displaying 1 result from an estimated 1 matches for "csexponential".
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biexponential
2004 Jun 25
1
understanding nlm
Hi,
I am using the nlm() function to fit the following exponential function to
some data by minimizing squared differences between predicted and observed
values:
csexponential<- function(x, t1, ti, p){
ti + abs(t1 - ti)*(exp(-(p*(x-1))))
}
As background, the data is performance measured across time. As you might
imagine, we get rapid improvement across the first couple of time points and
then the improvement becomes more gradual. In psychology this is known as
t...