Displaying 2 results from an estimated 2 matches for "splus7".
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2006 Dec 30
2
Error: cannot take a sample larger than the population
Hi,
In Splus7 this statement
xlrmN1 <- sample(c(0,1,2),400 ,prob=c(0.02 ,0.93 ,0.05 ))
worked fine, but in R the interpreter reports that the length of the
vector to chose c(0,1,2) is shorter than the size of many times I want
to be selected from the vector c(0,1,2).
Any good reason?
See below the error....
2006 Oct 12
0
4PL algorithm
WinXP, Splus7 and R2.3.1.
All,
I have been using the SSfpl and SSlogis self-starting functions
in the nlme library to fit 4PL and restricted 4PL models. I need
to adapt these routines to fit the alternative model
f(x) = A + (B-A)/(1 + abs(x/EC50)^C)
My Question: How do I obtain good starting values for...