Topic: Utilities
Topic Description:
Basic R utilities used in many packages and functions, such as date and string manipulations, statistical distributions, geometry of lines and distances. The R package date is required for the two data functions.
File: utilities/distributions.r
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Function: fit.logistic
Function Description: fit.logistic
A function to fit a set of data y, observed at the vector x, to a generalized logistic function, using least squares.Function Arguments:
| Argument | Default Value |
|---|---|
| x | |
| y | |
| start.param | |
| tech | "Nelder-Mead" |
Function Source:
fit.logistic=function(x,y,start.param,tech="Nelder-Mead")
{
fit=optim(start.param,logistic.sum.squares,x=x,obs=y,method=tech,control=list(maxit=50000))
return(fit)
}
{
fit=optim(start.param,logistic.sum.squares,x=x,obs=y,method=tech,control=list(maxit=50000))
return(fit)
}