Dear Luigi, On 2020-06-25 12:18 +0200, Luigi Marongiu wrote: > Hello, > I am trying to find the best fit to a > function for epidemic analysis. > I am trying with the package minpack.lm but > I don't really know how to use it.
Me neither ...
> So I have some questions:
> - how to solve the list problem? (what is
> the input for nlsLM? I have a vector with
> the actual values, shall I convert in a
> dataframe?)
I got past the error by give
minpack.lm::nlsLM X and Y in a data.frame
minpack.lm::nlsLM(
formula = y~(a*x^2)/(b^2 + x^2),
start=c(a=A, b=B),
data=data.frame(x=X, y=Y))
as per ?minpack.lm::nlsLM:
data: an optional data frame in which to evaluate the variables
in‘formula’ and ‘weights’. Can also be a list or an
environment, but not a matrix.
> - how to avoid infinitives?
> - is there another function other than
> nlsLM that I should use?
> - is there another function that could fit
> a sigmoid profile other than Holling type
> III?
These other questions seem good and
interesting, I hope someone else can answer
them.
Best,
Rasmus
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