[R] Zero Inflated Models - Plotting Results
lieslpe
liesl.erb at colorado.edu
Tue Oct 2 18:56:06 CEST 2012
Dear SamiC,
I am also attempting to plot my zero inflated model on my data. Did you find
a solution? Does anyone else on this list have a solution?
Thanks,
Liesl
Message from SamiC Jun 30, 2011:
I am fitting a zero inflated negative binomial model to my data. I have
pretty much got my selected model and now i am wanting to plot the model to
the origional data.
Example.
f8<-formula(Birds~Tide+Fish+Zooplankton+Chlorophylla|StratificationIndex)
Nb8<-zeroinfl(f8, dist="negbin", link= "logit", data=ocean)
Tide is a factor, so i assume i have to plot a different graph for each
level of the factor.
what i essentially want to do is plot a graph for each variables against
birds with the fitted line of the model.
I have been using the predict function, but i get the same trend for every
graph and variable. I was reading that the predict function gives a mean
across all the values (or something to this effect).
Does anyone know how to code for this in R. from the above model i want to
plot birds~fish (the original data) and then fit the line of the
relationship from the model.
--
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