[R] Problem specifying Gamma distribution in lme4/glmer
dieter.menne at menne-biomed.de
Sun Mar 21 17:00:17 CET 2010
Ben Bolker wrote:
> 3. zero-inflated data may not be particularly well-represented
> by a Gamma distribution: if you actually have a significant number
> of exactly-zero values, you may want to analyze your data in two
> stages, first as a presence-absence problem and then as a conditional
> density (i.e., what is the distribution of the non-zero values)?
Interesting idea. Do you know of a example where this was done (independent
of lmer)? We have similar data, were people are either symptom free (50%
with score 0), and the rest is smoothly distributed.
View this message in context: http://n4.nabble.com/Problem-specifying-Gamma-distribution-in-lme4-glmer-tp1676344p1676746.html
Sent from the R help mailing list archive at Nabble.com.
More information about the R-help