------------------------------
Message: 5
Date: Mon, 23 Sep 2013 15:29:54 +0000
From: "Lee, Laura" <laura....@ncdenr.gov>
To: "r-sig-ecology@r-project.org" <r-sig-ecology@r-project.org>
Subject: [R-sig-eco] convergence problems for zero-inflated model
Message-ID:
<2789d349964a854e9524a3cd0d759e042dbf0...@ncwwditmxmbx35.ad.ncmail>
Content-Type: text/plain
Hi all!
I'm using a zero-inflated model using the function 'zeroinfl' and running into
convergence
problems (system is computationally singular). How can I modify the code so it
does not calculate a Hessian matrix?
------
Hi....I think it is more important that you figure out why you have numerical
trouble. Most likely
your model is too complicated.....or you have included an interaction term for
which there is no data...or something like that.
Alain Zuur
-----------
Thanks,
Laura
_______________________________________________
R-sig-ecology mailing list
R-sig-ecology@r-project.org
https://stat.ethz.ch/mailman/listinfo/r-sig-ecology
