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{dsm} warning message "step size truncated due to divergence"
2 messages · Ricardo Lima, Ben Bolker
On 14-05-25 11:06 AM, Ricardo Lima wrote:
Hello, I'm trying to fit a density surface model, following "Spatial models for distance sampling data: recent developments and future directions" (Miller et al. 2013 - Methods in Ecology and Evolution 4 (11): 1001-1010). When I run the model, I get the following: "warning messages: 1: Step size truncated due to divergence 2: Step size truncated due to divergence 3: Step size truncated due to divergence 4: Step size truncated due to divergence 5: Step size truncated due to divergence " Then, when I try to use "predict", 17 grid cells (belonging to 5 groups) appear as "Inf", instead of having a value. And that keeps from mapping the predicted abundance or calculating the abundance for the entire survey area. Can you please help me understanding what this means and how I can get around this?
Pretty much impossible to say without more detail. I could go read the paper, but it would be more efficient if you could give a minimal reproducible example ... It sounds like your model is overspecified somehow ... Ben Bolker