Extract Center of Gravity Estimates

[kkurth7]

Hello,

What is the best way to obtain/extract center of gravity coordinates by year? I have found advice including this thread pfmc-assessments/geostatistical_delta-GLMM#12 and the function plot_range_edge, but the former seems related to the deprecated package and the latter did not seem to extract coordinates. Is there a function to accomplish this in VAST?

Are the .rmd single and multi-species vignettes referenced in old materials archived somewhere? If possible, I would like to access them to work through examples with more guidance than the example code. Thank you!

Katherine

[James-Thorson-NOAA]

?plot_results references plot_range_index, and output is returned as a tagged element of the returned list by plot.fit_model.

Janelle Morano and I have been translating the example code to a Jekyl website that includes more interpretation here. Does that suffice, or any recommendations?

[kkurth7]

Thank you for your quick reply, Jim! Can you clarify the units for COG_hat? They don't align with latitude and longitude or UTM locations in the Bering Sea (I'm using the EBS pollock example data) and I can't discern the units from the source code.

The additional information on the Jekyl website is helpful, thank you for the link. Personally, for me as a very new user of VAST, it would be helpful to have a basic example (like the EBS pollock data example code) described with model choices explained and output interpretation. For example, I was watching the Week 8 Lab lecture on the FishStats YouTube channel and heard that multispecies models are too sensitive for science issues such as climate-impact analyses. However, I haven't come across general recommendations like this in the form of a basic example and am unsure what current recommendations are and what only applies to the deprecated package.

[James-Thorson-NOAA]

Please email me about the COG units ... they're in the units for fit$data_list$Z_gm and should be in UTM km by default.

default choices for multivariate models are not documented anywhere, but happy to collaborate on expanding Jekyl website or a paper :)