Comments (11)
Equation 12, the summation needs to include the full denominator. See Cochran for clarification.
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If I can get this done on the boat, that would be a miracle but I'm gonna make this a summer goal for myself.
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Nice, thank you Jason!
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@MargaretSiple-NOAA @Lewis-Barnett-NOAA
Can you look over this document which covers the math background to the design-based indices? No real timeline for this task, so whenever you have a dull moment you want to make duller..
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Hi Zack - sorry for the delay on this. I will check it out tomorrow morning.
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Very minor comments. I think these are partly just like, equation conventions that are slightly more confusing to me than the average math person. Everything looks really good!
- In "biomass and abundance calculations" section, add that
$n_i$ is the number of strata (it's very clear that that's what it is, but I'm just being extra about it!) - Also under biomass and abundance, add that
$I$ is the total count of subareas or strata. - Under age composition, change
$q$ to italics: index by q --> "indexed by$q$ " - I am sure
$q$ is the convention, but I also always try to remove it from stuff because it is such a stock assessment letter. Heaven forbid anyone think we're talking about catchability!
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The answer to why we provide mean length-at-age is kind of a shoulder shrug emoji. The SD (or SE?) is associated with the mean length, not the age comp and is equation is modified to account for different calculation weights. I will close this comment for now but feel free to open it back up if anything else comes up.
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Related Issues (20)
- Update documentation: get_data() output dfs
- Added functionality for multiple regions HOT 1
- Error checkpoints for calc_size_stratum_BS/AIGOA(): unavailable data
- Data pulls for model-based estimates HOT 3
- AI-GOA Age Data Upload Schedule HOT 5
- Data input for Agecomp scripts (PERFORMANCE codes) HOT 4
- gap_products area_id correction HOT 5
- Regional differences in size composition calculation HOT 3
- gapindex::get_data error in function : Error in fix.by(by.x, x) : 'by' must specify uniquely valid columns HOT 16
- calc_biomass_subarea bug HOT 1
- Issue with get_data() when there's no size/age data HOT 1
- AREA_ID = 99902 not returned from calc_biomass_subarea() HOT 5
- [tasks] Specify AFSC database in get_connected() HOT 2
- are all species in the spp_start_year table? HOT 2
- data access HOT 6
- SPECIES_CODE changes in GAP_PRODUCTS break functionality
- Name of functions for calculating comps by subareas/areas/regions HOT 2
- SPECIES_CODE changes in GAP_PRODUCTS break functionality HOT 11
- connecting to database via VM HOT 2
- gap_products not matching gapindex for agecomp HOT 9
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