admb_real:uncertain_catch
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admb_real:uncertain_catch [2010/09/14 15:29] – created lennartfr | admb_real:uncertain_catch [2010/09/27 12:06] (current) – lennartfr | ||
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+ | ====== NOTE: This section is largely obsolete! ====== | ||
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+ | FIXME This model may well not be the one we will end up using, so the results in this section should be taken with a pinch of salt. // | ||
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===Models with uncertainties in the catch data=== | ===Models with uncertainties in the catch data=== | ||
- | It is unrealistic to assume that the catch data avaible from the ICES AFWG reports are without error. For this reason we make the following | + | It is unrealistic to assume that the catch data avaible from the ICES AFWG reports are without error. For this reason we make the following |
Replace the recurrence relation: | Replace the recurrence relation: | ||
+ | ^N< | ||
with: | with: | ||
+ | ^N< | ||
+ | where u is a latent variable vector with one component for each component of the catch data. It has expectation 0 , and standard deviation 1. The non-latent parameter s< | ||
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+ | :!: When this model is added to the previously defined models they have too many degrees of freedom. Therefore the catchability should be controlled somehow. We try the model with two separate catchabilities, | ||
+ | |{{: | ||
+ | Although the population trajectories are not too different from the [[admb_real: | ||
- | where u is a latent variable with expectation 0 , and standard deviation s< |
admb_real/uncertain_catch.1284478162.txt.gz · Last modified: 2010/09/14 15:29 by lennartfr