Timeline for Is it necessary to transform the tide variable using a truncated Fourier series for GLM (Gamma), and how should I interpret interactions? [closed]
Current License: CC BY-SA 4.0
8 events
| when toggle format | what | by | license | comment | |
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| Jul 21 at 7:07 | comment | added | Jo Harris | @NickCox Thank you for your feedback; it was very helpful | |
| Jul 21 at 7:07 | comment | added | Jo Harris | @NickCox Good guess. I'm a postdoc and a masters student has asked for assistance. The student is replicating a peer-reviewed publication (where fish were shown to only feed at high tide, when biomass it highest) and is keen to match the analysis as closely as possible. However, after a few extra days of mulling it over in the back of my head, it is not as relevant to their study location as it was in the original paper. For context, I almost always use BRTs as my datasets are usually >10k observations, so I have been working to refresh my memory of GLMs. Thank you for your helpful feedback | |
| Jul 19 at 23:20 | history | closed |
Nick Cox PBulls kjetil b halvorsen♦ |
Needs more focus | |
| Jul 19 at 14:48 | review | Close votes | |||
| Jul 19 at 23:20 | |||||
| Jul 19 at 14:29 | comment | added | Nick Cox | A generalized linear model with log link seems bang on to me, but this isn't such a large dataset that you can easily afford too complicated a model. I can easily imagine that the data collection was long and hard and wet. | |
| Jul 19 at 14:27 | comment | added | Nick Cox | These look like questions a PhD student might bring to a meeting, within a context of known project and dataset. There are conversely many assumptions here about what we might understand despite the detail you give. From a quick look at the data: The difference between NF and A has biological meaning but doesn't seem to have an impact. I wouldn't call using sines and cosines here a transformation (even though it is) but rather a means to parameterise a circular predictor. Which terms you use depends on some biology that I can't impute,:what kind of dependence on the tide level do you expect? | |
| Jul 19 at 7:27 | history | edited | Jo Harris | CC BY-SA 4.0 |
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| Jul 18 at 10:08 | history | asked | Jo Harris | CC BY-SA 4.0 |