Project Information |
eric.ward brice.semmens
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Description
This project is a variation of stable isotope mixing models. Previous approaches have fixed source parameters (mean, variance) at their MLE estimates, and proceeded to do a Bayesian analysis of the mixture of consumer diets. This assumption is fine when sample sizes are large, but often in ecology, they are small. Incorporating this uncertainty adds additional parameters, and slightly increases the total variance of mixture estimates, but has the advantage of improving mixing and reducing bias. Often, using the traditional approach may lead to multi-modal estimates of the mixture; we demonstrate that the fully Bayesian mixing model avoids this problem. A final benefit is that it allows prior information about sources to be included.
The code folder contains the code to replicate the comparison done with simulated datasets.
Files
Bayesian SI mixing models / code /
Download
| Name | Status | Rev | Size | Updated | Downloads | Brief Description | Actions |
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Parent directory
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| bayes model.txt |
Stable
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2 | 1.07 KB | 11/20/2009 07:14 PST | 154 154 | (none) |
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| mixSIR model.txt |
Stable
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1 | 646 B | 10/23/2009 14:17 PDT | 123 123 | (none) |
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| readme.txt |
Stable
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1 | 641 B | 10/23/2009 14:23 PDT | 150 150 | (none) |
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| R_script.R |
Stable
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1 | 3.95 KB | 10/23/2009 14:36 PDT | 162 162 | (none) |
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Downloads
229 project downloads617 individual file downloads