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| + | ====== Example 15 ====== | ||
| + | Download [[http://didgeridoo.une.edu.au/km/download.php?file=example15.tar.gz|example15.tar.gz]] | ||
| + | |||
| + | This example illustrates how to pool estimates of covariance | ||
| + | components by (penalized) maximum likelihood using WOMBAT. | ||
| + | |||
| + | The example is comprised of 14 traits, with 6 traits measured on few animals and the remaining records representing 4 traits with measures | ||
| + | on males and females treated as different traits (Results from Meyer 2007; J. Anim. Breed. Genet, 124:50-64). There are results from 76 | ||
| + | bivariate and one six-variate analysis to be combined. Due to traits measured on different subsets of animals (sexes) there are a number of | ||
| + | residual covariances which are to be fixed at zero. | ||
| + | |||
| + | A: All part analyses have been carried out using WOMBAT and a `full' parameter file is available | ||
| + | |||
| + | B: Results from part analyses are summarized in a single file and a `minimum' parameter file is used. | ||
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| + | |||
| + | ---- | ||
| + | |||
| + | Additional documentation for pooling is available in a set of notes which summarises the | ||
| + | relevant options and directives available in WOMBAT, and shows a small, 4-trait example: | ||
| + | |||
| + | {{:wombat:rnote_wombatpool.pdf|RNote_WOMBATPool.pdf}} | ||
| + | |||
| + | ---- | ||
| + | <bibtex> | ||
| + | @Article{km12, | ||
| + | author = {Meyer, K.}, | ||
| + | title = {A penalized likelihood approach to pooling estimates | ||
| + | of covariance components from analyses by parts}, | ||
| + | journal = {Journal of Animal Breeding and Genetics}, | ||
| + | year = 2013, | ||
| + | volume = 130, | ||
| + | number = 4, | ||
| + | url = {http://dx.doi.org/10.1111/jbg.12004}, | ||
| + | doi = {10.1111/jbg.12004}, | ||
| + | pages = {270--285} | ||
| + | } | ||
| + | </bibtex> | ||
