# Path analysis of natural selection via survival and fecundity across contrasting environments in Avena barbata.

### Description

Covariance matrices and syntax of the models in the paper by Latta & McCain 2009.

### Usage

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### Format

Three covariance matrices and two character vectors containing data and model specification.

### Note

The syntax in `latta.greenhouse.model`

is that of the model in
page 2463, figure 2. The vectors `latta.hopland.model`

and
`latta.sierra.model`

represent the models in page 2465, figures 3
and 4. We get fairly similar unstandardised and standardised path
coefficients, but not nearly similar maximum likelihood chi-squared
values. The covariance matrices were made available by the authors in
the supporting information.

### Source

Article:

http://onlinelibrary.wiley.com/doi/10.1111/j.1420-9101.2009.01857.x/abstract

Supplementary information:

http://onlinelibrary.wiley.com/doi/10.1111/j.1420-9101.2009.01857.x/suppinfo

### References

Latta, RG and McCain, C. 2009. Path analysis of natural selection via
survival and fecundity across contrasting environments in *Avena
barbata*. Journal of Evolutionary Biology 22: 2458-2469.

### Examples

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## Not run:
data(latta)
cat(latta.greenhouse.model)
cat(latta.hopland.model)
cat(latta.sierra.model)
latta.greenhouse.fit <- sem(latta.greenhouse.model, sample.cov =
latta.greenhouse.cov, sample.nobs = 188)
latta.hopland.fit <- sem(latta.field.model, sample.cov =
latta.hopland.cov, sample.nobs = 188)
latta.sierra.fit <- sem(latta.field.model, sample.cov =
latta.sierra.cov, sample.nobs = 188)
summary(latta.greenhouse.fit, standardize = TRUE)
summary(latta.hopland.fit, standardize = TRUE)
summary(latta.sierra.fit, standardize = TRUE)
## End(Not run)
``` |