# Data and tentative model syntax for the paper by Grace et al. 2010.

### Description

Grace et al. 2010 describe the use of structural equation meta-models to aid the translation of theory into structural equation models. They use an example where they relate plant diversity and community biomass to variations in environmental stress and disturbance.

### Usage

1 2 3 |

### Format

A covariance matrix and a character vector describing the model syntax.

### Note

Our model syntax does not converge in `lavaan`

or `stremo`

, but we
have included it anyway for learning purposes. The model we tried to
fit is on page 81, figure 7. The covariance matrix is on page 76,
table 2. There were 190 observations.

### Source

http://www.esajournals.org/doi/full/10.1890/09-0464.1

### References

Grace JB, Anderson TM, Olff H, and Scheiner SM. 2010. On the specification of structural equation models for ecological systems. Ecological Monographs 80: 67-87.

### Examples

1 2 3 4 5 6 7 8 | ```
## Not run:
data(grace)
cat(grace.model)
grace.fit <- sem(grace.model, sample.cov =
grace.cov,
sample.nobs = 190)
## End(Not run)
``` |