sigma_ref | R Documentation |

Computes the reference standard deviation of the given meta-analysis data set. The reference standard deviation is defined as the geometric mean of the standard deviations of the individual studies (Sorbye & Rue 2014, equation (7)).

```
sigma_ref(df)
```

`df` |
data frame with one column "sigma" containing the standard errors of the estimates for the individual studies. |

The reference standard deviation of the data set. Non-negative real number.

Sorbye, S., Rue, H. (2014). Scaling intrinsic Gaussian Markov random field priors in
spatial modelling. *Spatial Statistics* **8**, 39–51.
\Sexpr[results=rd]{tools:::Rd_expr_doi("10.1016/j.spasta.2013.06.004")}

```
# reference sd for resporiratory tract infections (RTI) data
data(rti)
sigma_ref(df=rti)
```

Embedding an R snippet on your website

Add the following code to your website.

For more information on customizing the embed code, read Embedding Snippets.