I2 | R Documentation |

I2 represents the amount of heterogeneity relative to the total amount of variance in the observed effect sizes (Higgins & Thompson, 2002). For three-level meta-analyses, it is additionally broken down into I2_w (amount of within-cluster heterogeneity) and I2_b (amount of between-cluster heterogeneity).

```
I2(x, ...)
```

`x` |
An object for which a method exists. |

`...` |
Arguments passed to other functions. |

Numeric matrix, with rows corresponding to I2 (total heterogeneity), and optionally I2_w and I2_b (within- and between-cluster heterogeneity).

```
I2(matrix(1:20, ncol = 1))
```

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