r2 {BAT} | R Documentation |

## Model R2.

### Description

Calculates R2 from the summed squared differences between observed and estimated values.

### Usage

```
r2(obs, est = NULL, param = 0)
```

### Arguments

`obs` |
Either a model or a vector with observed values. |

`est` |
A vector with estimated values. Only used if obs is not a model. |

`param` |
Number of parameters in the model to calculate the adjusted R2 if > 0. If obs is a model param will be ignored and the number of parameters will be calculated from the model. |

### Details

Useful for models or functions that do not provide r2 values.

### Value

The r2 value.

### Examples

```
obs = c(1,4,5,6)
est = c(0,1,4,7)
#example using values
r2(obs, est)
r2(obs, est, param = 1)
#example using model
mod = lm(obs ~ est)
r2(mod)
summary(mod)$r.squared
r2(mod, param = 1)
summary(mod)$adj.r.squared
```

[Package

*BAT*version 2.9.6 Index]