gini.coef {dplR} | R Documentation |

## Calculate the Gini Coefficient

### Description

This function calculates the Gini coefficient on raw or detrended
ring-width series.

### Usage

```
gini.coef(x)
```

### Arguments

### Details

This calculates the Gini coefficient of inequality which is used as an
all-lag measure of diversity in tree-ring records – typically detrended
series. Lower values indicate lower diversity. The use of the Gini
coefficient in dendrochronology is described by Biondi and Qeadan (2008).
See Handcock and Morris (1999) for more information.

### Value

the Gini coefficient.

### Author(s)

Mikko Korpela, based on original by Andy Bunn

### References

Biondi, F. and Qeadan, F. (2008) Inequality in Paleorecords.
*Ecology*, **89**(4), 1056–1067.

Handcock, M. S. and Morris, M. (1999) *Relative Distribution
Methods in the Social Sciences*. Springer. ISBN:
0-387-98778-9.

### See Also

`rwl.stats`

### Examples

```
library(utils)
data(ca533)
ca533.rwi <- detrend(rwl = ca533, method = "ModNegExp")
ca533.crn <- chron(ca533.rwi)
gini.coef(ca533.crn)
```

[Package

*dplR* version 1.7.6

Index]