wgdev {climwin} R Documentation

## Calculate within group deviance.

### Description

Calculate within group deviance of a variable. Used to test for 'within individual effects'. See methods outlined in van de Pol and Wright 2009 for more detail.

### Usage

wgdev(covar, groupvar)


### Arguments

 covar Continuous variable for which within group deviance will be calculated. Please specify the dataset in which the variable is found (i.e. data$var). groupvar Grouping variable within which deviance will be calculated. For example, individual ID or site/plot ID. Please specify the dataset in which the variable is found (i.e. data$var).

### Value

Returns a vector containing numeric values. This can be used to differentiate within and between group effects in a model. See function wgmean to calculate within group means. See van de Pol and Wright 2009 for more detail.

### Author(s)

Martijn van de Pol and Jonathan Wright

### Examples

# Calculate within year deviance in temperature from the MassClimate dataset.

data(MassClimate)

#Calculate year column
library(lubridate)
MassClimate$Year <- year(as.Date(MassClimate$Date, format = "%d/%m/%Y"))

#Calculate within year deviance of temperature
within_yr_dev <- wgdev(MassClimate$Temp, MassClimate$Year)

#Add this variable to the original dataset
MassClimate\$Within_yr_dev <- within_yr_dev



[Package climwin version 1.2.3 Index]