Description Usage Format Details
An artificial dataset containing information on flu, body weight and DNA methylation at an immune system gene locus, as well as demographic variables.
| 1 | data("flu_weight")
 | 
A data frame with 200 observations on the following 7 variables.
DNAmetha numeric vector: DNA methylation fraction (ranging 0-1) at an immune system gene locus
FluNowa numeric vector: Presence of severe flu at the moment of sample collection
FluChilda numeric vector: History of recurrent flu during childhood
Gendera character vector: Pair's gender
Agea numeric vector: Pair's age
Weighta numeric vector: Body weight in kilograms
PairNuma numeric vector: Randomly assigned pair number
As observed from this dataset, the individuals of the sample are sorted following two criteria: 1) twin pairs are put together (adjacent rows), and 2) all twins are discordant for present flu (FluNow). 
The second condition is necessary only when using the log_dif function. 
It is recommended pre-sorting all datasets used along with this R package following criterion "1" or criteria "1" and "2".
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