echinacea {aster2} | R Documentation |

## Life History Data on Echinacea angustifolia

### Description

Data on life history traits for the purple coneflower
*Echinacea angustifolia*

### Usage

`data(echinacea)`

### Format

An object of class `"asterdata"`

(see `asterdata`

)
comprising records for 570 plants observed over three years.
Nodes of the graph for one individual are associated with the variables
(levels of the factor `echinacea$redata$varb`

)

- ld02
Indicator of being alive in 2002. Bernoulli, predecessor the constant one.

- ld03
Ditto for 2003. Bernoulli, predecessor

`ld02`

.- ld04
Ditto for 2004. Bernoulli, predecessor

`ld03`

.- fl02
Indicator of flowering 2002. Bernoulli, predecessor

`ld02`

.- fl03
Ditto for 2003. Bernoulli, predecessor

`ld03`

.- fl04
Ditto for 2004. Bernoulli, predecessor

`ld04`

.- hdct02
Count of number of flower heads in 2002. Zero-truncated Poisson, predecessor

`fl02`

.- hdct03
Ditto for 2003. Zero-truncated Poisson, predecessor

`fl03`

.- hdct04
Ditto for 2004. Zero-truncated Poisson, predecessor

`fl04`

.

Covariates are

- pop
the remnant population of origin of the plant (all plants were grown together,

`pop`

encodes ancestry).- ewloc
east-west location in plot.

- nsloc
north-south location in plot.

### Details

This is the data for the example in Geyer, Wagenius, and Shaw (2007).
These data were included in the R package `aster`

which was the
predecessor of this package as the dataset `echinacea`

.

### Source

Stuart Wagenius, http://www.chicagobotanic.org/research/staff/wagenius

### References

Geyer, C. J., Wagenius, S., and Shaw, R. G. (2007)
Aster Models for Life History Analysis.
*Biometrika* **94** 415–426.

### Examples

```
data(echinacea)
names(echinacea)
names(echinacea$redata)
levels(echinacea$redata$varb)
```

*aster2*version 0.3 Index]