echin2 {aster} | R Documentation |

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

data(echin2)

A data frame with records for 557 plants observed over five years. Data are already in “long” format; no need to reshape.

- resp
Response vector.

- varb
Categorical. Gives node of graphical model corresponding to each component of

`resp`

. See details below.- root
All ones. Root variables for graphical model.

- id
Categorical. Indicates individual plants.

- flat
Categorical. Position in growth chamber.

- row
Categorical. Row in the field.

- posi
Numerical. Position within row in the field.

- crosstype
Categorical. See details.

- yearcross
Categorical. Year in which cross was done.

The levels of `varb`

indicate nodes of the graphical model to which
the corresponding elements of the response vector `resp`

belong.
This is the typical “long” format produced by the R `reshape`

function. For each individual, there are several response variables.
All response variables are combined in one vector `resp`

.
The variable `varb`

indicates which “original” variable
the number was for. The variable `id`

indicates which individual
the number was for. The levels of `varb`

, which are the names
of the “original” variables are

- lds1
Survival for the first month in the growth chamber.

- lds2
Ditto for 2nd month in the growth chamber.

- lds3
Ditto for 3rd month in the growth chamber.

- ld01
Survival for first year in the field.

- ld02
Ditto for 2nd year in the field.

- ld03
Ditto for 3rd year in the field.

- ld04
Ditto for 4th year in the field.

- ld05
Ditto for 5th year in the field.

- roct2003
Rosette count, measure of size and vigor, recorded for 3rd year in the field.

- roct2004
Ditto for 4th year in the field.

- roct2005
Ditto for 5th year in the field.

These data are complicated by the experiment being done in two parts.
Plants start their life indoors in a growth chamber. The predictor
variable `flat`

only makes sense during this time in which three
response variables `lds1`

, `lds2`

, and `lds3`

are observed.
After three months in the growth chamber, the plants (if they
survived, i. e., if `lds3 == 1`

) were planted in an experimental
field plot outdoors. The variables `row`

and `posi`

only make
sense during this time in which all of the rest of the response variables
are observed. Because of certain predictor variables only making sense
with respect to certain components of the response vector, the R formula
mini-language is unable to cope, and model matrices must be constructed
"by hand".

*Echinacea angustifolia* is native to North American tallgrass prairie,
which was once extensive but now exists only in isolated remnants.
To evaluate the effects of different mating regimes on the fitness of
resulting progeny, crosses were conducted to produce progeny of (a) mates
from different remnants, (b) mates chosen at random from the same remnant,
and (c) mates known to share maternal parent. These three categories are
the three levels of `crosstype`

.

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

These data are analyzed in the following.

Shaw, R. G., Geyer, C. J., Wagenius, S., Hangelbroek, H. H.,
and Etterson, J. R. (2008)
Unifying life history analyses for inference of fitness and population growth.
*American Naturalist*, **172**, E35-E47.
doi: 10.1086/588063.

data(echin2)

[Package *aster* version 1.1-2 Index]