ThreeWay (version 1.1.3)

meaudret: Meaudret data

Description

Three-way data about six sampling sites along a small French stream (the Meaudret) on which ten biological and chemical variables are collected four times.

Usage

data(meaudret)

Format

An array of order 6 x 10 x 4. The A-mode entities are sampling sites (Site1, ..., Site6). The B-mode entities are biological and chemical variables (Temp, Debi, PH, Cond, Oxyg, Biod, Chem, NH4, NO3, PO4). The C-mode entities are months (June, August, November, February).

Details

The ranges of the variables are very different and, therefore, normalization of the raw data is recommended. The data have been used by Kiers (1991) in order to show the existing relations among three-way methods.

References

H.A.L. Kiers (1991). Hierarchical relations among three-way methods. Psychometrika 56:449--470.

Examples

data(meaudret)
## The labels are in the data array
laba <- dimnames(meaudret)[[1]]
labb <- dimnames(meaudret)[[2]]
labc <- dimnames(meaudret)[[3]]
## Candecomp/Parafac analysis
## Not run: 
# CP(meaudret,laba,labb,labc)
# ## Tucker3 analysis
# T3(meaudret,laba,labb,labc)
# ## Tucker2 analysis
# T2(meaudret,laba,labb,labc)
# ## Tucker1 analysis
# T1(meaudret,laba,labb,labc)
# ## End(Not run)