Data gathered between 1959 and 1960 during 49 insect trapping nights. For each trapping night, the abundance of 17 Trichoptera species is recorded as well as 6 meteorological variables which may influence the abundance of each species. Finally, the observations (that is to say, the trapping nights), have been classified into 12 groups corresponding to contiguous nights between summer 1959 and summer 1960.
trichopteraA list with 2 two data frames:
a 49 x 17 matrix of abundancies/counts (49 trapping nights and 17 trichoptera species)
a 49 x 7 data frame of covariates:
Evening Temperature in Celsius
Wind in m/s
Pressure in mm Hg
relative to evening humidity in percent
proportion of sky coverage at 9pm
Nighttime precipitation in mm
a factor of 12 levels for the definition of the consecutive night groups
In order to prepare the data for using formula in multivariate analysis (multiple outputs and inputs), use prepare_data().
We only kept a subset of the original meteorological covariates for illustration purposes.
Data from P. Usseglio-Polatera.
Usseglio-Polatera, P. and Auda, Y. (1987) Influence des facteurs météorologiques sur les résultats de piégeage lumineux. Annales de Limnologie, 23, 65–79. (code des espèces p. 76) See a data description at http://pbil.univ-lyon1.fr/R/pdf/pps034.pdf (in French)
data(trichoptera)
trichoptera <- prepare_data(trichoptera$Abundance, trichoptera$Covariate)