appleshoots: appleshoots data set

In thomas-fung/izipr: Interpretable Zero-Inflated Poisson Models in R

Description

This data set gives the root counts for propagated columnar apple shootrs, in which the shoots were cultured on different concentrations of the cytokinin BAP, in growth cabinets with an 8 or 16 hour photoperiod. The appleshoots data has 270 observations.

Usage

data(appleshoots)

Format

A data frame with 270 observations on 4 variables.

roots

number of roots per shoot

trtn

number of shoots per treatment combination

photo

photoperiod, 8 or 16

bap

BAP concentration, numeric

Source

The agridat package

References

Wright, K. (2021). agridat: Agricultural Datasets. R package version 1.18. https://CRAN.R-project.org/package=agridat

Ridout, M. S., Hinde, J. P., and Demetrio, C. G. B. (1998). Models for Count Data with Many Zeros. Proceedings of the 19th International Biometric Conference, 179-192.

SAS. Fitting Zero-Inflated Count Data Models by Using PROC GENMOD. support.sas.com/rnd/app/examples/stat/GENMODZIP/roots.pdf

Examples

## For examples see example(glm.izip)

thomas-fung/izipr documentation built on Dec. 23, 2021, 9:57 a.m.