pneumo

0th

Percentile

Pneumoconiosis in Coalminers Data

The pneumo data frame has 8 rows and 4 columns. Exposure time is explanatory, and there are 3 ordinal response variables.

Keywords
datasets
Usage
data(pneumo)
Details

These were collected from coalface workers. In the original data set, the two most severe categories were combined.

Format

This data frame contains the following columns:

exposure.time

a numeric vector, in years

normal

a numeric vector, counts

mild

a numeric vector, counts

severe

a numeric vector, counts

References

McCullagh, P. and Nelder, J. A. (1989) Generalized Linear Models, 2nd ed. London: Chapman & Hall.

See Also

cumulative.

Aliases
  • pneumo
Examples
# NOT RUN {
# Fit the proportional odds model, p.179, in McCullagh and Nelder (1989)
pneumo <- transform(pneumo, let = log(exposure.time))
vglm(cbind(normal, mild, severe) ~ let, propodds, data = pneumo)
# }
Documentation reproduced from package VGAM, version 1.0-4, License: GPL-3

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