Williams.litters

<p>The data is arranged as a list of grouped counts where the grouping is by dose where dose is included both as a variate (vdose) and as a factor (fdose).</p>

datasets

Modeling under- and over-dispersed count data using extended Poisson process models as in the article Faddy and Smith (2011) <doi:10.18637/jss.v069.i06> .

David Smith

CountsEPPM

Mean and Variance Modeling of Count Data

Williams.litters function

<p>The format is:
List of 3
 $ vdose          : num [1:4] 0 0.75 1.5 3
 $ fdose          : Factor w/ 4 levels "0","0.75","1.5",..: 1 2 3 4
 $ number.implants:List of 4
  ..$ : num [1:18] 0 0 0 0 0 0 0 0 0 2 ...
  ..$ : num [1:20] 0 0 0 0 0 0 0 1 0 1 ...
  ..$ : num [1:17] 0 0 0 0 0 0 0 1 1 2 ...
  ..$ : num [1:17] 0 0 0 0 0 0 0 0 0 3 ...</p>

Williams.litters: Number of trials (implantations) of data of Williams (1996).

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