informativeArrayProb {binGroup2} R Documentation

## Arrange a matrix of probabilities for informative array testing

### Description

Arrange a vector of individual risk probabilities in a matrix for informative array testing without master pooling.

### Usage

```informativeArrayProb(prob.vec, nr, nc, method = "sd")
```

### Arguments

 `prob.vec` vector of individual risk probabilities, of length nr * nc. `nr` number of rows in the array. `nc` number of columns in the array. `method` character string defining the method to be used for matrix arrangement. Options include spiral ("sd") and gradient ("gd") arrangement. See McMahan et al. (2012) for additional details.

### Value

A matrix of probabilities arranged according to the specified method.

### Author(s)

This function was originally written by Christopher McMahan for McMahan et al. (2012). The function was obtained from http://chrisbilder.com/grouptesting/.

### References

McMahan, C., Tebbs, J., Bilder, C. (2012b). “Two-Dimensional Informative Array Testing.” Biometrics, 68, 793–804. doi: 10.1111/j.1541-0420.2011.01726.x, https://doi.org/10.1111/j.1541-0420.2011.01726.x.

`expectOrderBeta` for generating a vector of individual risk probabilities.

### Examples

```# Use the gradient arrangement method to create a matrix
#   of individual risk probabilities for a 10x10 array.
# Depending on the specified probability, alpha level,
#   and overall group size, simulation may be necessary
#   in order to generate the vector of individual
#   probabilities. This is done using the expectOrderBeta()
#   function and requires the user to set a seed in order
#   to reproduce results.
set.seed(1107)
p.vec1 <- expectOrderBeta(p = 0.05, alpha = 2, size = 100)
informativeArrayProb(prob.vec = p.vec1, nr = 10, nc = 10,
method = "gd")

# Use the spiral arrangement method to create a matrix
#   of individual risk probabilities for a 5x5 array.
set.seed(8791)
p.vec2 <- expectOrderBeta(p = 0.02, alpha = 0.5, size = 25)
informativeArrayProb(prob.vec = p.vec2, nr = 5, nc = 5,
method = "sd")
```

[Package binGroup2 version 1.1.0 Index]