# Determine sequence of ULS zones.

### Description

`uls.zones`

determines the unique zones obtained by implementing the ULS (Upper Level Set) method of Patil and Taillie (2004).

### Usage

1 | ```
uls.zones(cases, pop, w, ubpop = 0.5)
``` |

### Arguments

`cases` |
The number of cases in each region. |

`pop` |
The population size of each region. |

`w` |
The binary spatial adjacency matrix. |

`ubpop` |
The upperbound of the proportion of the total population to consider for a cluster. |

### Details

The zones returned must have a total population less than ubpop * the total population of all regions in the study area.

### Value

Returns a list of zones to consider for clustering. Each element of the list contains a vector with the location ids of the regions in that zone.

### Author(s)

Joshua French

### References

Patil, G. P., and Taillie, C. (2004). Upper level set scan statistic for detecting arbitrarily shaped hotspots. Environmental and Ecological Statistics, 11(2), 183-197.

### Examples

1 2 3 |

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