crossmatchdist {crossmatch} R Documentation

## The Exact Null Distribution Of The Cross-match Statistic Under The Null

### Description

The exact null distribution of the number of crossmatches for `bigN>=4` cases, `n>=2` from one type and `N-n>=2` from another type.

### Usage

```crossmatchdist(bigN, n)
```

### Arguments

 `bigN` The total number of observations `n` The number of cases from one type

### Details

`bigN` is even. Let a1 be the number of cross-matches pairs. Then `a2=(n-a1)/2` and `a0=bigN/2-(n+a1)/2` are the number of pairs both of one type and the other type respectively.

### Value

 `dist ` A matrix with rows `a0, a1, a2, Pr(A1=a1)` and `Pr(A1<=a1)`.

Ruth Heller

### References

Rosenbaum, P.R. (2005), An exact distribution-free test comparing two multivariate distributions based on adjacency, Journal of the Royal Statistical Society: Series B (Statistical Methodology), 67, 4, 515-530.

### Examples

```crossmatchdist(18,9)
```

[Package crossmatch version 1.3-1 Index]