getrsq {BinaryDosage} | R Documentation |

## Calculate imputation r squared

### Description

Routine to calculate the imputation r squared given the dosages and Pr(g=2). This is an estimate for the imputation r squared returned from minimac and impute2. The r squared values are calculated slightly differently between the programs. This estimate is based on the method used by minimac. It does well for minor allele frequencies above 5%. This function is used internally and is exported for use in examples.

### Usage

```
getrsq(dosage, p0, p1, p2)
```

### Arguments

`dosage` |
Dosage values |

`p0` |
Pr(g=0) - unused |

`p1` |
Pr(g=1) - unused |

`p2` |
Pr(g=2) |

### Value

Imputation r squared

### Examples

```
# Get information about binary dosage file
bdfile <- system.file("extdata", "vcf1a.bdose", package = "BinaryDosage")
bdinfo <- getbdinfo(bdfiles = bdfile)
snp1 <- getsnp(bdinfo = bdinfo, 1, dosageonly = FALSE)
rsq <- BinaryDosage:::getrsq(snp1$dosage, p2 = snp1$p2)
```

[Package

*BinaryDosage*version 1.0.0 Index]