fitFDist {limma} | R Documentation |

## Moment Estimation of Scaled F-Distribution

### Description

Moment estimation of the parameters of a scaled F-distribution given one of the degrees of freedom.
This function is called internally by `ebayes`

and is not usually called directly by a user.

### Usage

fitFDist(x,df1)

### Arguments

`x` |
numeric vector or array of positive values representing a sample from an F-distribution. |

`df1` |
the first degrees of freedom of the F-distribution. May be an integer or a vector of the same length as `x` . |

### Details

The function estimates `scale`

and `df2`

under the assumption that `x`

is distributed as `scale`

times an F-distributed random variable on `df1`

and `df2`

degrees of freedom.

### Value

A list containing the components

`scale` |
scale factor for F-distribution |

`df2` |
the second degrees of freedom of the F-distribution |

### Author(s)

Gordon Smyth

### See Also

`ebayes`

, `trigammaInverse`

[Package

*limma* version 2.4.7

Index]