# Plot log-ratios vs log-ratios for all pairs of columns

### Description

Plot log-ratios vs log-ratios for all pairs of columns.

### Usage

1 2 3 |

### Arguments

`X` |
Nx2K |

`xlab,ylab` |
Labels on the x and y axes. |

`xlim,ylim` |
Plot range on the x and y axes. |

`pch` |
Plot symbol used. |

`...` |
Additional arguments accepted by |

`add` |
If |

### Details

Log-ratio are calculated by over paired columns, e.g. column 1 and 2, column 3 and 4, and so on.

### Value

Returns nothing.

### Author(s)

Henrik Bengtsson