# Plot log-ratios vs log-intensities

### Description

Plot log-ratios vs log-intensities.

### Usage

1 2 3 |

### Arguments

`X` |
Nx2 |

`Alab,Mlab` |
Labels on the x and y axes. |

`Alim,Mlim` |
Plot range on the A and M axes. |

`aspectRatio` |
Aspect ratio between |

`pch` |
Plot symbol used. |

`...` |
Additional arguments accepted by |

`add` |
If |

### Details

Red channel is assumed to be in column one and green in column two. Log-ratio are calculated taking channel one over channel two.

### Value

Returns nothing.

### Author(s)

Henrik Bengtsson