# Trapping-Time

### Description

Extract vertical lines from a recurrence plot on which it calculates laminarity (the percentage of recurrence points which form vertical lines), and trapping-time (the mean length of vertical lines).

### Usage

1 | ```
tt(x, minvertline, whiteline)
``` |

### Arguments

`x` |
A binary matrix representing a recurrent plot |

`minvertline` |
A minimum vertical length of recurrent points. |

`whiteline` |
A logical flag to calculate (TRUE) or not (FALSE) empty vertical lines |

### Details

This function is based on MATLAB code
written by Norbert Marwan, available in `crptoolbox`

### Value

A list with four variables: TT (The average length of vertical line structures), lam (proportion of recurrent points forming vertical line structures), tw (vertically consecutive white points|lines) and tb (vertically consecutive black points|lines). If whiteline = FALSE, tw = NA.

### Author(s)

Moreno I. Coco (moreno.cocoi@gmail.com)

### Examples

1 2 3 4 5 6 7 |