# minimum lifespan

### Description

Gives a `vector`

of minimum lifespans for each individual.

### Usage

1 | ```
Lifespan(ch)
``` |

### Arguments

`ch` |
input a matrix or a single-columned data.frame of capture histories. It will return a vector of minimum lifespans for each row |

### Details

This function computes the mimimum lifespans given a capture history. This is computed as the first day seen subtracted by the last day seen. For example, an individual with the capture history of "1001" would have a minimum lifespan of 3; "1110" = 2; "1010" = 2, "01000001" = 6 etc. See examples.

### Value

`vector` |
A numerical vector of lifespans |

### Author(s)

John Waller

### Examples

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 | ```
#' set up variables to be used by Simulate.CH for ten individuals
N = 10
x1 = rnorm(N) #' each trait is normally distributed
#' Run Simulate.CH with a constant recapture probability
chObj = Simulate.CH(surv.form = 1 + 0.15*x1, p.constant = 1, N = N)
attributes(chObj) #' see what is inside our object
ch_matrix = chObj$ch_split #' grab our matrix from the list
ch_matrix #' lets look at it
ch_df = chObj$ch #' lets grab a data.frame also
ch_df
#' we can compute the minimum lifespan on either a matrix or a data.frame as input
Lifespan(ch_matrix) #' on a matrix
Lifespan(ch_df) #' on a data.frame
``` |

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