# Sum the distance of all branches in a dendrogram

### Description

This function takes a dendrogram class object as an input, and adds up all the distances of branches. This function is called recursively to adds up the sum. In case of exponential mapping for the quantitative mode, the sum is in the exponential scale

### Usage

1 2 | ```
sum_distance(d, sum = 0, mapping = c("exponential", "linear"), scale = 0,
max_height = 0, ...)
``` |

### Arguments

`d` |
dendrogram class object |

`sum` |
the sum of distance |

`mapping` |
in case of quantitative mode, either "linear" or "exponential" mapping |

`...` |
ignored |

### Value

the sum of distances

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