# Compute Warping Path Area

### Description

Compute the area between the warping function and the diagonal (no-warping) path, in unit steps.

### Usage

1 | ```
warpArea(d)
``` |

### Arguments

`d` |
an object of class |

### Details

Above- and below- diagonal unit areas all count *plus* one (they
do not cancel with each other). The "diagonal" goes from one corner to
the other of the possibly rectangular cost matrix, therefore having a
slope of `M/N`

, not 1, as in `slantedBandWindow`

.

The computation is approximate: points having multiple correspondences are averaged, and points without a match are interpolated. Therefore, the area can be fractionary.

### Value

The area, not normalized by path length or else.

### Note

There could be alternative definitions to the area, including considering the envelope of the path.

### Author(s)

Toni Giorgino

### Examples

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