Description Usage Arguments Details Value Author(s) References See Also Examples

Computes off-transect (also called 'perpendicular') distances from measures of sighting distance and sighting angle.

1 |

`sightDist` |
Character, name of column in |

`sightAngle` |
Character, name of column in |

`data` |
data.frame object containing sighting distance and sighting angle. |

If observers recorded sighting distance and sighting angle (as is often common in line transect surveys), use this function to convert
to off-transect distances, the required input data for `F.dfunc.estim`

.

A vector of off-transect (or perpendicular) distances. Units are the same as `sightDist`

.

Jason Carlisle, University of Wyoming and WEST Inc., jcarlisle@west-inc.com

Buckland, S.T., Anderson, D.R., Burnham, K.P. and Laake, J.L. 1993.
*Distance Sampling: Estimating Abundance of Biological Populations*. Chapman and Hall, London.

1 2 3 4 5 | ```
# Load the example dataset of sparrow detections from package
data(sparrowDetectionData)
# Compute perpendicular, off-transect distances from the observer's sight distance and angle
sparrowDetectionData$perpDist <- perpDists(sightDist="sightdist", sightAngle="sightangle",
data=sparrowDetectionData)
``` |

```
Rdistance (version 2.1.3)
```

Embedding an R snippet on your website

Add the following code to your website.

For more information on customizing the embed code, read Embedding Snippets.