vis_concurvity {dsm} | R Documentation |

## Visualise concurvity between terms in a GAM

### Description

Plot measures of how much one term in the model could be explained by another. When values are high, one should consider re-running variable selection with one of the offending variables removed to check for stability in term selection.

### Usage

```
vis_concurvity(model, type = "estimate")
```

### Arguments

`model` |
fitted model |

`type` |
concurvity measure to plot, see |

### Details

These methods are considered somewhat experimental at this time. Consult
`concurvity`

for more information on how concurvity
measures are calculated.

### Author(s)

David L Miller

### Examples

```
## Not run:
library(Distance)
library(dsm)
# load the Gulf of Mexico dolphin data (see ?mexdolphins)
data(mexdolphins)
# fit a detection function and look at the summary
hr.model <- ds(distdata, truncation=6000,
key = "hr", adjustment = NULL)
# fit a simple smooth of x and y to counts
mod1 <- dsm(count~s(x,y)+s(depth), hr.model, segdata, obsdata)
# visualise concurvity using the "estimate" metric
vis_concurvity(mod1)
## End(Not run)
```

[Package

*dsm*version 2.3.3 Index]