View source: R/calcTopologicalIndices.r

calc_topological_indices | R Documentation |

`NetIndices::TrophInd()`

Calculate topological indices for ecological networks. The mean trophic level
and Omnivory and the Level of omnivory are calculated with the function `NetIndices::TrophInd()`

```
calc_topological_indices(ig, ncores = 0)
```

`ig` |
vector of igraph objects |

`ncores` |
number of cores used to compute in parallel, if 0 sequential processing is used. |

a data.frame with the following fields:

Network: Name of the network if the list have names

Size: Number of species

Top: Number of top predator species

Basal: Number of basal especies

Omnivory: Proportion of omnivorous species

Links: number of interactions

LD: linkage density

Connectance: directed Connectance

PathLength: average path length

Clustering: clustering coeficient

Cannib: number of cannibalistic species

TLmean: mean trophic level

TLmax: maximum trophic level

LOmnivory: Level of omnivory, quantiﬁes mean of the variety in trophic levels of the preys of a consumer

Components: number of weakly connected components

Vulnerability: mean of number of consumers per prey

VulSD: the standard deviation of normalized Vulnerability

Generality: mean number of prey per consumer

GenSD: the standard deviation of normalized Generality

```
calc_topological_indices(netData)
# Generate a test network
g <- graph_from_literal( 1 -+ 4 -+ 7,2 -+ 5 -+7, 3-+6-+7, 7-+7, 4+-3, simplify = FALSE)
calc_topological_indices(g)
```

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