removeEdge {graph} | R Documentation

## removeEdge

### Description

A function to remove the specified edges from a graph.

### Usage

    removeEdge(from, to, graph)

### Arguments

`from` | from edge labels
`to` | to edge labels
`graph` | a `graph` object

### Details

A new graph instance is returned with the edges specified by corresponding elements of the `from` and `to` vectors removed. If `from` and `to` are not the same length, one of them should have length one. All edges to be removed must exist in `graph`.

### Value

A new instance of a graph with the same class as `graph` is returned with the specified edges removed.

### Author(s)

R. Gentleman

### See Also

`addNode`,`addEdge`,`removeNode`

### Examples

      V <- LETTERS[1:4]
      edL1 <- vector("list", length=4)
      names(edL1) <- V
      for(i in 1:4)
        edL1[[i]] <- list(edges=c(2,1,4,3)[i], weights=sqrt(i))
      gR <- graphNEL(nodes=V, edgeL=edL1)

      gX <- removeEdge("A", "B", gR)

      set.seed(123)
      g <- randomEGraph(V=letters[1:5],edges=5)
      g2 <- removeEdge(from=c("a","b"), to=c("c","e"), g)

[Package graph version 1.72.0 Index]