Converts the Steiner tree to smooth paths

## Arguments

- g
Steiner tree computed with tnss_tree

- bw
bandwidth of Gaussian Kernel

- n
number of extra nodes to include per edge

## Details

see see online for tips on plotting the result

## Examples

```
xy <- cbind(state.center$x, state.center$y)[!state.name %in% c("Alaska", "Hawaii"), ]
xy_dummy <- tnss_dummies(xy, root = 4)
gtree <- tnss_tree(cali2010, xy, xy_dummy, root = 4, gamma = 0.9)
tree_smooth <- tnss_smooth(gtree, bw = 10, n = 10)
```