# lineartileindex

##### Determine Which Tile Contains Each Given Point on a Linear Network

Given a tessellation on a linear network, and a list of points on the network, determine which tile of the tessellation contains each of the given points.

##### Usage

`lineartileindex(seg, tp, Z, method = c("encode", "C", "interpreted"))`

##### Arguments

- seg,tp
Vectors of local coordinates of the query points. See Details.

- Z
A tessellation on a linear network (object of class

`"lintess"`

).- method
Internal use only.

##### Details

This low-level function is
the analogue of `tileindex`

for linear networks.
For a tessellation `Z`

on a linear network,
and a list of query points on the same network,
the function determines which tile of the tessellation
contains each query point.

Argument `Z`

should be a tessellation on a linear network
(object of class `"lintess"`

).

The vectors `seg`

and `tp`

specify the locations
of the query points, on the same network, using local coordinates:
`seg`

contains integer values specifying which
segment of the network contains each query point;
`tp`

contains numeric values between 0 and 1 specifying the
fractional position along that segment.

The result is a factor, of the same length as `seg`

and `tp`

,
indicating which tile contains each point. The levels of the factor
are the names of the tiles of `Z`

.

##### Value

A factor, of the same length as `seg`

and `tp`

,
whose levels are the names of the tiles of `Z`

.

##### See Also

`as.linfun.lintess`

to create a function whose
value is the tile index.

`cut.lpp`

for a neater way to classify
the points of a point pattern on a linear network
according to a tessellation on the network.

##### Examples

```
# NOT RUN {
Z <- lineardirichlet(runiflpp(15, simplenet))
X <- runiflpp(10, simplenet)
coX <- coords(X)
ii <- lineartileindex(coX$seg, coX$tp, Z)
# }
```

*Documentation reproduced from package spatstat, version 1.61-0, License: GPL (>= 2)*