
Point Patterns on a Linear Network 719
"linfun" and "linim" have an argument style which determines the plotting style. The figure
was produced by
> plot(dna, style="colour", ribside="left", box=FALSE)
> plot(dna, style="width", adjust=2.5)
Figure 17.5. Distance to the nearest recorded assault in the Chicago crimes data by the shortest
street path, plotted using greyscale (Left) and using line thickness (Right). Scale markings are
distances in feet.
17.4 Intensity
A point pattern x on a linear network L will be treated as a realisation of a point process X on L.
This concept does not require any new te c hnical definitio ns. In