
426 Spatial Point Patterns: Methodology and Applications with R
The horizontal axis is the covariate value, and the vertical axis is effectively the loga rithm of the
intensity. The dot-dash line shows the fitted relationship, which is a straight line on this scale.
The solid line is the smoothe d partial residual, which is roughly speaking an estimate of the true
relationship. The grey shading indicates a pointwise 95% confidence interval fo r the estimated true
relationship.
0.00 0.10 0.20
−0.5 0.0 0.5 1.0
grad
h
^
(grad)
0.00 0.10 0.20
−0.5 0.0 0.5 1.0 1.5
grad
h
^
(grad)
Figure 11.11. Partial residual plots for the terrain slope covariate, for models wher