Contains functions for mapping odds ratios or other effect estimates using individual-level data such as case-control study data, using generalized additive models (GAMs) for smoothing with a two-dimensional predictor (e.g., geolocation or exposure to chemical mixtures) while adjusting for confounding variables, using methods described by Kelsall and Diggle (1998) and Webster at al. (2006). Includes convenient functions for mapping, efficient control sampling, and permutation tests for the null hypothesis that the two-dimensional predictor is not associated with the outcome variable (adjusting for confounders).
A map of the outline of MA in SpatialPolygonsDataFrame format, converted from an ESRI shapefile using the readShapePoly function in the maptools package.
90 cases and 910 controls with random smoking covarate values and random geolocations within Massachusetts, geocoded on a Lambert projection (in meters). MAmap is a map of Massachusetts using the same projection.
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