spDates: Analysis of Spatial Gradients in Radiocarbon Dates

Inspired by space-time regressions often performed to assess the expansion of the Neolithic from the Near East to Europe (Pinhasi et al. 2005 <doi:10.1371/journal.pbio.0030410>). Test for significant correlations between the (earliest) radiocarbon dates of archaeological sites and their respective distances from a hypothetical center of origin. Distances can be either great-circle or least-cost paths calculated from a friction surface. Both ordinary least squares (OLS) and reduced major axis (RMA) methods are supported (Russell et al. 2014 <doi:10.1371/journal.pone.0087854>). It is also possible to iterate over many sites to identify the most likely origin.

Version:	1.0
Depends:	R (≥ 3.5.0), rcarbon
Imports:	data.table, dplyr, gdistance, ggplot2, parallel, raster, smatr, viridisLite, magrittr, rlang, sp, gstat
Published:	2020-10-08
Author:	Jonas Gregorio de Souza [aut, cre]
Maintainer:	Jonas Gregorio de Souza <jonas.gregorio at gmail.com>
License:	MIT + file LICENSE
NeedsCompilation:	no
Materials:	README
CRAN checks:	spDates results

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