Correlogram
Calculates and plots a correlogram
correlogram(x, v, dist = 5000, dmatrix = FALSE, ns = 99, latlong = FALSE, ...)
x |
SpatialPointsDataFrame object |
v |
Test variable in x@data |
dist |
Distance of correlation lags, if latlong=TRUE units are in kilometers |
dmatrix |
Should the distance matrix be include in output (TRUE/FALSE) |
ns |
Number of simulations to derive simulation envelope |
latlong |
Coordinates are in latlong (TRUE/FALSE) |
... |
Arguments passed to cor ('pearson', 'kendall' or 'spearman') |
A list object containing:
autocorrelation is a data.frame object with the following components
autocorrelation - Autocorrelation value for each distance lag
dist - Value of distance lag
lci - Lower confidence interval (p=0.025)
uci - Upper confidence interval (p=0.975)
CorrPlot recordedplot object to recall plot
dmatrix Distance matrix (if dmatrix=TRUE)
Jeffrey S. Evans jeffrey_evans@tnc.org
library(sp) data(meuse) coordinates(meuse) = ~x+y zinc.cg <- correlogram(x = meuse, v = meuse@data[,'zinc'], dist = 250, ns = 9)
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