plotESDA {pedometrics} | R Documentation |
This function creates four plots for exploratory spatial data analysis (ESDA): histogram + density plot, bubble plot, variogram plot, and variogram map.
plotESDA(z, lat, lon, lags, cutoff, width = c(cutoff/20))
z |
Vector of numeric values of the variable for with ESDA plots should be created. |
lat |
Vector of numeric values containing the y coordinate (latitude)
of the point locations where the |
lon |
Vector of numeric values containing the x coordinate (longitude)
of the point locations where the |
lags |
Numerical vector; upper boundaries of lag-distance classes. See
argument |
cutoff |
Integer value defining the spatial separation distance up to which point pairs are included in semi-variance estimates. Defaults to the length of the diagonal of the box spanning the data divided by three. |
width |
Integer value specifying the width of subsequent distance
intervals into which data point pairs are grouped for semi-variance
estimates. Defaults to |
The user should visit the help pages of variogram
,
plotHD
, bubble
and
spplot
to obtain more details about the main functions
used to built plotESDA
.
Four plots: histogram and density plot, bubble plot, empirical variogram, and variogram map.
Alessandro Samuel-Rosa alessandrosamuelrosa@gmail.com
Cressie, N.A.C. (1993) Statistics for Spatial Data. New York: John Wiley \& Sons, p.900, 1993.
Pebesma, E.J. (2004) Multivariable geostatistics in S: the gstat package. Computers \& Geosciences, 30:683-691, 2004.
Webster, R. \& Oliver, M.A. Geostatistics for environmental scientists. Chichester: John Wiley \& Sons, p.315, 2007.
variogram
, plotHD
,
bubble
, spplot
.
# require(gstat) # data(meuse) # plotESDA(z = meuse$zinc, lat = meuse$y, lon = meuse$x)