The function moranplotmap() draws a moran plot, used to detect spatial autocorrelation in the variable var. On the x-axis, is represented x-bar(x) and on the y-axis W(x-bar(x)), where W is the spatial weight matrix. It also calcultes Moran's I statistic (see nonnormoran) and give a p-value associated to the autocorrelation test (gaussian version and permutation version).
selectstat
(Package: GeoXp) :
Selection of values on a graphic
The function selectstat() is used to select sites on a graphic such as Histogram, Barplot, Boxplot, Polyboxplot, Scatterplot, Densityplot, Neighbourplot, Lorentz, Moran, Angleplot, Variocloud, Cluster, or PCA. Most of the GeoXp functions call selectstat.r.
The function carte() draws a map with sites of coordinates (long,lat) and represents sites which have been selected in obs. This function is called by most of the functions of GeoXp (this is not an interactive function).
● Data Source:
CranContrib
● Keywords: spatial, utilities
● Alias: carte
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misolationmap
(Package: GeoXp) :
Interactive multivariate isolation plot and map
The function misolationmap draws a scatterplot with the pairwise Mahalanobis distances calculated using variables names.var between the observations and their neighbors on the y-axis and the "degree of isolation" of the observations on the x-axis and a map
scattermap
(Package: GeoXp) :
Interactive scatterplot and map
The function scattermap draws a scatterplot of the given variables indicated in names.var and a map with sites of coordinates coordinates(sp.obj). Boxplots of each variable names.var[1] and names.var[2] are represented below the x-axis and y-axis.
histnbmap
(Package: GeoXp) :
Interactive histogram of the distances between two neighbors of a nb object and map
The function histnbmap() draws the histogram of the distances between two neighbors for a neighbourhood structure given by a nb object and calculated by nbdists function (see spdep package), and links the graphic with a map.
The function dbledensitymap plots two kernel density estimates from 2 variables included in names.var computed with bkde, and a map with sites of coordinates coordinates(sp.obj). Each site is associated to a value of names.var[1] and names.var[2] and the two windows are interactive.
GeoXp is a tool for researchers in spatial statistics, spatial econometrics, geography, ecology etc allowing to link dynamically statistical plots with elementary maps. This coupling consists in the fact that the selection of a zone on the map results in the automatic highlighting of the corresponding points on the statistical graph or reversely, the selection of a portion of the graph results in the automatic highlighting of the corresponding points on the map. GeoXp includes tools from different areas of spatial statistics including geostatistics as well as spatial econometrics and point processes. Besides elementary plots like boxplots, histograms or simple scatterplos, GeoXp also couples with maps Moran scatterplots, variogram cloud, Lorentz Curves,... In order to make the most of the multidimensionality of the data, GeoXp includes some dimension reduction techniques such as PCA.
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