histomap {GeoXp}R Documentation

Interactive Histogram and map

Description

The function `histomap' draws a histogram of the given variable $var$ and a map with sites of coordinates $(long,lat)$. Each site is associated to a value of $var$ and there is interactivity between the two windows.

Usage

histomap(long, lat, var, nbcol = 10, listvar = NULL, 
         listnomvar = NULL, criteria = NULL, carte = NULL, label = "", 
         symbol = 0, color = 1, labvar = "", axis = FALSE, 
         lablong = "", lablat = "")

Arguments

long a vector $x$ of size $n$
lat a vector $y$ of size $n$
var a vector of numeric values of size $n$
nbcol number of cells for histogram (10 by default)
listvar matrix of variables
listnomvar names of variables $listvar$
criteria a vector of size $n$ of boolean with TRUE on specific sites (these for non interactive selection)
carte matrix with 2 columns for drawing spatial polygonal contours : $x$ and $y$ coordinates of the vertices of the polygon
label vector of character of size $n$ with names of sites
color 0 or 1 (by default), choice of representation of selected points (if user has selected a barplot as an additionnal graph). If 0, sites are represented in blue, if 1, sites are represented with different colors for each factor
symbol 0 (by default) or 1, choice of representation of selected points. If 0, selected points are circles, if 1, selected points are stars
labvar name of variable $var$
axis a boolean with TRUE for drawing axes on the map
lablong name of the x-axis that will be printed on the map
lablat name of the y-axis that will be printed on the map

Details

Sites selected by a bar on the histogram are represented on the map in red and the values of sites selected on the map by `points' or `polygon' are represented in red as a sub-histogram on the histogram.

Value

A vector of boolean of size $n$. TRUE if the site was in the last selection.

Author(s)

Thomas-Agnan C., Aragon Y., Ruiz-Gazen A., Laurent T., Robidou L.

References

Aragon Yves, Perrin Olivier, Ruiz-Gazen Anne, Thomas-Agnan Christine (2006), ``Statistique et Econométrie pour données géoréférencées : modèles et études de cas''

See Also

histomap, histobarmap, scattermap, densitymap

Examples

# data oldcol
data(oldcol)
data(oldcol.polys)
contours.OLD<-polylist2list(oldcol.polys)
histomap(oldcol$X,oldcol$Y,oldcol$CRIME,listvar=oldcol, 
listnomvar=names(oldcol),criteria=(oldcol$CRIME>mean(oldcol$CRIME)),
carte=contours.OLD)

# data afcon
data(afcon)
histomap(afcon$x,afcon$y,afcon$totcon,listvar=afcon,
listnomvar=names(afcon),criteria=(afcon$totcon>mean(afcon$totcon)),
label=afcon$name)

# data eire
data(eire)
data(eire.polys)
eire.contours<-polylist2list(eire.polys)
histomap(eire$V1,eire$V2,eire$A,carte=eire.contours,listvar=eire,
listnomvar=names(eire),labvar="Taux d'individus au groupe sanguin A")

[Package GeoXp version 1.0 Index]