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July 13, 2017 15:55
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legpos <- function(pos, x1, x2, y1, y2, delta1, delta2, legend_xsize, legend_ysize){ | |
# Position | |
if (pos == "bottomleft") { | |
xref <- x1 + delta1 | |
yref <- y1 + delta1 | |
} | |
if (pos == "topleft") { | |
xref <- x1 + delta1 | |
yref <- y2 - 2 * delta1 - legend_ysize | |
} | |
if (pos == "topright") { | |
xref <- x2 - 2 * delta1 - legend_xsize | |
yref <- y2 -2 * delta1 - legend_ysize | |
} | |
if (pos == "bottomright") { | |
xref <- x2 - 2 * delta1 - legend_xsize | |
yref <- y1 + delta1 | |
} | |
if (pos == "left") { | |
xref <- x1 + delta1 | |
yref <- (y1+y2)/2-legend_ysize/2 - delta2 | |
} | |
if (pos == "right") { | |
xref <- x2 - 2*delta1 - legend_xsize | |
yref <- (y1+y2)/2-legend_ysize/2 - delta2 | |
} | |
if (pos == "top") { | |
xref <- (x1+x2)/2 - legend_xsize/2 | |
yref <- y2 - 2*delta1 - legend_ysize | |
} | |
if (pos == "bottom") { | |
xref <- (x1+x2)/2 - legend_xsize/2 | |
yref <- y1 + delta1 | |
} | |
if (pos == "center") { | |
xref <- (x1+x2)/2 - legend_xsize/2 | |
yref <- (y1+y2)/2-legend_ysize/2 - delta2 | |
} | |
return(list(xref = xref, yref = yref)) | |
} | |
legendCirclesSymbols2 <- function(pos = "topleft", title.txt = "Title of the legend", | |
title.cex = 0.8, cex = 1, | |
values.cex = 0.6, var, inches, col = "red", | |
frame = FALSE, values.rnd = 0, style = "c"){ | |
var <- abs(var) | |
# exit for none | |
positions <- c("bottomleft", "topleft", "topright", "bottomright", | |
"left", "right", "top", "bottom", "center") | |
if(!pos %in% positions){return()} | |
# figdim in geo coordinates | |
x1 <- par()$usr[1] | |
x2 <- par()$usr[2] | |
y1 <- par()$usr[3] | |
y2 <- par()$usr[4] | |
# offsets | |
delta1 <- xinch(0.1) * cex | |
delta2 <- delta1 / 2 | |
# Create circles | |
## with unknown intermediates values OR with a list of values | |
if(length(var) == 2){ | |
siz <- sqrt((var * inches * inches * pi / max(var)) / pi) | |
siz <- seq(from = max(siz), to = min(siz), length.out = 4) | |
sle <- siz * siz * pi | |
var <- sle * max(var) / sle[1] | |
}else{ | |
siz <- sqrt((var * inches * inches * pi / max(var)) / pi) | |
} | |
size <- xinch(siz) | |
var <- round(var,values.rnd) | |
size <- sort(size, decreasing = T) | |
var <- sort(var, decreasing = T) | |
# Legend width and height | |
if(style == "c"){ | |
longVal <- var[strwidth(var,cex = values.cex) == max(strwidth(var, cex = values.cex))][1] | |
legend_xsize <- max(size[1] * 2 + strwidth(longVal, cex = values.cex), | |
strwidth(title.txt,cex = title.cex) - delta1) | |
legend_ysize <-size[1] * 2 + strheight(title.txt, cex = title.cex) | |
} | |
# Get legend position | |
legcoord <- legpos(pos = pos, x1 = x1, x2 = x2, y1 = y1, y2 = y2, | |
delta1 = delta1, delta2 = delta2, | |
legend_xsize = legend_xsize, legend_ysize = legend_ysize) | |
xref <- legcoord$xref | |
yref <- legcoord$yref | |
# Frame display | |
if(frame == TRUE){ | |
rect(xref - delta1, yref - delta1, xref + legend_xsize + delta1 * 2, | |
yref + legend_ysize + delta1 * 2, border = "black", col="white") | |
} | |
# legend display | |
if(style=="c"){ | |
for(i in 1:length(size)){ | |
symbols(x = xref + size[1], y = yref + size[i], circles = size[i], | |
add = TRUE, bg = col, inches = FALSE) | |
} | |
for(i in 1:length(var)){ | |
segments(xref + size[1], yref + size[i] * 2, xref + size[1] * 2 + delta2, | |
yref + size[i] * 2) | |
text(x = xref + size[1] * 2 + delta1, y = yref + size[i] * 2, labels = var[i], | |
adj = c(0,0.5), cex = values.cex) | |
} | |
text(x = xref ,y = yref + delta2 + size[1] * 2 + delta2, title.txt, | |
adj = c(0,0), cex = title.cex) | |
} | |
} | |
library(cartography) | |
options(scipen = 7) | |
data("nuts2006") | |
nf <- layout(matrix(c(1,1,1,2,3,4), 2, 3, byrow = TRUE),height = c(4/5,1/5)) | |
par(mar=c(0,0,0,0)) | |
plot(nuts0.spdf) | |
propSymbolsLayer(spdf = nuts0.spdf, df = nuts0.df, var = "pop2008", | |
legend.pos = "bottomleft", inches = 0.3, col = "red") | |
box() | |
# il faut d'abord plotter (invisible) la couche ayant été utilisée pour les propSymbols | |
plot(nuts0.spdf, col = NA, border = NA) | |
## Les cercles de la légendes sont choisis explicitement | |
## Le paramètre inches doit correspondre à celui utilisé dans propSymbolsLayer | |
legendCirclesSymbols2(var=c(35500,5000000,20000000,40000000,82217837), values.cex = 0.9, | |
inches = 0.3, pos = "center", col = "red", title.cex = 1.2, | |
title.txt = "Population") | |
box() | |
plot(nuts0.spdf, col = NA, border = NA) | |
legendCirclesSymbols2(var=c(5000000,20000000,82217837), values.cex = 0.9, | |
inches = 0.3, pos = "center", col = "red", title.cex = 1.2, | |
title.txt = "Population") | |
box() | |
## Les cercles de la légendes sont choisis en fonction des valeurs min et max fournies | |
plot(nuts0.spdf, col = NA, border = NA) | |
legendCirclesSymbols2(var=c(35356,82217837), | |
inches = 0.3, pos = "center", col = "red", | |
title.txt = "Population") | |
box() |
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