gwr.matplot <- function (x, cs1 = c(0, 1), cs2 = c(0, 1), cs3 = c(0, 1), extremes = NA,
cellcolors = NA, show.legend = FALSE, nslices = 10, xlab = "Column",
ylab = "Row", do.hex = FALSE, axes = TRUE, show.values = FALSE,
vcol = NA, vcex = 1, border = "black", na.color = NA, xrange = NULL,
color.spec = "rgb", yrev = TRUE, xat = NULL, yat = NULL,
Hinton = FALSE, ...)
{
if (is.matrix(x) || is.data.frame(x))
{
xdim <- dim(x)
if(is.vector(xrange))
{
if(xrange[1] > min(x, na.rm=TRUE) || xrange[2] < max(x, na.rm=TRUE) || length(xrange) != 2)
{
xrange = vector()
xrange[1] = min(x, na.rm=TRUE) - min(x, na.rm=TRUE) %% 0.1
xrange[2] = max(x, na.rm=TRUE) + 0.1 - (max(x, na.rm=TRUE) %% 0.1)
}
}
else
{
xrange = vector()
xrange[1] = min(x, na.rm=TRUE) - min(x, na.rm=TRUE) %% 0.1
xrange[2] = max(x, na.rm=TRUE) + 0.1 - (max(x, na.rm=TRUE) %% 0.1)
}
if (is.data.frame(x))
x <- unlist(x)
else x <- as.vector(x)
oldpar <- par("xaxs", "yaxs", "xpd", "mar")
par(xaxs="i", yaxs="i")
if(do.hex)
par(mar = c(5, 4, 4, 4))
plot(c(0, xdim[2]), c(0, xdim[1]), xlab = xlab, ylab = ylab,
type = "n", axes = FALSE, ...)
oldpar$usr <- par("usr")
if(!do.hex)
{
box()
pos <- 0
}
else pos <- -0.3
if(axes)
{
if (is.null(xat))
xat <- pretty(0:xdim[2])[-1]
axis(1, at = xat - 0.5, labels = xat, pos = pos)
if (is.null(yat))
yat <- pretty(0:xdim[1])[-1]
axis(2, at = xdim[1] - yat + 0.5, labels = yat)
}
if (all(is.na(cellcolors)))
{
if (Hinton)
{
if (is.na(extremes[1]))
extremes <- c("black", "white")
cellcolors <- extremes[(x > 0) + 1]
}
else cellcolors <- color.scale(x, cs1, cs2, cs3, extremes=extremes, na.color=na.color, color.spec=color.spec, xrange=xrange)
}
if (is.na(vcol))
vcol <- ifelse(colSums(col2rgb(cellcolors) * c(1,
1.4, 0.6)) < 350, "white", "black")
if (Hinton)
{
if (any(x < 0 | x > 1))
cellsize <- matrix(rescale(abs(x), c(0, 1)),
nrow = 10)
}
else cellsize <- matrix(1, nrow = xdim[1], ncol = xdim[2])
if (do.hex)
{
par(xpd = TRUE)
offset <- 0
if (length(border) < xdim[1] * xdim[2])
border <- rep(border, length.out = xdim[1] *
xdim[2])
for (row in 1:xdim[1])
{
for (column in 0:(xdim[2] - 1))
{
hexagon(column+offset, xdim[1]-row, unitcell=cellsize[row, column+1], col=cellcolors[row + xdim[1]*column], border=border[row + xdim[1]*column])
if (show.values)
text(column+offset+0.5, xdim[1]-row+0.5, x[row+column*xdim[1]], col=vcol[row + xdim[1]*column], cex=vcex)
}
offset <- ifelse(offset, 0, 0.5)
}
par(xpd=FALSE)
}
else
{
if (Hinton)
inset <- (1 - cellsize)/2
else inset <- 0
if (yrev)
{
y0 <- rep(seq(xdim[1] - 1, 0, by = -1), xdim[2]) + inset
y1 <- rep(seq(xdim[1], 1, by = -1), xdim[2]) - inset
}
else
{
y0 <- rep(0:(xdim[1] - 1), xdim[2]) + inset
y1 <- rep(1:xdim[1], xdim[2]) - inset
}
rect(sort(rep((1:xdim[2]) - 1, xdim[1])) + inset,
y0, sort(rep(1:xdim[2], xdim[1])) - inset, y1,
col = cellcolors, border = border)
if (show.values)
{
if (yrev) texty <- rep(seq(xdim[1] - 0.5, 0, by = -1), xdim[2])
else texty <- rep(seq(0.5, xdim[1] - 0.5, by = 1), xdim[2])
text(sort(rep((1:xdim[2]) - 0.5, xdim[1])), texty,
round(x, show.values), col = vcol, cex = vcex)
}
}
naxs <- which(is.na(x))
xy <- par("usr")
plot.din <- par("din")
plot.pin <- par("pin")
bottom.gap <- (xy[3] - xy[4]) * (plot.din[2] - plot.pin[2])/(2 * plot.pin[2])
grx1 <- xy[1]
gry1 <- bottom.gap * 0.95
grx2 <- xy[1] + (xy[2] - xy[1])/4
gry2 <- bottom.gap * 0.8
if (length(cellcolors) > 1)
{
colmat <- col2rgb(color.scale(xrange, cs1, cs2, cs3, extremes=extremes, na.color=na.color, color.spec=color.spec, xrange=xrange))
cs1 <- colmat[1, ]/255
cs2 <- colmat[2, ]/255
cs3 <- colmat[3, ]/255
color.spec <- "rgb"
}
rect.col <- color.scale(1:nslices, cs1, cs2, cs3, color.spec = color.spec)
if (show.legend)
color.legend(grx1, gry1, grx2, gry2, round(xrange, show.legend), rect.col=rect.col)
par(oldpar)
}
else cat("x must be a data frame or matrix\n")
}
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