Try sourcing in the 'new.legend' function below. It's the legend
function with a new argument called 'box.col'. The argument will change
the color of the box surrounding the legend. If I understand what it is
you are looking for, this should work. Also, I didn't see a way to
change the axis bar in your code, so I suppressed the axis in the call
to barplot, and manually replaced the axis using the axis function. I
hope this works for you.
Benjamin
data <- data.frame(Year=c(2000,2001,2002),
A=c(2,2,1),
B=c(3,1,2),
C=c(0,3,5))
data.mat <- as.matrix(data)[,2:4]
rownames(data.mat) <- data[['Year']]
data.mat <- t(data.mat)
textcolor="yellow"
par(col.axis=textcolor,col.main=textcolor)
barplot(data.mat,beside=TRUE,col=rainbow(3),main="Test",yaxt="n")
axis(2,at=0:5,col=textcolor)
new.legend(x="topleft", colnames(data[,2:4]),fill=rainbow(3),
inset=0.05,
text.col=textcolor,box.col=textcolor
)
########################################################################
###
########################################################################
###
new.legend <- function (x, y = NULL, legend, fill = NULL, col =
par("col"),
lty, lwd, pch, angle = 45, density = NULL, bty = "o", bg =
par("bg"),
box.lwd = par("lwd"), box.lty = par("lty"), box.col="black",
pt.bg = NA, cex = 1,
pt.cex = cex, pt.lwd = lwd, xjust = 0, yjust = 1, x.intersp = 1,
y.intersp = 1, adj = c(0, 0.5), text.width = NULL, text.col =
par("col"),
merge = do.lines && has.pch, trace = FALSE, plot = TRUE,
ncol = 1, horiz = FALSE, title = NULL, inset = 0)
{
if (missing(legend) && !missing(y) && (is.character(y) ||
is.expression(y))) {
legend <- y
y <- NULL
}
mfill <- !missing(fill) || !missing(density)
title <- as.graphicsAnnot(title)
if (length(title) > 1)
stop("invalid title")
legend <- as.graphicsAnnot(legend)
n.leg <- if (is.call(legend))
1
else length(legend)
if (n.leg == 0)
stop("'legend' is of length 0")
auto <- if (is.character(x))
match.arg(x, c("bottomright", "bottom", "bottomleft",
"left", "topleft", "top", "topright", "right", "center"))
else NA
if (is.na(auto)) {
xy <- xy.coords(x, y)
x <- xy$x
y <- xy$y
nx <- length(x)
if (nx < 1 || nx > 2)
stop("invalid coordinate lengths")
}
else nx <- 0
xlog <- par("xlog")
ylog <- par("ylog")
rect2 <- function(left, top, dx, dy, density = NULL, angle,
...) {
r <- left + dx
if (xlog) {
left <- 10^left
r <- 10^r
}
b <- top - dy
if (ylog) {
top <- 10^top
b <- 10^b
}
rect(left, top, r, b, angle = angle, density = density,
...)
}
segments2 <- function(x1, y1, dx, dy, ...) {
x2 <- x1 + dx
if (xlog) {
x1 <- 10^x1
x2 <- 10^x2
}
y2 <- y1 + dy
if (ylog) {
y1 <- 10^y1
y2 <- 10^y2
}
segments(x1, y1, x2, y2, ...)
}
points2 <- function(x, y, ...) {
if (xlog)
x <- 10^x
if (ylog)
y <- 10^y
points(x, y, ...)
}
text2 <- function(x, y, ...) {
if (xlog)
x <- 10^x
if (ylog)
y <- 10^y
text(x, y, ...)
}
if (trace)
catn <- function(...) do.call("cat", c(lapply(list(...),
formatC), list("\n")))
cin <- par("cin")
Cex <- cex * par("cex")
if (is.null(text.width))
text.width <- max(abs(strwidth(legend, units = "user",
cex = cex)))
else if (!is.numeric(text.width) || text.width < 0)
stop("'text.width' must be numeric, >= 0")
xc <- Cex * xinch(cin[1], warn.log = FALSE)
yc <- Cex * yinch(cin[2], warn.log = FALSE)
if (xc < 0)
text.width <- -text.width
xchar <- xc
xextra <- 0
yextra <- yc * (y.intersp - 1)
ymax <- yc * max(1, strheight(legend, units = "user", cex = cex)/yc)
ychar <- yextra + ymax
if (trace)
catn(" xchar=", xchar, "; (yextra,ychar)=", c(yextra,
ychar))
if (mfill) {
xbox <- xc * 0.8
ybox <- yc * 0.5
dx.fill <- xbox
}
do.lines <- (!missing(lty) && (is.character(lty) || any(lty >
0))) || !missing(lwd)
n.legpercol <- if (horiz) {
if (ncol != 1)
warning("horizontal specification overrides: Number of
columns := ",
n.leg)
ncol <- n.leg
1
}
else ceiling(n.leg/ncol)
if (has.pch <- !missing(pch) && length(pch) > 0) {
if (is.character(pch) && !is.na(pch[1]) && nchar(pch[1],
type = "c") > 1) {
if (length(pch) > 1)
warning("not using pch[2..] since pch[1] has multiple
chars")
np <- nchar(pch[1], type = "c")
pch <- substr(rep.int(pch[1], np), 1:np, 1:np)
}
if (!merge)
dx.pch <- x.intersp/2 * xchar
}
x.off <- if (merge)
-0.7
else 0
if (is.na(auto)) {
if (xlog)
x <- log10(x)
if (ylog)
y <- log10(y)
}
if (nx == 2) {
x <- sort(x)
y <- sort(y)
left <- x[1]
top <- y[2]
w <- diff(x)
h <- diff(y)
w0 <- w/ncol
x <- mean(x)
y <- mean(y)
if (missing(xjust))
xjust <- 0.5
if (missing(yjust))
yjust <- 0.5
}
else {
h <- (n.legpercol + (!is.null(title))) * ychar + yc
w0 <- text.width + (x.intersp + 1) * xchar
if (mfill)
w0 <- w0 + dx.fill
if (has.pch && !merge)
w0 <- w0 + dx.pch
if (do.lines)
w0 <- w0 + (2 + x.off) * xchar
w <- ncol * w0 + 0.5 * xchar
if (!is.null(title) && (tw <- strwidth(title, units = "user",
cex = cex) + 0.5 * xchar) > w) {
xextra <- (tw - w)/2
w <- tw
}
if (is.na(auto)) {
left <- x - xjust * w
top <- y + (1 - yjust) * h
}
else {
usr <- par("usr")
inset <- rep(inset, length.out = 2)
insetx <- inset[1] * (usr[2] - usr[1])
left <- switch(auto, bottomright = , topright = ,
right = usr[2] - w - insetx, bottomleft = , left = ,
topleft = usr[1] + insetx, bottom = , top = ,
center = (usr[1] + usr[2] - w)/2)
insety <- inset[2] * (usr[4] - usr[3])
top <- switch(auto, bottomright = , bottom = , bottomleft =
usr[3] +
h + insety, topleft = , top = , topright = usr[4] -
insety, left = , right = , center = (usr[3] +
usr[4] + h)/2)
}
}
if (plot && bty != "n") {
if (trace)
catn(" rect2(", left, ",", top, ", w=", w, ", h=",
h, ", ...)", sep = "")
rect2(left, top, dx = w, dy = h, col = bg, density = NULL,
lwd = box.lwd, lty = box.lty, border=box.col)
}
xt <- left + xchar + xextra + (w0 * rep.int(0:(ncol - 1),
rep.int(n.legpercol, ncol)))[1:n.leg]
yt <- top - 0.5 * yextra - ymax - (rep.int(1:n.legpercol,
ncol)[1:n.leg] - 1 + (!is.null(title))) * ychar
if (mfill) {
if (plot) {
fill <- rep(fill, length.out = n.leg)
rect2(left = xt, top = yt + ybox/2, dx = xbox, dy = ybox,
col = fill, density = density, angle = angle,
border = "black")
}
xt <- xt + dx.fill
}
if (plot && (has.pch || do.lines))
col <- rep(col, length.out = n.leg)
if (missing(lwd))
lwd <- par("lwd")
if (do.lines) {
seg.len <- 2
if (missing(lty))
lty <- 1
lty <- rep(lty, length.out = n.leg)
lwd <- rep(lwd, length.out = n.leg)
ok.l <- !is.na(lty) & (is.character(lty) | lty > 0)
if (trace)
catn(" segments2(", xt[ok.l] + x.off * xchar, ",",
yt[ok.l], ", dx=", seg.len * xchar, ", dy=0, ...)")
if (plot)
segments2(xt[ok.l] + x.off * xchar, yt[ok.l], dx = seg.len *
xchar, dy = 0, lty = lty[ok.l], lwd = lwd[ok.l],
col = col[ok.l])
xt <- xt + (seg.len + x.off) * xchar
}
if (has.pch) {
pch <- rep(pch, length.out = n.leg)
pt.bg <- rep(pt.bg, length.out = n.leg)
pt.cex <- rep(pt.cex, length.out = n.leg)
pt.lwd <- rep(pt.lwd, length.out = n.leg)
ok <- !is.na(pch) & (is.character(pch) | pch >= 0)
x1 <- (if (merge)
xt - (seg.len/2) * xchar
else xt)[ok]
y1 <- yt[ok]
if (trace)
catn(" points2(", x1, ",", y1, ", pch=", pch[ok],
", ...)")
if (plot)
points2(x1, y1, pch = pch[ok], col = col[ok], cex =
pt.cex[ok],
bg = pt.bg[ok], lwd = pt.lwd[ok])
if (!merge)
xt <- xt + dx.pch
}
xt <- xt + x.intersp * xchar
if (plot) {
if (!is.null(title))
text2(left + w/2, top - ymax, labels = title, adj = c(0.5,
0), cex = cex, col = text.col)
text2(xt, yt, labels = legend, adj = adj, cex = cex,
col = text.col)
}
invisible(list(rect = list(w = w, h = h, left = left, top = top),
text = list(x = xt, y = yt)))
}
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