Nothing
.plt.legend <-
function(colnms, horiz, color, fill, shape, box.bg, usr, lab_cex=0.8,
pt.size=1.25, legend_title=NULL, line_type="solid") {
# legend will have points or lines, shape="" for lines
par(xpd=NA)
# text color
the.clr <- getOption("lab_color")
if (missing(lab_cex)) {
text.cex <- ifelse(is.null(getOption("axis_x_cex")),
getOption("axis_cex"), getOption("axis_x_cex"))
text.cex <- 1.1 * text.cex
}
else
text.cex <- lab_cex
text.cex <- .85 * text.cex
if (text.cex < getOption("axis_cex")) text.cex <- getOption("axis_cex")
if (horiz) {
ll <- legend(0,0, legend=colnms, cex=.7, pt.cex=0.9,
horiz=TRUE, plot=FALSE) # get coordinates
size <- (par("cxy")/par("cin")) # 1 inch in user coordinates, [2] is y
bm.user <- par("mai")[1] * size[2] # size of bot margin in user coords
# move down, /5 is for the existing line of axis numbers
ytop <- usr[3] - (bm.user - (2.6 * bm.user/5))
# ytop <- usr[3] - (bm.user - bm.user/5 + ll$rect$h)
axis_horiz <- usr[2] - usr[1]
lgnd.hhalf <- (ll$rect$w) / 2
xleft <- usr[1] + axis_horiz/2 - lgnd.hhalf
legend(xleft, ytop, legend=colnms, horiz=TRUE, box.lwd=.5,
box.col="transparent", cex=text.cex, pt.cex=pt.size,
pt.bg=fill, bg=box.bg,
col=color, pch=shape, text.col=the.clr, title=legend_title)
}
else { # vertical
ll <- legend(0,0, legend=colnms, cex=.7, pt.cex=0.9,
horiz, plot=FALSE) # get coordinates
size <- (par("cxy")/par("cin")) # 1 inch in user coordinates
#dv <- ifelse (options("device") == "RStudioGD", 1, 3)
epsilon <- (size[1] - ll$rect$w) / 2
epsilon <- epsilon * .75
axis_vert <- usr[4] - usr[3]
xleft <- usr[2] + epsilon # usr[2] user coordinate of right axis
lgnd.vhalf <- ll$rect$h / 2
axis_cntr <- axis_vert / 2 + usr[3]
ytop <- axis_cntr + lgnd.vhalf # user coordinate of legend top
# xi <- ifelse (options("device") == "RStudioGD", 1.4, 1)
# yi <- ifelse (options("device") == "RStudioGD", 1.4, 1)
# display legend
# lwd needed to draw a line
legend(xleft, ytop, legend=colnms, horiz=FALSE, lwd=1.5, lty=line_type,
box.lwd=.5, box.col="transparent", cex=text.cex, pt.cex=pt.size,
pt.bg=fill, bg=box.bg,
col=color, pch=shape, text.col=the.clr,
x.intersp=1, y.intersp=1, title=legend_title)
}
par(xpd=FALSE) # cancel drawing outside of plot region (need for RStudio)
}
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