Nothing
"panel.needle" <-
function (x, y, horizontal = TRUE,
pch = if (is.null(groups)) dot.symbol$pch else sup.symbol$pch,
col = if (is.null(groups)) dot.symbol$col else sup.symbol$col,
lty = dot.line$lty, lwd = dot.line$lwd, col.line = dot.line$col,
levels.fos = NULL, groups = NULL, ...)
{
#adapted from panel.dotplot in lattice
x <- as.numeric(x)
y <- as.numeric(y)
dot.line <- trellis.par.get("dot.line")
dot.symbol <- trellis.par.get("dot.symbol")
sup.symbol <- trellis.par.get("superpose.symbol")
if (horizontal) {
yscale <- extendrange(y, f = .2)
if (is.null(levels.fos)) levels.fos <- floor(yscale[2]) - ceiling(yscale[1]) + 1
panel.abline(v = 0, col =1, lty = 1, lwd = 1)
pch <- rep(pch, length(x))
pch <- ifelse(x == 0, NA, pch)
for(i in seq(along=x)) lsegments(x[i], y[i], 0, y[i])
if (is.null(groups))
panel.xyplot(x = x, y = y, col = col, pch = pch, ...)
else panel.superpose(x = x, y = y, groups = groups, col = col, pch = pch, ...)
}
else {
xscale <- extendrange(x, f = .2)
if (is.null(levels.fos)) levels.fos <- floor(xscale[2]) - ceiling(xscale[1]) + 1
panel.abline(h = 0, col = col.line, lty = lty, lwd = lwd)
pch <- rep(pch, length(x))
pch <- ifelse(x == 0, NA, pch)
if (is.null(groups))panel.xyplot(x = x, y = y, col = col, pch = pch, ...)
else panel.superpose(x = x, y = y, groups = groups, col = col, pch = pch, ...)
}
}
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