Handling axis with dates in twoord.plot (remove axis 3) - r

Question

I am trying to use twoord.plot with different dates on x axis and counts for ly and percentages for ry, and I want to remove axis 3 or change its color. Setting axes = F does not work, neither does xaxt = 'n'.
In fact, axes = FALSE gives me this error message:
Error in plot.default(lx, ly, xlim = xlim, ylim = lylim, xlab = xlab, :
formal argument "axes" matched by multiple actual arguments
The solution given here:
Remove all axis values and labels in twoord plot does not work for me with different rx and lx.
Here is a similar code to that I'm using:
set.seed(123)
library(plotrix)
twoord.plot(
lx = seq(as.Date("2016-01-01"), as.Date("2017-01-01"), by = "days"),
ly = round(runif(367) * 6),
rx = seq(as.Date("2016-05-09"), as.Date("2017-01-12"), by = "days"),
ry = sort(rnorm(249, 60, 10)),
lylim = range(round(runif(367) * 6)) + c(0, 10),
rylim = range(sort(rnorm(249, 60, 10))) + c(-35, 10),
ylab.at = mean(round(runif(367) * 6)),
rylab.at = mean(sort(rnorm(249, 60, 10))),
rylab = "Percentages %", ylab = "No. of x",
type = c("l", "l"), lcol = "skyblue4", rcol = "chocolate1" ,
xtickpos = as.numeric(seq(as.Date("2016-01-01"), as.Date("2017-01-01"), by = "months")),
xticklab = seq(as.Date("2016-01-01"), as.Date("2017-01-01"), by = "months"))
Any ideas on how to this? Thanks in advance! :)

Answer 1

Just hack the twoord.plot function. Here's an example to make all axis labels black (Use twoord.plot2 instead of twoord.plot when creating the plot). If you want to remove the axes altogether, just comment (add # before the lines) Lines 88-90 (For ly) and Lines 123-125 (for ry). I have left notes for them in the function below.
twoord.plot2 = function (lx, ly, rx, ry, data = NULL, main = "", xlim = NULL,
lylim = NULL, rylim = NULL, mar = c(5, 4, 4, 4), lcol = 1,
rcol = 2, xlab = "", lytickpos = NA, ylab = "", ylab.at = NA,
rytickpos = NA, rylab = "", rylab.at = NA, lpch = 1, rpch = 2,
type = "b", xtickpos = NULL, xticklab = NULL, halfwidth = 0.4,
axislab.cex = 1, do.first = NULL, ...)
{
if (!is.null(data)) {
ly <- unlist(data[ly])
ry <- unlist(data[ry])
if (missing(lx))
lx <- 1:length(ly)
else lx <- unlist(data[lx])
if (missing(rx))
rx <- 1:length(ry)
else rx <- unlist(data[rx])
}
if (missing(lx))
lx <- 1:length(ly)
if (missing(ry)) {
if (missing(rx)) {
rx <- 1:length(ry)
ry <- ly
ly <- lx
lx <- 1:length(ly)
}
else {
ry <- rx
rx <- 1:length(ry)
}
}
oldmar <- par("mar")
par(mar = mar)
if (is.null(xlim))
xlim <- range(c(lx, rx))
if (missing(lx))
lx <- 1:length(ly)
if (is.null(lylim)) {
lylim <- range(ly, na.rm = TRUE)
lyspan <- diff(lylim)
if (lyspan == 0)
lyspan <- lylim[1]
lylim[2] <- lylim[2] + lyspan * 0.04
if (lylim[1] != 0)
lylim[1] <- lylim[1] - lyspan * 0.04
}
if (length(type) < 2)
type <- rep(type, 2)
if (match(type[1], "bar", 0)) {
oldcex <- par(cex = axislab.cex)
plot(lx, ly, xlim = xlim, ylim = lylim, xlab = xlab,
ylab = "", yaxs = "i", type = "n", main = "", axes = FALSE,
...)
par(oldcex)
if (!is.null(do.first))
eval(parse(text = do.first))
ybottom <- par("usr")[3]
if (lylim[1] < 0)
abline(h = 0, lty = 2)
rect(lx - halfwidth, ifelse(ly < 0, ly, ybottom), lx +
halfwidth, ifelse(ly > 0, ly, 0), col = lcol)
}
else {
oldcex <- par(cex = axislab.cex)
plot(lx, ly, xlim = xlim, ylim = lylim, xlab = xlab,
ylab = "", yaxs = "i", type = "n", main = "", axes = FALSE,
...)
par(oldcex)
if (!is.null(do.first))
eval(parse(text = do.first))
points(lx, ly, col = lcol, pch = lpch, type = type[1],
...)
}
title(main = main)
xylim <- par("usr")
box()
if (is.null(xticklab))
axis(1, cex.axis = axislab.cex)
else {
if (is.null(xtickpos))
xtickpos <- 1:length(xticklab)
axis(1, at = xtickpos, labels = xticklab, cex.axis = axislab.cex)
}
if (is.na(lytickpos[1]))
lytickpos <- pretty(ly)
if (is.na(ylab.at))
ylab.at <- mean(lytickpos)
color.axis(2, at = lytickpos, axlab = ylab, axlab.at = ylab.at, #LINE 88
col = "black", cex.axis = axislab.cex, #col = ifelse(is.na(lcol), 1, lcol), cex.axis = axislab.cex,
cex = axislab.cex) #LINE 90
if (is.null(rylim)) {
rylim <- range(ry, na.rm = TRUE)
ryspan <- diff(rylim)
if (ryspan == 0)
ryspan <- rylim[1]
rylim[2] <- rylim[2] + ryspan * 0.04
if (rylim[1] != 0)
rylim[1] <- rylim[1] - ryspan * 0.04
}
ymult <- diff(lylim)/diff(rylim)
yoff <- lylim[1] - rylim[1] * ymult
if (match(type[2], "bar", 0)) {
if (rylim[1] < 0)
abline("h", 0)
rect(rx - halfwidth, ifelse(ry < 0, ry, rylim[1] * ymult +
yoff), rx + halfwidth, ifelse(ry > 0, ry * ymult +
yoff, 0), col = rcol)
}
else points(rx, ry * ymult + yoff, col = rcol, pch = rpch,
type = type[2], ...)
if (is.na(rytickpos[1]))
rylabels <- pretty(rylim)
else rylabels <- rytickpos
if (min(rylabels) < rylim[1])
rylabels <- rylabels[rylabels >= rylim[1]]
if (max(rylabels) > rylim[2])
rylabels <- rylabels[rylabels <= rylim[2]]
axat <- rylabels * ymult + yoff
if (is.na(rylab.at))
rylab.at <- mean(rytickpos)
if (!is.na(rylab.at))
rylab.at <- rylab.at * ymult + yoff
color.axis(4, at = axat, labels = rylabels, axlab = rylab, #LINE 123
axlab.at = rylab.at, col = "black", #axlab.at = rylab.at, col = ifelse(is.na(rcol), 1, rcol),
cex.axis = axislab.cex, cex = axislab.cex) #LINE 125
par(mar = oldmar, new = FALSE, col.axis = "black")
}