You probably plan to save the plot via RStudio GUI. When you resize the plot window with your mouse, you need to run the code again to refresh the legend dimensions.
However, it's advantageous to use a more sophisticated method, e.g. to save it as a png with fixed dimensions like so:
library("sciplot")
library("lsr")
library("gplots")
png("Plot_1.png", height=400, width=500)
lineplot.CI(x.factor=clin.trial$drug,
response=clin.trial$mood.gain,
group=clin.trial$therapy,
ci.fun=ciMean,
xlab="Drug",
ylab="Mood Gain"
)
dev.off()
png("Plot_2.png", height=400, width=500)
interaction.plot(x.factor=clin.trial$drug,
trace.factor=clin.trial$therapy,
response=clin.trial$mood.gain,
fun=mean,
type="l",
lty=1, # line type
lwd=2, # line width
legend=T,
xlab="Drug", ylab="Mood Gain",
col=c("#00AFBB", "#E7B800"),
xpd=F,
trace.label="Therapy")
dev.off()
The plots are saved into your working directory, check getwd() .
Edit
You could also adjust the legend position.
In lineplot.CI you may use arguments; either by using characters just for x, e.g. x.leg="topleft" or both coordinates as numeric x.leg=.8, y.leg=2.2.
interaction.plot does not provide yet this functionality. I provide a hacked version below. Arguments are called xleg and yleg, functionality as above.
See ?legend for further explanations.
interaction.plot <- function (x.factor, trace.factor, response, fun = mean,
type = c("l", "p", "b", "o", "c"), legend = TRUE,
trace.label = deparse(substitute(trace.factor)),
fixed = FALSE, xlab = deparse(substitute(x.factor)),
ylab = ylabel, ylim = range(cells, na.rm = TRUE),
lty = nc:1, col = 1, pch = c(1L:9, 0, letters),
xpd = NULL, leg.bg = par("bg"), leg.bty = "n",
xtick = FALSE, xaxt = par("xaxt"), axes = TRUE,
xleg=NULL, yleg=NULL, ...) {
ylabel <- paste(deparse(substitute(fun)), "of ", deparse(substitute(response)))
type <- match.arg(type)
cells <- tapply(response, list(x.factor, trace.factor), fun)
nr <- nrow(cells)
nc <- ncol(cells)
xvals <- 1L:nr
if (is.ordered(x.factor)) {
wn <- getOption("warn")
options(warn = -1)
xnm <- as.numeric(levels(x.factor))
options(warn = wn)
if (!anyNA(xnm))
xvals <- xnm
}
xlabs <- rownames(cells)
ylabs <- colnames(cells)
nch <- max(sapply(ylabs, nchar, type = "width"))
if (is.null(xlabs))
xlabs <- as.character(xvals)
if (is.null(ylabs))
ylabs <- as.character(1L:nc)
xlim <- range(xvals)
if (is.null(xleg)) {
xleg <- xlim[2L] + 0.05 * diff(xlim)
xlim <- xlim + c(-0.2/nr, if (legend) 0.2 + 0.02 * nch else 0.2/nr) *
diff(xlim)
}
dev.hold()
on.exit(dev.flush())
matplot(xvals, cells, ..., type = type, xlim = xlim, ylim = ylim,
xlab = xlab, ylab = ylab, axes = axes, xaxt = "n",
col = col, lty = lty, pch = pch)
if (axes && xaxt != "n") {
axisInt <- function(x, main, sub, lwd, bg, log, asp,
...) axis(1, x, ...)
mgp. <- par("mgp")
if (!xtick)
mgp.[2L] <- 0
axisInt(1, at = xvals, labels = xlabs, tick = xtick,
mgp = mgp., xaxt = xaxt, ...)
}
if (legend) {
yrng <- diff(ylim)
if (is.null(yleg))
yleg <- ylim[2L] - 0.1 * yrng
if (!is.null(xpd) || {
xpd. <- par("xpd")
!is.na(xpd.) && !xpd. && (xpd <- TRUE)
}) {
op <- par(xpd = xpd)
on.exit(par(op), add = TRUE)
}
# text(xleg, ylim[2L] - 0.05 * yrng, paste(" ",
# trace.label), adj = 0)
if (!fixed) {
ord <- sort.list(cells[nr, ], decreasing = TRUE)
ylabs <- ylabs[ord]
lty <- lty[1 + (ord - 1)%%length(lty)]
col <- col[1 + (ord - 1)%%length(col)]
pch <- pch[ord]
}
legend(xleg, yleg, legend = ylabs, col = col,
title = if (trace.label == "") NULL else trace.label,
pch = if (type %in% c("p", "b"))
pch, lty = if (type %in% c("l", "b"))
lty, bty = leg.bty, bg = leg.bg)
}
invisible()
}
Data:
lk <- "https://learningstatisticswithr.com/data.zip"
tmp <- tempfile()
tmp.dir <- tempdir()
download.file(lk, tmp)
unzip(tmp, exdir=tmp.dir)
load("data/clinicaltrial.Rdata")
