Nothing
setup_device = function(file, width, height) {
# write to file
if (!is.null(file)) {
filepath = file
filewidth = width
fileheight = height
if (is.null(filewidth)) filewidth = .tpar[["file.width"]]
if (is.null(fileheight)) fileheight = .tpar[["file.height"]]
fileres = .tpar[["file.res"]]
# catch to close interactive device if one isn't already open
fkdev = is.null(dev.list())
# grab existing device pars to pass on to next one
dop = par(no.readonly = TRUE)
# close interactive device if not already open
if (isTRUE(fkdev)) dev.off()
exttype = file_ext(filepath)
if (exttype == "jpg") exttype = "jpeg"
switch(exttype,
png = png(filepath, width = filewidth, height = fileheight, units = "in", res = fileres),
jpeg = jpeg(filepath, width = filewidth, height = fileheight, units = "in", res = fileres),
pdf = pdf(filepath, width = filewidth, height = fileheight),
svg = svg(filepath, width = filewidth, height = fileheight),
stop("\nUnsupported file extension. Only '.png', '.jpg', '.pdf', or '.svg' are allowed.\n")
)
dop$new = FALSE # catch for some interfaces
par(dop)
# interactive plot with user-specified width/height
} else if (!is.null(width) || !is.null(height)) {
devwidth = width
devheight = height
# if one of width or height is missing, set equal to the other
if (is.null(devwidth)) devwidth = devheight
if (is.null(devheight)) devheight = devwidth
# catch to close interactive device if one isn't already open
fkdev = is.null(dev.list())
# grab existing device pars to pass on to next one
dop = par(no.readonly = TRUE)
# close interactive device if not already open
if (isTRUE(fkdev)) dev.off()
dev.new(width = devwidth, height = devheight)
dop$new = FALSE # catch for some interfaces
par(dop)
}
}
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