write_fig: write figures into disk

In kongdd/Ipaper: Collection of personal practical R functions

write figures into disk

Description

write figure to pdf, tif, png, jpg, svg, or emf, according to file suffix.

Usage

write_fig(
  p,
  file = "Rplot.pdf",
  width = 10,
  height = 5,
  devices = NULL,
  res = 300,
  show = TRUE,
  use.cairo_pdf = TRUE,
  use.file_show = FALSE
)

Arguments

p	could be one of grid, ggplot or ⁠plot expression⁠
file	file path of output figure
width	the width of the device in inches.
height	the height of the device in inches.
devices	can be c("pdf", "tif", "tiff", "png", "jpg", "svg", "emf"). If not specified, devices will be determined according to the postpix of file. The default type is pdf.
res	The nominal resolution in ppi which will be recorded in the bitmap file, if a positive integer. Also used for units other than the default. If not specified, taken as 72 ppi to set the size of text and line widths.
show	Boolean. Whether show file after finished writing?
use.cairo_pdf	This parameter is for pdf type. whether to use grDevices::cairo_pdf? cairo_pdf supports self defined font, but can not create multiple page pdf.
use.file_show	boolean. If true, file.show will be used mandatorily.

See Also

grDevices::cairo_pdf(), grDevices::png(), Cairo::Cairo()

Examples

## Not run: 
library(ggplot2)
p <- ggplot(mpg, aes(class, hwy))
p1 <- p + geom_boxplot2()

## ggplot version
write_fig(p1, "Fig. 1. ggplot.pdf", show = TRUE)
# pdf_view("Fig. 1. ggplot.pdf")
write_fig(p1, "Fig. 1. ggplot", show = TRUE)
write_fig(p1, "Fig. 1. ggplot.pdf", show = TRUE, 
    devices = c("jpg", "png", "svg", "pdf", "tif", "emf"))

## lattice
x <- seq(pi/4, 5 * pi, length.out = 100)
y <- seq(pi/4, 5 * pi, length.out = 100)
r <- as.vector(sqrt(outer(x^2, y^2, "+")))
grid <- expand.grid(x=x, y=y)
grid$z <- cos(r^2) * exp(-r/(pi^3))
p <- levelplot(z~x*y, grid, cuts = 50, scales=list(log="e"), xlab="",
          ylab="", main="Weird Function", sub="with log scales",
          colorkey = FALSE, region = TRUE)

write_fig(p, "fig_lattice", show = TRUE)

## grid expression
g <- grid::circleGrob()
write_fig(g, "fig_grid", show = TRUE)

## R expression
write_fig({
    rx <- range(x <- 10*1:nrow(volcano))
    ry <- range(y <- 10*1:ncol(volcano))
    ry <- ry + c(-1, 1) * (diff(rx) - diff(ry))/2
    tcol <- terrain.colors(12)
    # par(opar); 
    # opar <- par(pty = "s", bg = "lightcyan")
    plot(x = 0, y = 0, type = "n", xlim = rx, ylim = ry, xlab = "", ylab = "")
    u <- par("usr")
    rect(u[1], u[3], u[2], u[4], col = tcol[8], border = "red")
    contour(x, y, volcano, col = tcol[2], lty = "solid", add = TRUE,
            vfont = c("sans serif", "plain"))
    title("A Topographic Map of Maunga Whau", font = 4)
    abline(h = 200*0:4, v = 200*0:4, col = "lightgray", lty = 2, lwd = 0.1)
}, "fig_expr.pdf")

# quote expression also works
expr = quote({
    rx <- range(x <- 10*1:nrow(volcano))
    ry <- range(y <- 10*1:ncol(volcano))
    ry <- ry + c(-1, 1) * (diff(rx) - diff(ry))/2
    tcol <- terrain.colors(12)
    # par(opar); 
    # opar <- par(pty = "s", bg = "lightcyan")
    plot(x = 0, y = 0, type = "n", xlim = rx, ylim = ry, xlab = "", ylab = "")
    u <- par("usr")
    rect(u[1], u[3], u[2], u[4], col = tcol[8], border = "red")
    contour(x, y, volcano, col = tcol[2], lty = "solid", add = TRUE,
            vfont = c("sans serif", "plain"))
    title("A Topographic Map of Maunga Whau", font = 4)
    abline(h = 200*0:4, v = 200*0:4, col = "lightgray", lty = 2, lwd = 0.1)
})
write_fig(expr, "fig_expr2.pdf")

## End(Not run)

kongdd/Ipaper documentation built on March 27, 2024, 5:34 a.m.