ragg (version 0.1.1)

agg_ppm: Draw to a PPM file

Description

The PPM (Portable Pixel Map) format defines one of the simplest storage formats available for image data. It is basically a raw 8bit RGB stream with a few bytes of information in the start. It goes without saying, that this file format is horribly inefficient and should only be used if you want to play around with a simple file format, or need a file-based image stream.

Usage

agg_ppm(filename = "Rplot%03d.ppm", width = 480, height = 480,
  units = "px", pointsize = 12, background = "white", res = 72)

Arguments

filename

The name of the file. Follows the same semantics as the file naming in [grDevices::png()], meaning that you can provide a [sprintf()] compliant string format to name multiple plots (such as the default value)

width, height

The dimensions of the device

units

The unit `width` and `height` is measured in, in either pixels (`'px'`), inches (`'in'`), millimeters (`'mm'`), or centimeter (`'cm'`).

pointsize

The default pointsize of the device in pt

background

The background colour of the device

res

The resolution of the device. This setting will govern how device dimensions given in inches, centimeters, or millimeters will be converted to pixels. Further, it will be used to scale text sizes and linewidths

Examples

# NOT RUN {
file <- tempfile(fileext = '.ppm')
agg_ppm(file)
plot(sin, -pi, 2*pi)
dev.off()

# }